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| author | Minchan Kim <minchan@kernel.org> | 2018-01-19 01:33:50 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-19 19:09:40 +0100 |
| commit | f80207727aaca3aa34a9cd80659393534de69cad (patch) | |
| tree | d9dc20d2ea690f091761bf6f5eed8d474f1f4857 /mm/page_owner.c | |
| parent | Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm (diff) | |
| download | linux-f80207727aaca3aa34a9cd80659393534de69cad.tar.xz linux-f80207727aaca3aa34a9cd80659393534de69cad.zip | |
mm/memory.c: release locked page in do_swap_page()
James reported a bug in swap paging-in from his testing. It is that
do_swap_page doesn't release locked page so system hang-up happens due
to a deadlock on PG_locked.
It was introduced by 0bcac06f27d7 ("mm, swap: skip swapcache for swapin
of synchronous device") because I missed swap cache hit places to update
swapcache variable to work well with other logics against swapcache in
do_swap_page.
This patch fixes it.
Debugged by James Bottomley.
Link: http://lkml.kernel.org/r/<1514407817.4169.4.camel@HansenPartnership.com>
Link: http://lkml.kernel.org/r/20180102235606.GA19438@bbox
Signed-off-by: Minchan Kim <minchan@kernel.org>
Reported-by: James Bottomley <James.Bottomley@hansenpartnership.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_owner.c')
0 files changed, 0 insertions, 0 deletions