https://github.com/torvalds/linux
Revision c27d82f52f75fc9d8d9d40d120d2a96fdeeada5e authored by Jan Kara on 01 February 2019, 22:21:23 UTC, committed by Linus Torvalds on 01 February 2019, 23:46:24 UTC
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/20190114085343.15011-1-jack@suse.cz Signed-off-by: Jan Kara <jack@suse.cz> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent e0a352f
Tip revision: c27d82f52f75fc9d8d9d40d120d2a96fdeeada5e authored by Jan Kara on 01 February 2019, 22:21:23 UTC
fs/drop_caches.c: avoid softlockups in drop_pagecache_sb()
fs/drop_caches.c: avoid softlockups in drop_pagecache_sb()
Tip revision: c27d82f
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