https://github.com/torvalds/linux
Revision 81be24d263dbeddaba35827036d6f6787a59c2c3 authored by Al Viro on 03 June 2017, 06:20:09 UTC, committed by Al Viro on 15 June 2017, 10:52:09 UTC
It's not hard to trigger a bunch of d_invalidate() on the same
dentry in parallel.  They end up fighting each other - any
dentry picked for removal by one will be skipped by the rest
and we'll go for the next iteration through the entire
subtree, even if everything is being skipped.  Morevoer, we
immediately go back to scanning the subtree.  The only thing
we really need is to dissolve all mounts in the subtree and
as soon as we've nothing left to do, we can just unhash the
dentry and bugger off.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
1 parent 32c1431
History
Tip revision: 81be24d263dbeddaba35827036d6f6787a59c2c3 authored by Al Viro on 03 June 2017, 06:20:09 UTC
Hang/soft lockup in d_invalidate with simultaneous calls
Tip revision: 81be24d
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