diff options
| author | Tony Luck <tony.luck@intel.com> | 2017-09-25 16:39:37 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-09-27 12:10:11 +0200 |
| commit | cfd0f34e4cd5f1a5ad7000a3104c37886a70bca9 (patch) | |
| tree | 67630e185558f89048df72944bec18f9e591453b /arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | |
| parent | 94457b36e8a5026443707b48dcf54b204e098fd7 (diff) | |
x86/intel_rdt: Add diagnostics when making directories
Mostly this is about running out of RMIDs or CLOSIDs. Other
errors are various internal errors.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Vikas Shivappa <vikas.shivappa@intel.com>
Cc: Boris Petkov <bp@suse.de>
Cc: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lkml.kernel.org/r/027cf1ffb3a3695f2d54525813a1d644887353cf.1506382469.git.tony.luck@intel.com
Diffstat (limited to 'arch/x86/kernel/cpu/intel_rdt_rdtgroup.c')
| -rw-r--r-- | arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c index 6e0ee7ca1490..abd220bf6cd7 100644 --- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c +++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c @@ -1593,8 +1593,10 @@ static int mkdir_rdt_prepare(struct kernfs_node *parent_kn, int ret; prdtgrp = rdtgroup_kn_lock_live(prgrp_kn); + rdt_last_cmd_clear(); if (!prdtgrp) { ret = -ENODEV; + rdt_last_cmd_puts("directory was removed\n"); goto out_unlock; } @@ -1602,6 +1604,7 @@ static int mkdir_rdt_prepare(struct kernfs_node *parent_kn, rdtgrp = kzalloc(sizeof(*rdtgrp), GFP_KERNEL); if (!rdtgrp) { ret = -ENOSPC; + rdt_last_cmd_puts("kernel out of memory\n"); goto out_unlock; } *r = rdtgrp; @@ -1613,6 +1616,7 @@ static int mkdir_rdt_prepare(struct kernfs_node *parent_kn, kn = kernfs_create_dir(parent_kn, name, mode, rdtgrp); if (IS_ERR(kn)) { ret = PTR_ERR(kn); + rdt_last_cmd_puts("kernfs create error\n"); goto out_free_rgrp; } rdtgrp->kn = kn; @@ -1626,24 +1630,32 @@ static int mkdir_rdt_prepare(struct kernfs_node *parent_kn, kernfs_get(kn); ret = rdtgroup_kn_set_ugid(kn); - if (ret) + if (ret) { + rdt_last_cmd_puts("kernfs perm error\n"); goto out_destroy; + } files = RFTYPE_BASE | RFTYPE_CTRL; files = RFTYPE_BASE | BIT(RF_CTRLSHIFT + rtype); ret = rdtgroup_add_files(kn, files); - if (ret) + if (ret) { + rdt_last_cmd_puts("kernfs fill error\n"); goto out_destroy; + } if (rdt_mon_capable) { ret = alloc_rmid(); - if (ret < 0) + if (ret < 0) { + rdt_last_cmd_puts("out of RMIDs\n"); goto out_destroy; + } rdtgrp->mon.rmid = ret; ret = mkdir_mondata_all(kn, rdtgrp, &rdtgrp->mon.mon_data_kn); - if (ret) + if (ret) { + rdt_last_cmd_puts("kernfs subdir error\n"); goto out_idfree; + } } kernfs_activate(kn); @@ -1721,8 +1733,10 @@ static int rdtgroup_mkdir_ctrl_mon(struct kernfs_node *parent_kn, kn = rdtgrp->kn; ret = closid_alloc(); - if (ret < 0) + if (ret < 0) { + rdt_last_cmd_puts("out of CLOSIDs\n"); goto out_common_fail; + } closid = ret; rdtgrp->closid = closid; @@ -1734,8 +1748,10 @@ static int rdtgroup_mkdir_ctrl_mon(struct kernfs_node *parent_kn, * of tasks and cpus to monitor. */ ret = mongroup_create_dir(kn, NULL, "mon_groups", NULL); - if (ret) + if (ret) { + rdt_last_cmd_puts("kernfs subdir error\n"); goto out_id_free; + } } goto out_unlock; |