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mm: memory-failure: document memory failure stats

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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: Jiaqi Yan <jiaqiyan@google.com>
Acked-by: Naoya 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: Andrew Morton <akpm@linux-foundation.org>
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Jiaqi Yan 2023-01-20 03:46:22 +00:00 committed by Andrew Morton
parent 18f41fa616
commit 4180887f06
1 changed files with 39 additions and 0 deletions
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39
Documentation/ABI/stable/sysfs-devices-node
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@ -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.