Commit 4180887f authored by Jiaqi Yan's avatar Jiaqi Yan Committed by Andrew Morton
Browse files

mm: memory-failure: document memory failure stats 

Add documentation for memory_failure's per NUMA node sysfs entries

Link: https://lkml.kernel.org/r/20230120034622.2698268-4-jiaqiyan@google.com


Signed-off-by: default avatarJiaqi Yan <jiaqiyan@google.com>
Acked-by: default avatarNaoya Horiguchi <naoya.horiguchi@nec.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Yang Shi <shy828301@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 18f41fa6

Documentation/ABI/stable/sysfs-devices-node

+39 −0
Original line number Diff line number Diff line
@@ -182,3 +182,42 @@ Date: November 2021 
Contact:	Jarkko Sakkinen <jarkko@kernel.org>

Description:

		The total amount of SGX physical memory in bytes.



What:		/sys/devices/system/node/nodeX/memory_failure/total

Date:		January 2023

Contact:	Jiaqi Yan <jiaqiyan@google.com>

Description:

		The total number of raw poisoned pages (pages containing

		corrupted data due to memory errors) on a NUMA node.



What:		/sys/devices/system/node/nodeX/memory_failure/ignored

Date:		January 2023

Contact:	Jiaqi Yan <jiaqiyan@google.com>

Description:

		Of the raw poisoned pages on a NUMA node, how many pages are

		ignored by memory error recovery attempt, usually because

		support for this type of pages is unavailable, and kernel

		gives up the recovery.



What:		/sys/devices/system/node/nodeX/memory_failure/failed

Date:		January 2023

Contact:	Jiaqi Yan <jiaqiyan@google.com>

Description:

		Of the raw poisoned pages on a NUMA node, how many pages are

		failed by memory error recovery attempt. This usually means

		a key recovery operation failed.



What:		/sys/devices/system/node/nodeX/memory_failure/delayed

Date:		January 2023

Contact:	Jiaqi Yan <jiaqiyan@google.com>

Description:

		Of the raw poisoned pages on a NUMA node, how many pages are

		delayed by memory error recovery attempt. Delayed poisoned

		pages usually will be retried by kernel.



What:		/sys/devices/system/node/nodeX/memory_failure/recovered

Date:		January 2023

Contact:	Jiaqi Yan <jiaqiyan@google.com>

Description:

		Of the raw poisoned pages on a NUMA node, how many pages are

		recovered by memory error recovery attempt.