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https://github.com/torvalds/linux
23 October 2021, 00:29:24 UTC
Revision b2b80195d8829921506880f6dccd21cabd163d0d authored by Al Viro on 29 May 2014, 13:11:45 UTC, committed by Al Viro on 30 May 2014, 15:10:33 UTC 
dealing with the rest of shrink_dentry_list() livelock
 
We have the same problem with ->d_lock order in the inner loop, where
we are dropping references to ancestors.  Same solution, basically -
instead of using dentry_kill() we use lock_parent() (introduced in the
previous commit) to get that lock in a safe way, recheck ->d_count
(in case if lock_parent() has ended up dropping and retaking ->d_lock
and somebody managed to grab a reference during that window), trylock
the inode->i_lock and use __dentry_kill() to do the rest.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
1 parent 046b961
History
Tip revision: b2b80195d8829921506880f6dccd21cabd163d0d authored by Al Viro on 29 May 2014, 13:11:45 UTC
dealing with the rest of shrink_dentry_list() livelock
Tip revision: b2b8019
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