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Currently if some one try to advance bvec beyond it's size we simply
dump WARN_ONCE and continue to iterate beyond bvec array boundaries.
This simply means that we endup dereferencing/corrupting random memory
region.
Sane reaction would be to propagate error back to calling context
But bvec_iter_advance's calling context is not always good for error
handling. For safity reason let truncate iterator size to zero which
will break external iteration loop which prevent us from unpredictable
memory range corruption. And even it caller ignores an error, it will
corrupt it's own bvecs, not others.
This patch does:
- Return error back to caller with hope that it will react on this
- Truncate iterator size
Code was added long time ago here 4550dd6c, luckily no one hit it
in real life :)
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
[hch: switch to true/false returns instead of errno values]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Currently all integrity prep hooks are open-coded, and if prepare fails
we ignore it's code and fail bio with EIO. Let's return real error to
upper layer, so later caller may react accordingly.
In fact no one want to use bio_integrity_prep() w/o bio_integrity_enabled,
so it is reasonable to fold it in to one function.
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
[hch: merged with the latest block tree,
return bool from bio_integrity_prep]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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bio_integrity_trim inherent it's interface from bio_trim and accept
offset and size, but this API is error prone because data offset
must always be insync with bio's data offset. That is why we have
integrity update hook in bio_advance()
So only meaningful values are: offset == 0, sectors == bio_sectors(bio)
Let's just remove them completely.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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SCSI drivers do care about bip_seed so we must update it accordingly.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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When mq-deadline is taken, IOPS of sequential read and
seqential write is observed more than 20% drop on sata(scsi-mq)
devices, compared with using 'none' scheduler.
The reason is that the default nr_requests for scheduler is
too big for small queuedepth devices, and latency is increased
much.
Since the principle of taking 256 requests for mq scheduler
is based on 128 queue depth, this patch changes into
double size of min(hw queue_depth, 128).
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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On each deactivation or re-scheduling (after being served) of a
bfq_queue, BFQ invokes the function __bfq_entity_update_weight_prio(),
to perform pending updates of ioprio, weight and ioprio class for the
bfq_queue. BFQ also invokes this function on I/O-request dispatches,
to raise or lower weights more quickly when needed, thereby improving
latency. However, the entity representing the bfq_queue may be on the
active (sub)tree of a service tree when this happens, and, although
with a very low probability, the bfq_queue may happen to also have a
pending change of its ioprio class. If both conditions hold when
__bfq_entity_update_weight_prio() is invoked, then the entity moves to
a sort of hybrid state: the new service tree for the entity, as
returned by bfq_entity_service_tree(), differs from service tree on
which the entity still is. The functions that handle activations and
deactivations of entities do not cope with such a hybrid state (and
would need to become more complex to cope).
This commit addresses this issue by just making
__bfq_entity_update_weight_prio() not perform also a possible pending
change of ioprio class, when invoked on an I/O-request dispatch for a
bfq_queue. Such a change is thus postponed to when
__bfq_entity_update_weight_prio() is invoked on deactivation or
re-scheduling of the bfq_queue.
Reported-by: Marco Piazza <mpiazza@gmail.com>
Reported-by: Laurentiu Nicola <lnicola@dend.ro>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Tested-by: Marco Piazza <mpiazza@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 mm updates from Ingo Molnar:
"The main changes in this cycle were:
- Continued work to add support for 5-level paging provided by future
Intel CPUs. In particular we switch the x86 GUP code to the generic
implementation. (Kirill A. Shutemov)
- Continued work to add PCID CPU support to native kernels as well.
