linux-kernel - Re: [PATCH] inotify: IN_DELETE events missing in -mm

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Message-ID: <1381955910743-738511.post@n7.nabble.com>
Date:	Wed, 16 Oct 2013 13:38:30 -0700 (PDT)
From:	Jim Mostek <jim.mostek@...ntum.com>
To:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] inotify: IN_DELETE events missing in -mm

You cannot move this line of code after dentry_iput(dentry); without
considerations for locking.

Another thread can get this dentry and be changing dentry->d_flags at the
same time!
We have hit this in testing. The code must be changed to have locks (if this
field needs to be changed or ...)

In our tests, the flag 0x10 in __d_drop goes missing because this line of
code executed at the same time on another processor.

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