Messages in this thread | | | Date | Thu, 30 Jul 2015 13:04:58 +0300 | Subject | Re: [PATCH] proc: change proc_subdir_lock to a rwlock | From | Alexey Dobriyan <> |
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On Thu, Jul 30, 2015 at 1:21 AM, Eric W. Biederman <ebiederm@xmission.com> wrote: > Two quick questions. > > - What motivates this work? Are you seeing lots of > parallel reads on proc?
Well, yes, benchmark looks like very synthetic. But even gcc opens /proc/meminfo, so might as well apply the change.
Patch looks like obviously correct to me.
> - Why not rcu? Additions and removal of proc generic > files is very rare. Conversion to rcu for reads should > perform better and not take much more work.
If you want proc locking to be understood by ~10 people on the planet then yes, there is RCU. :-)
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