In this round most of the focus is on reworking/refreshing the TLB
flush infrastructure for the upcoming PCID changes. (Andy
Lutomirski)"
* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (34 commits)
x86/mm: Delete a big outdated comment about TLB flushing
x86/mm: Don't reenter flush_tlb_func_common()
x86/KASLR: Fix detection 32/64 bit bootloaders for 5-level paging
x86/ftrace: Exclude functions in head64.c from function-tracing
x86/mmap, ASLR: Do not treat unlimited-stack tasks as legacy mmap
x86/mm: Remove reset_lazy_tlbstate()
x86/ldt: Simplify the LDT switching logic
x86/boot/64: Put __startup_64() into .head.text
x86/mm: Add support for 5-level paging for KASLR
x86/mm: Make kernel_physical_mapping_init() support 5-level paging
x86/mm: Add sync_global_pgds() for configuration with 5-level paging
x86/boot/64: Add support of additional page table level during early boot
x86/boot/64: Rename init_level4_pgt and early_level4_pgt
x86/boot/64: Rewrite startup_64() in C
x86/boot/compressed: Enable 5-level paging during decompression stage
x86/boot/efi: Define __KERNEL32_CS GDT on 64-bit configurations
x86/boot/efi: Fix __KERNEL_CS definition of GDT entry on 64-bit configurations
x86/boot/efi: Cleanup initialization of GDT entries
x86/asm: Fix comment in return_from_SYSCALL_64()
x86/mm/gup: Switch GUP to the generic get_user_page_fast() implementation
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 microcode updates from Ingo Molnar:
"The main changes are a fix early microcode application for
resume-from-RAM, plus a 32-bit initrd placement fix - by Borislav
Petkov"
* 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/microcode: Make a couple of symbols static
x86/microcode/intel: Save pointer to ucode patch for early AP loading
x86/microcode: Look for the initrd at the correct address on 32-bit
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 hyperv updates from Ingo Molnar:
"Avoid boot time TSC calibration on Hyper-V hosts, to improve
calibration robustness. (Vitaly Kuznetsov)"
* 'x86-hyperv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/hyperv: Read TSC frequency from a synthetic MSR
x86/hyperv: Check frequency MSRs presence according to the specification
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 debug update from Ingo Molnar:
"A single fix for an off-by one bug in test_nmi_ipi() that probably
doesn't matter in practice"
* 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/nmi: Fix timeout test in test_nmi_ipi()
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cleanups from Ingo Molnar:
"Two small cleanups"
* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/paravirt: Remove unnecessary return from void function
x86/boot: Add missing strchr() declaration
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 boot updates from Ingo Molnar:
"The main changes in this cycle were KASLR improvements for rare
environments with special boot options, by Baoquan He. Also misc
smaller changes/cleanups"
* 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/debug: Extend the lower bound of crash kernel low reservations
x86/boot: Remove unused copy_*_gs() functions
x86/KASLR: Use the right memcpy() implementation
Documentation/kernel-parameters.txt: Update 'memmap=' boot option description
x86/KASLR: Handle the memory limit specified by the 'memmap=' and 'mem=' boot options
x86/KASLR: Parse all 'memmap=' boot option entries
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 asm updates from Ingo Molnar:
"A single commit micro-optimizing short user copies on certain Intel
CPUs"
* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/uaccess: Optimize copy_user_enhanced_fast_string() for short strings
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 apic updates from Ingo Molnar:
"Janitorial changes: removal of an unused function plus __init
annotations"
* 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/apic: Make arch_init_msi/htirq_domain __init
x86/apic: Make init_legacy_irqs() __init
x86/ioapic: Remove unused IO_APIC_irq_trigger() function
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull nohz updates from Ingo Molnar:
"The main changes in this cycle relate to fixing another bad (but
sporadic and hard to detect) interaction between the dynticks
scheduler tick and hrtimers, plus related improvements to better
detection and handling of similar problems - by Frédéric Weisbecker"
* 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
nohz: Fix spurious warning when hrtimer and clockevent get out of sync
nohz: Fix buggy tick delay on IRQ storms
nohz: Reset next_tick cache even when the timer has no regs
nohz: Fix collision between tick and other hrtimers, again
nohz: Add hrtimer sanity check
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
"The main changes in this cycle were:
- Add the SYSTEM_SCHEDULING bootup state to move various scheduler
debug checks earlier into the bootup. This turns silent and
