svn commit: r270648 - in head/sys: kern sys
jhb at freebsd.org
Tue Aug 26 13:49:49 UTC 2014
On Tuesday, August 26, 2014 4:17:22 am Mateusz Guzik wrote:
> Author: mjg
> Date: Tue Aug 26 08:17:22 2014
> New Revision: 270648
> URL: http://svnweb.freebsd.org/changeset/base/270648
> Fix up races with f_seqcount handling.
> It was possible that the kernel would overwrite user-supplied hint.
> Abuse vnode lock for this purpose.
> In collaboration with: kib
> MFC after: 1 week
Do we care about this being correct enough to penalize reads by single-
threading them? This is just an optimization, if you lose the race it doesn't
actually break anything.
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