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author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2020-06-02 07:46:58 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-02 20:59:07 +0300 |
commit | f2c817bed58d9be2051fad1d18e167e173c0c227 (patch) | |
tree | 445bd1c5a8a3639aa596ef6d4137ae44619a78c4 /include/acpi | |
parent | 2d8163e4899dad92175eedd1c2326c875eaa74fa (diff) | |
download | linux-f2c817bed58d9be2051fad1d18e167e173c0c227.tar.xz |
mm: use memalloc_nofs_save in readahead path
Ensure that memory allocations in the readahead path do not attempt to
reclaim file-backed pages, which could lead to a deadlock. It is
possible, though unlikely this is the root cause of a problem observed
by Cong Wang.
Reported-by: Cong Wang <xiyou.wangcong@gmail.com>
Suggested-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Cc: Chao Yu <yuchao0@huawei.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Gao Xiang <gaoxiang25@huawei.com>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: Miklos Szeredi <mszeredi@redhat.com>
Link: http://lkml.kernel.org/r/20200414150233.24495-16-willy@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/acpi')
0 files changed, 0 insertions, 0 deletions