sporadically deadly bugs into nice, deterministic splats. Fix some
of the splats that triggered. (Thomas Gleixner)
- A round of restructuring and refactoring of the load-balancing and
topology code (Peter Zijlstra)
- Another round of consolidating ~20 of incremental scheduler code
history: this time in terms of wait-queue nomenclature. (I didn't
get much feedback on these renaming patches, and we can still
easily change any names I might have misplaced, so if anyone hates
a new name, please holler and I'll fix it.) (Ingo Molnar)
- sched/numa improvements, fixes and updates (Rik van Riel)
- Another round of x86/tsc scheduler clock code improvements, in hope
of making it more robust (Peter Zijlstra)
- Improve NOHZ behavior (Frederic Weisbecker)
- Deadline scheduler improvements and fixes (Luca Abeni, Daniel
Bristot de Oliveira)
- Simplify and optimize the topology setup code (Lauro Ramos
Venancio)
- Debloat and decouple scheduler code some more (Nicolas Pitre)
- Simplify code by making better use of llist primitives (Byungchul
Park)
- ... plus other fixes and improvements"
* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (103 commits)
sched/cputime: Refactor the cputime_adjust() code
sched/debug: Expose the number of RT/DL tasks that can migrate
sched/numa: Hide numa_wake_affine() from UP build
sched/fair: Remove effective_load()
sched/numa: Implement NUMA node level wake_affine()
sched/fair: Simplify wake_affine() for the single socket case
sched/numa: Override part of migrate_degrades_locality() when idle balancing
sched/rt: Move RT related code from sched/core.c to sched/rt.c
sched/deadline: Move DL related code from sched/core.c to sched/deadline.c
sched/cpuset: Only offer CONFIG_CPUSETS if SMP is enabled
sched/fair: Spare idle load balancing on nohz_full CPUs
nohz: Move idle balancer registration to the idle path
sched/loadavg: Generalize "_idle" naming to "_nohz"
sched/core: Drop the unused try_get_task_struct() helper function
sched/fair: WARN() and refuse to set buddy when !se->on_rq
sched/debug: Fix SCHED_WARN_ON() to return a value on !CONFIG_SCHED_DEBUG as well
sched/wait: Disambiguate wq_entry->task_list and wq_head->task_list naming
sched/wait: Move bit_wait_table[] and related functionality from sched/core.c to sched/wait_bit.c
sched/wait: Split out the wait_bit*() APIs from <linux/wait.h> into <linux/wait_bit.h>
sched/wait: Re-adjust macro line continuation backslashes in <linux/wait.h>
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Ingo Molnar:
"Most of the changes are for tooling, the main changes in this cycle were:
- Improve Intel-PT hardware tracing support, both on the kernel and
on the tooling side: PTWRITE instruction support, power events for
C-state tracing, etc. (Adrian Hunter)
- Add support to measure SMI cost to the x86 architecture, with
tooling support in 'perf stat' (Kan Liang)
- Support function filtering in 'perf ftrace', plus related
improvements (Namhyung Kim)
- Allow adding and removing fields to the default 'perf script'
columns, using + or - as field prefixes to do so (Andi Kleen)
- Allow resolving the DSO name with 'perf script -F brstack{sym,off},dso'
(Mark Santaniello)
- Add perf tooling unwind support for PowerPC (Paolo Bonzini)
- ... and various other improvements as well"
* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (84 commits)
perf auxtrace: Add CPU filter support
perf intel-pt: Do not use TSC packets for calculating CPU cycles to TSC
perf intel-pt: Update documentation to include new ptwrite and power events
perf intel-pt: Add example script for power events and PTWRITE
perf intel-pt: Synthesize new power and "ptwrite" events
perf intel-pt: Move code in intel_pt_synth_events() to simplify attr setting
perf intel-pt: Factor out intel_pt_set_event_name()
perf intel-pt: Tidy messages into called function intel_pt_synth_event()
perf intel-pt: Tidy Intel PT evsel lookup into separate function
perf intel-pt: Join needlessly wrapped lines
perf intel-pt: Remove unused instructions_sample_period
perf intel-pt: Factor out common code synthesizing event samples
perf script: Add synthesized Intel PT power and ptwrite events
perf/x86/intel: Constify the 'lbr_desc[]' array and make a function static
perf script: Add 'synth' field for synthesized event payloads
perf auxtrace: Add itrace option to output power events
perf auxtrace: Add itrace option to output ptwrite events
tools include: Add byte-swapping macros to kernel.h
perf script: Add 'synth' event type for synthesized events
x86/insn: perf tools: Add new ptwrite instruction
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
"The main changes in this cycle were:
- Add CONFIG_REFCOUNT_FULL=y to allow the disabling of the 'full'
(robustness checked) refcount_t implementation with slightly lower
runtime overhead. (Kees Cook)
The lighter weight variant is the default. The two variants use the
same API. Having this variant was a precondition by some
maintainers to merge refcount_t cleanups.
