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| author | Joao Martins <joao.m.martins@oracle.com> | 2022-01-29 13:41:01 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-01-30 09:56:58 +0200 |
| commit | 61e28cf0543c7d8e6ef88c3c305f727c5a21ba5b (patch) | |
| tree | 716d66f5994a5aebb182f1a04d1f50175995726a /include | |
| parent | dbecf9b8b8ce580f4e11afed9d61e8aa294cddd2 (diff) | |
| download | linux-stable-61e28cf0543c7d8e6ef88c3c305f727c5a21ba5b.tar.gz linux-stable-61e28cf0543c7d8e6ef88c3c305f727c5a21ba5b.tar.bz2 linux-stable-61e28cf0543c7d8e6ef88c3c305f727c5a21ba5b.zip | |
memory-failure: fetch compound_head after pgmap_pfn_valid()
memory_failure_dev_pagemap() at the moment assumes base pages (e.g.
dax_lock_page()). For devmap with compound pages fetch the
compound_head in case a tail page memory failure is being handled.
Currently this is a nop, but in the advent of compound pages in
dev_pagemap it allows memory_failure_dev_pagemap() to keep working.
Without this fix memory-failure handling (i.e. MCEs on pmem) with
device-dax configured namespaces will regress (and crash).
Link: https://lkml.kernel.org/r/20211202204422.26777-2-joao.m.martins@oracle.com
Reported-by: Jane Chu <jane.chu@oracle.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions