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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2021-06-17 00:22:28 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-18 23:49:07 +0300 |
| commit | 9620ad86d0e3e8fda4a23efc22e0b2ae4ded1105 (patch) | |
| tree | 3d79aa05ed9f88b8d5e52cd49de692233fae030b /arch/x86 | |
| parent | b1edae0d5f2e79e2bdc523c1459f8c52ad26485f (diff) | |
| download | linux-9620ad86d0e3e8fda4a23efc22e0b2ae4ded1105.tar.xz | |
afs: Re-enable freezing once a page fault is interrupted
If a task is killed during a page fault, it does not currently call
sb_end_pagefault(), which means that the filesystem cannot be frozen
at any time thereafter. This may be reported by lockdep like this:
====================================
WARNING: fsstress/10757 still has locks held!
5.13.0-rc4-build4+ #91 Not tainted
------------------------------------
1 lock held by fsstress/10757:
#0: ffff888104eac530
(
sb_pagefaults
as filesystem freezing is modelled as a lock.
Fix this by removing all the direct returns from within the function,
and using 'ret' to indicate whether we were interrupted or successful.
Fixes: 1cf7a1518aef ("afs: Implement shared-writeable mmap")
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-afs@lists.infradead.org
Link: https://lore.kernel.org/r/20210616154900.1958373-1-willy@infradead.org/
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86')
0 files changed, 0 insertions, 0 deletions