- Add lockdep support for rtmutexes (Peter Zijlstra)
- liblockdep fixes and improvements (Sasha Levin, Ben Hutchings)
- ... misc fixes and improvements"
* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits)
locking/refcount: Remove the half-implemented refcount_sub() API
locking/refcount: Create unchecked atomic_t implementation
locking/rtmutex: Don't initialize lockdep when not required
locking/selftest: Add RT-mutex support
locking/selftest: Remove the bad unlock ordering test
rt_mutex: Add lockdep annotations
MAINTAINERS: Claim atomic*_t maintainership
locking/x86: Remove the unused atomic_inc_short() methd
tools/lib/lockdep: Remove private kernel headers
tools/lib/lockdep: Hide liblockdep output from test results
tools/lib/lockdep: Add dummy current_gfp_context()
tools/include: Add IS_ERR_OR_NULL to err.h
tools/lib/lockdep: Add empty __is_[module,kernel]_percpu_address
tools/lib/lockdep: Include err.h
tools/include: Add (mostly) empty include/linux/sched/mm.h
tools/lib/lockdep: Use LDFLAGS
tools/lib/lockdep: Remove double-quotes from soname
tools/lib/lockdep: Fix object file paths used in an out-of-tree build
tools/lib/lockdep: Fix compilation for 4.11
tools/lib/lockdep: Don't mix fd-based and stream IO
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI updates from Ingo Molnar:
"The main changes in this cycle were:
- Rework the EFI capsule loader to allow for workarounds for
non-compliant firmware (Ard Biesheuvel)
- Implement a capsule loader quirk for Quark X102x (Jan Kiszka)
- Enable SMBIOS/DMI support for the ARM architecture (Ard Biesheuvel)
- Add CONFIG_EFI_PGT_DUMP=y support for x86-32 and kexec (Sai
Praneeth)
- Fixes for EFI support for Xen dom0 guests running under x86-64
hosts (Daniel Kiper)"
* 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/xen/efi: Initialize only the EFI struct members used by Xen
efi: Process the MEMATTR table only if EFI_MEMMAP is enabled
efi/arm: Enable DMI/SMBIOS
x86/efi: Extend CONFIG_EFI_PGT_DUMP support to x86_32 and kexec as well
efi/efi_test: Use memdup_user() helper
efi/capsule: Add support for Quark security header
efi/capsule-loader: Use page addresses rather than struct page pointers
efi/capsule-loader: Redirect calls to efi_capsule_setup_info() via weak alias
efi/capsule: Remove NULL test on kmap()
efi/capsule-loader: Use a cached copy of the capsule header
efi/capsule: Adjust return type of efi_capsule_setup_info()
efi/capsule: Clean up pr_err/_info() messages
efi/capsule: Remove pr_debug() on ENOMEM or EFAULT
efi/capsule: Fix return code on failing kmap/vmap
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU updates from Ingo Molnar:
"The sole purpose of these changes is to shrink and simplify the RCU
code base, which has suffered from creeping bloat over the past couple
of years. The end result is a net removal of ~2700 lines of code:
79 files changed, 1496 insertions(+), 4211 deletions(-)
Plus there's a marked reduction in the Kconfig space complexity as
well, here's the number of matches on 'grep RCU' in the .config:
before after
x86-defconfig 17 15
x86-allmodconfig 33 20"
* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (86 commits)
rcu: Remove RCU CPU stall warnings from Tiny RCU
rcu: Remove event tracing from Tiny RCU
rcu: Move RCU debug Kconfig options to kernel/rcu
rcu: Move RCU non-debug Kconfig options to kernel/rcu
rcu: Eliminate NOCBs CPU-state Kconfig options
rcu: Remove debugfs tracing
srcu: Remove Classic SRCU
srcu: Fix rcutorture-statistics typo
rcu: Remove SPARSE_RCU_POINTER Kconfig option
rcu: Remove the now-obsolete PROVE_RCU_REPEATEDLY Kconfig option
rcu: Remove typecheck() from RCU locking wrapper functions
rcu: Remove #ifdef moving rcu_end_inkernel_boot from rcupdate.h
rcu: Remove nohz_full full-system-idle state machine
rcu: Remove the RCU_KTHREAD_PRIO Kconfig option
rcu: Remove *_SLOW_* Kconfig options
srcu: Use rnp->lock wrappers to replace explicit memory barriers
rcu: Move rnp->lock wrappers for SRCU use
rcu: Convert rnp->lock wrappers to macros for SRCU use
rcu: Refactor #includes from include/linux/rcupdate.h
bcm47xx: Fix build regression
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull objtool updates from Ingo Molnar:
"This is an extensive rewrite of the objdump tool to track all stack
pointer modifications through the machine instructions of disassembled
functions found in kernel .o files.
