Messages in this thread | | | Date | Fri, 13 Apr 2018 14:15:30 -0700 (PDT) | From | David Rientjes <> | Subject | Re: [PATCH] fs/dcache.c: re-add cond_resched() in shrink_dcache_parent() |
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On Fri, 13 Apr 2018, Khazhismel Kumykov wrote:
> shrink_dcache_parent may spin waiting for a parallel shrink_dentry_list. > In this case we may have 0 dentries to dispose, so we will never > schedule out while waiting for the parallel shrink_dentry_list to > complete. > > Tested that this fixes syzbot reports of stalls in shrink_dcache_parent() > > Fixes: 32785c0539b7 ("fs/dcache.c: add cond_resched() in shrink_dentry_list()") > Reported-by: syzbot+ae80b790eb412884ca77@syzkaller.appspotmail.com > > Cc: Nikolay Borisov <nborisov@suse.com> > Cc: Andrew Morton <akpm@linux-foundation.org> > Cc: David Rientjes <rientjes@google.com> > Cc: Alexander Viro <viro@zeniv.linux.org.uk> > Cc: Goldwyn Rodrigues <rgoldwyn@suse.de> > Cc: Jeff Mahoney <jeffm@suse.com> > Cc: Davidlohr Bueso <dave@stgolabs.net> > Cc: Linus Torvalds <torvalds@linux-foundation.org> > Signed-off-by: Khazhismel Kumykov <khazhy@google.com>
Acked-by: David Rientjes <rientjes@google.com>
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