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Diffstat (limited to 'Documentation/ABI/obsolete/sysfs-class-dax')
| -rw-r--r-- | Documentation/ABI/obsolete/sysfs-class-dax | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/ABI/obsolete/sysfs-class-dax b/Documentation/ABI/obsolete/sysfs-class-dax new file mode 100644 index 000000000000..2cb9fc5e8bd1 --- /dev/null +++ b/Documentation/ABI/obsolete/sysfs-class-dax @@ -0,0 +1,22 @@ +What: /sys/class/dax/ +Date: May, 2016 +KernelVersion: v4.7 +Contact: linux-nvdimm@lists.01.org +Description: Device DAX is the device-centric analogue of Filesystem + DAX (CONFIG_FS_DAX). It allows memory ranges to be + allocated and mapped without need of an intervening file + system. Device DAX is strict, precise and predictable. + Specifically this interface: + + 1/ Guarantees fault granularity with respect to a given + page size (pte, pmd, or pud) set at configuration time. + + 2/ Enforces deterministic behavior by being strict about + what fault scenarios are supported. + + The /sys/class/dax/ interface enumerates all the + device-dax instances in the system. The ABI is + deprecated and will be removed after 2020. It is + replaced with the DAX bus interface /sys/bus/dax/ where + device-dax instances can be found under + /sys/bus/dax/devices/ |