This re-design removes the prior dependency on CONFIG_FRAME_POINTERS,
with the goal to prepare the tool to generate kernel debuginfo data in
the future. There's also an increase in checking/tracking robustness
as a side effect as well.
No (intended) changes to existing functionality"
* 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Silence warnings for functions which use IRET
objtool: Implement stack validation 2.0
objtool, x86: Add several functions and files to the objtool whitelist
objtool: Move checking code to check.c
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Pull EDAC updates from Borislav Petkov:
"Nothing earth-shattering - just the normal development flow of
cleanups, improvements, fixes and such.
Summary:
- i31200_edac: Add Kabylake support (Jason Baron)
- sb_edac: resolve memory controller detection issues on asymmetric
setups with not all DIMM slots being populated (Tony Luck and Qiuxu
Zhuo)
- misc cleanups and fixlets all over"
* tag 'edac_for_4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: (22 commits)
EDAC, pnd2: Fix Apollo Lake DIMM detection
EDAC, i5000, i5400: Fix definition of NRECMEMB register
EDAC, pnd2: Make function sbi_send() static
EDAC, pnd2: Return proper error value from apl_rd_reg()
EDAC, altera: Simplify calculation of total memory
EDAC, sb_edac: Avoid creating SOCK memory controller
EDAC, mce_amd: Fix typo in SMCA error description
EDAC, mv64x60: Sanity check edac_op_state before registering
EDAC, thunderx: Fix a warning during l2c debugfs node creation
EDAC, mv64x60: Check driver registration success
EDAC, ie31200: Add Intel Kaby Lake CPU support
EDAC, mv64x60: Replace in_le32()/out_le32() with readl()/writel()
EDAC, mv64x60: Fix pdata->name
EDAC, sb_edac: Bump driver version and do some cleanups
EDAC, sb_edac: Check if ECC enabled when at least one DIMM is present
EDAC, sb_edac: Drop NUM_CHANNELS from 8 back to 4
EDAC, sb_edac: Carve out dimm-populating loop
EDAC, sb_edac: Fix mod_name
EDAC, sb_edac: Assign EDAC memory controller per h/w controller
EDAC, sb_edac: Don't use "Socket#" in the memory controller name
...
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Pull core block/IO updates from Jens Axboe:
"This is the main pull request for the block layer for 4.13. Not a huge
round in terms of features, but there's a lot of churn related to some
core cleanups.
Note this depends on the UUID tree pull request, that Christoph
already sent out.
This pull request contains:
- A series from Christoph, unifying the error/stats codes in the
block layer. We now use blk_status_t everywhere, instead of using
different schemes for different places.
- Also from Christoph, some cleanups around request allocation and IO
scheduler interactions in blk-mq.
- And yet another series from Christoph, cleaning up how we handle
and do bounce buffering in the block layer.
- A blk-mq debugfs series from Bart, further improving on the support
we have for exporting internal information to aid debugging IO
hangs or stalls.
- Also from Bart, a series that cleans up the request initialization
differences across types of devices.
- A series from Goldwyn Rodrigues, allowing the block layer to return
failure if we will block and the user asked for non-blocking.
- Patch from Hannes for supporting setting loop devices block size to
that of the underlying device.
- Two series of patches from Javier, fixing various issues with
lightnvm, particular around pblk.
- A series from me, adding support for write hints. This comes with
NVMe support as well, so applications can help guide data placement
on flash to improve performance, latencies, and write
amplification.
- A series from Ming, improving and hardening blk-mq support for
stopping/starting and quiescing hardware queues.
- Two pull requests for NVMe updates. Nothing major on the feature
side, but lots of cleanups and bug fixes. From the usual crew.
- A series from Neil Brown, greatly improving the bio rescue set
support. Most notably, this kills the bio rescue work queues, if we
don't really need them.
