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| author | Jan Kara <[email protected]> | 2019-02-01 22:21:23 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2019-02-01 23:46:24 +0000 |
| commit | c27d82f52f75fc9d8d9d40d120d2a96fdeeada5e (patch) | |
| tree | 0151720bb1ba96e8ce742674b96bef291b43fce5 /lib/xarray.c | |
| parent | mm: migrate: don't rely on __PageMovable() of newpage after unlocking it (diff) | |
| download | kernel-c27d82f52f75fc9d8d9d40d120d2a96fdeeada5e.tar.gz kernel-c27d82f52f75fc9d8d9d40d120d2a96fdeeada5e.zip | |
fs/drop_caches.c: avoid softlockups in drop_pagecache_sb()
When superblock has lots of inodes without any pagecache (like is the
case for /proc), drop_pagecache_sb() will iterate through all of them
without dropping sb->s_inode_list_lock which can lead to softlockups
(one of our customers hit this).
Fix the problem by going to the slow path and doing cond_resched() in
case the process needs rescheduling.
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Jan Kara <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Al Viro <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'lib/xarray.c')
0 files changed, 0 insertions, 0 deletions