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authorMiaohe Lin <linmiaohe@huawei.com>2022-03-23 00:44:50 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-03-23 01:57:07 +0300
commitbf6445bc8f778590ac754b06a8fe82ce5a9f818a (patch)
tree82281f9f7d16d986d8ddf9a926d52455ecedb5d9 /security/apparmor
parent593396b86ef6f79c71e09c183eae28040ccfeedf (diff)
downloadlinux-bf6445bc8f778590ac754b06a8fe82ce5a9f818a.tar.xz
mm/memory-failure.c: make non-LRU movable pages unhandlable
We can not really handle non-LRU movable pages in memory failure. Typically they are balloon, zsmalloc, etc. Assuming we run into a base (4K) non-LRU movable page, we could reach as far as identify_page_state(), it should not fall into any category except me_unknown. For the non-LRU compound movable pages, they could be taken for transhuge pages but it's unexpected to split non-LRU movable pages using split_huge_page_to_list in memory_failure. So we could just simply make non-LRU movable pages unhandlable to avoid these possible nasty cases. Link: https://lkml.kernel.org/r/20220312074613.4798-4-linmiaohe@huawei.com Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Suggested-by: Yang Shi <shy828301@gmail.com> Reviewed-by: Yang Shi <shy828301@gmail.com> Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Tony Luck <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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