- Lots of other little bug fixes that are all over the place"
* 'for-4.13/block' of git://git.kernel.dk/linux-block: (217 commits)
lightnvm: pblk: set line bitmap check under debug
lightnvm: pblk: verify that cache read is still valid
lightnvm: pblk: add initialization check
lightnvm: pblk: remove target using async. I/Os
lightnvm: pblk: use vmalloc for GC data buffer
lightnvm: pblk: use right metadata buffer for recovery
lightnvm: pblk: schedule if data is not ready
lightnvm: pblk: remove unused return variable
lightnvm: pblk: fix double-free on pblk init
lightnvm: pblk: fix bad le64 assignations
nvme: Makefile: remove dead build rule
blk-mq: map all HWQ also in hyperthreaded system
nvmet-rdma: register ib_client to not deadlock in device removal
nvme_fc: fix error recovery on link down.
nvmet_fc: fix crashes on bad opcodes
nvme_fc: Fix crash when nvme controller connection fails.
nvme_fc: replace ioabort msleep loop with completion
nvme_fc: fix double calls to nvme_cleanup_cmd()
nvme-fabrics: verify that a controller returns the correct NQN
nvme: simplify nvme_dev_attrs_are_visible
...
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Pull uuid subsystem from Christoph Hellwig:
"This is the new uuid subsystem, in which Amir, Andy and I have started
consolidating our uuid/guid helpers and improving the types used for
them. Note that various other subsystems have pulled in this tree, so
I'd like it to go in early.
UUID/GUID summary:
- introduce the new uuid_t/guid_t types that are going to replace the
somewhat confusing uuid_be/uuid_le types and make the terminology
fit the various specs, as well as the userspace libuuid library.
(me, based on a previous version from Amir)
- consolidated generic uuid/guid helper functions lifted from XFS and
libnvdimm (Amir and me)
- conversions to the new types and helpers (Amir, Andy and me)"
* tag 'uuid-for-4.13' of git://git.infradead.org/users/hch/uuid: (34 commits)
ACPI: hns_dsaf_acpi_dsm_guid can be static
mmc: sdhci-pci: make guid intel_dsm_guid static
uuid: Take const on input of uuid_is_null() and guid_is_null()
thermal: int340x_thermal: fix compile after the UUID API switch
thermal: int340x_thermal: Switch to use new generic UUID API
acpi: always include uuid.h
ACPI: Switch to use generic guid_t in acpi_evaluate_dsm()
ACPI / extlog: Switch to use new generic UUID API
ACPI / bus: Switch to use new generic UUID API
ACPI / APEI: Switch to use new generic UUID API
acpi, nfit: Switch to use new generic UUID API
MAINTAINERS: add uuid entry
tmpfs: generate random sb->s_uuid
scsi_debug: switch to uuid_t
nvme: switch to uuid_t
sysctl: switch to use uuid_t
partitions/ldm: switch to use uuid_t
overlayfs: use uuid_t instead of uuid_be
fs: switch ->s_uuid to uuid_t
ima/policy: switch to use uuid_t
...
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Signed-off-by: Sylvain 'ythier' Hitier <sylvain.hitier@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull MIPS fixes from Ralf Baechle:
"Here's a final round of fixes for 4.12:
- Fix misordered instructions in assembly code making kenel startup
via UHB unreliable.
- Fix special case of MADDF and MADDF emulation.
- Fix alignment issue in address calculation in pm-cps on 64 bit.
- Fix IRQ tracing & lockdep when rescheduling
- Systems with MAARs require post-DMA cache flushes.
The reordering fix and the MADDF/MSUBF fix have sat in linux-next for
a number of days. The others haven't propagated from my pull tree to
linux-next yet but all have survived manual testing and Imagination's
automated test system and there are no pending bug reports"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: Avoid accidental raw backtrace
MIPS: Perform post-DMA cache flushes on systems with MAARs
MIPS: Fix IRQ tracing & lockdep when rescheduling
MIPS: pm-cps: Drop manual cache-line alignment of ready_count
MIPS: math-emu: Handle zero accumulator case in MADDF and MSUBF separately
MIPS: head: Reorder instructions missing a delay slot
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Pull ARM fix from Russell King:
"One final fix for 4.12 - Doug found a boot failure case triggered by
requesting a non-even MB vmalloc size"
* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: 8685/1: ensure memblock-limit is pmd-aligned
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CONFIG_REFCOUNT_FULL=y (correctly) does not provide a refcount_sub(),
which should not be part of proper refcount design patterns.
Remove the erroneous extern and the later !CONFIG_REFCOUNT_FULL
accidental implementation.
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Elena Reshetova <elena.reshetova@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 29dee3c03abc ("locking/refcounts: Out-of-line everything")
Link: http://lkml.kernel.org/r/20170701180129.GA17405@beast
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"Fixlets for x86:
- Prevent kexec crash when KASLR is enabled, which was caused by an
address calculation bug
- Restore the freeing of PUDs on memory hot remove
- Correct a negated pointer check in the intel uncore performance
monitoring driver
- Plug a memory leak in an error exit path in the RDT code"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/intel_rdt: Fix memory leak on mount failure
x86/boot/KASLR: Fix kexec crash due to 'virt_addr' calculation bug
x86/boot/KASLR: Add checking for the offset of kernel virtual address randomization
perf/x86/intel/uncore: Fix wrong box pointer check
x86/mm/hotplug: Fix BUG_ON() after hot-remove by not freeing PUD
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fix from Thomas Gleixner:
"The last fix for perf for this cycles:
- Prevent a segfault when kernel.kptr_restrict=2 is set by avoiding a
null pointer dereference"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf machine: Fix segfault for kernel.kptr_restrict=2
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pinctrl fix from Linus Walleij:
"Brian noticed that this regression has not got a proper fix for the
entire merge window and consequently we need to revert the offending
commit.
It's part of the RT-mainstream work, the dance goes like this, two
steps forward, one step back.
Summary:
- A last fix for v4.12, an IRQ problem reported early in the merge
window appears not to have been properly fixed, so the offending
commit will be reverted and we will find the proper fix for v4.13.
Hopefully"
* tag 'pinctrl-v4.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
Revert "pinctrl: rockchip: avoid hardirq-unsafe functions in irq_chip"
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull last minute fixes for GPIO from Linus Walleij:
- Fix another ACPI problem with broken BIOSes.
- Filter out the right GPIO events, making a very user-visible bug go
away.
* tag 'gpio-v4.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: acpi: Skip _AEI entries without a handler rather then aborting the scan
gpiolib: fix filtering out unwanted events
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git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
Intel PT enhancements:
- Support "ptwrite" instruction, a way to stuff 32 or 64 bit values into
the Intel PT trace (Adrian Hunter)
- Support power events in Intel PT to report changes to C-state (Adrian
Hunter)
- Synthesize Intel PT events as PERF_RECORD_SAMPLE records with a
perf_event_attr.type (PERF_TYPE_SYNTH) just after the range used by the
kernel, i.e. right after what is allocated for PMUs, at INT_MAX + 1U,
attr.config will have the identification for the synthesized event and
the PERF_SAMPLE_RAW payload will have its fields (Adrian Hunter)
Infrastructure changes:
- Remove warning() and error(), using instead pr_warning() and
pr_error(), consolidating error reporting (Arnaldo Carvalho de Melo)
- Add platform dependency to 'perf test 15' (Thomas Richter)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull last-minute tracing fixes from Steven Rostedt:
"Two fixes:
One is for a crash when using the :mod: trace probe command into
stack_trace_filter. This bug was introduced during the last merge
window.
The other was there forever. It's a small bug that makes it impossible
to name a module function for kprobes when the module starts with a
digit"
* tag 'trace-v4.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing/kprobes: Allow to create probe with a module name starting with a digit
ftrace: Fix regression with module command in stack_trace_filter
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uapi/linux/a.out.h uses a number of predefined macros that are
deprecated because they're in the application namespace
(e.g. '#ifdef linux' instead of '#ifdef __linux__').
This patch either corrects or just removes them if they are not
applicable to Linux.
The primary reason this is worth bothering to fix, considering how
obsolete a.out binary support is, is that the GCC build process
considers this such a severe error that it will copy the header into a
private directory and change the macro names, which causes future
updates to the header to be masked. This header probably doesn't get
updated very often anymore, but it is the _only_ uapi header that gets
this treatment, so IMHO it is worth patching just to drive that number
all the way to zero.
Signed-off-by: Zack Weinberg <zackw@panix.com>
[hch: removed dead conditionals]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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"in a rcu enabled hashtable" is repeated twice in a comment.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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If mount fails, the kn_info directory is not freed causing memory leak.
Add the missing error handling path.
Fixes: 4e978d06dedb ("x86/intel_rdt: Add "info" files to resctrl file system")
Signed-off-by: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: ravi.v.shankar@intel.com
Cc: tony.luck@intel.com
Cc: fenghua.yu@intel.com
Cc: peterz@infradead.org
Cc: vikas.shivappa@intel.com
Cc: andi.kleen@intel.com
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1498503368-20173-3-git-send-email-vikas.shivappa@linux.intel.com
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"Hopefully the last two powerpc fixes for 4.12.
The CXL one is larger than I'd usually send at rc7, but it fixes new
code this cycle, so better to have it working for the release. It was
actually sent a few weeks back but got blocked in testing behind
another fix that was causing issues.
We are still tracking one crash in v4.12-rc7, but only one person has
reproduced it and the commit identified by bisect doesn't touch any of
the relevant code, so I think it's 50/50 whether that commit is
actually the problem or it's some code layout / toolchain issue.
Two fixes for code we merged this cycle:
- cxl: Fixes for Coherent Accelerator Interface Architecture 2.0
- Avoid miscompilation w/GCC 4.6.3 on 32-bit - don't inline
copy_to/from_user()
Thanks to Al Viro, Larry Finger, Christophe Lombard"
* tag 'powerpc-4.12-8' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/32: Avoid miscompilation w/GCC 4.6.3 - don't inline copy_to/from_user()
cxl: Fixes for Coherent Accelerator Interface Architecture 2.0
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Previously, objtool ignored functions which have the IRET instruction
in them. That's because it assumed that such functions know what
they're doing with respect to frame pointers.
With the new "objtool 2.0" changes, it stopped ignoring such functions,
and started complaining about them:
arch/x86/kernel/alternative.o: warning: objtool: do_sync_core()+0x1b: unsupported instruction in callable function
arch/x86/kernel/alternative.o: warning: objtool: text_poke()+0x1a8: unsupported instruction in callable function
arch/x86/kernel/ftrace.o: warning: objtool: do_sync_core()+0x16: unsupported instruction in callable function
arch/x86/kernel/cpu/mcheck/mce.o: warning: objtool: machine_check_poll()+0x166: unsupported instruction in callable function
arch/x86/kernel/cpu/mcheck/mce.o: warning: objtool: do_machine_check()+0x147: unsupported instruction in callable function
Silence those warnings for now. They can be re-enabled later, once we
have unwind hints which will allow the code to annotate the IRET usages.
Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: live-patching@vger.kernel.org
Fixes: baa41469a7b9 ("objtool: Implement stack validation 2.0")
Link: http://lkml.kernel.org/r/20170630140934.mmwtpockvpupahro@treble
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fixes from Joerg Roedel:
"Two fixes:
- A fix for AMD IOMMU interrupt remapping code when IRQs are
forwarded directly to KVM guests
- Fixed check in the recently merged code to allow tboot with
Intel VT-d disabled"
* tag 'iommu-fixes-v4.12-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/amd: Fix interrupt remapping when disable guest_mode
iommu/vt-d: Correctly disable Intel IOMMU force on
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Two last-minute HD-audio fixes"
* tag 'sound-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - Fix endless loop of codec configure
ALSA: hda - set input_path bitmap to zero after moving it to new place
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git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
Pull overlayfs fixes from Miklos Szeredi:
"Fix two bugs in copy-up code. One introduced in 4.11 and one in
4.12-rc"
* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
ovl: don't set origin on broken lower hardlink
ovl: copy-up: don't unlock between lookup and link
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Do bitmap checks only when debug mode is enable. The line bitmap used
for mapping to physical addresses is fairly large (~512KB) and it is
expensive to do this checks on the fast path.
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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When a read is directed to the cache, we risk that the lba has been
updated during the time we made the L2P table lookup and the time we are
actually reading form the cache. We intentionally not hold the L2P lock
not to block other threads.
While strict ordering is not a guarantee at this level (unless REQ_FLUSH
has been previously issued), we have experience that some databases that
have recently implemented direct I/O support, issue metadata reads very
close to the writes, without issuing a fsync in the middle. An easy way
to support them while they is to make an extra effort and check the L2P
map right before reading the cache.
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Add a sanity check to the pblk initialization sequence in order to
ensure that enough LUNs have been allocated to store the line metadata.
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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When removing a pblk instance, pad the current line using asynchronous
I/O. This reduces the removal time from ~1 minute in the worst case to a
couple of seconds.
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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For now, we allocate a per I/O buffer for GC data. Since the potential
size of the buffer is 256KB and GC is not in the fast path, do this
allocation with vmalloc. This puts lets pressure on the memory
allocator at no performance cost.
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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