Re: ipc,sem: sysv semaphore scalability

From: Peter Hurley
Date: Thu Mar 21 2013 - 17:50:20 EST

On Thu, 2013-03-21 at 14:10 -0700, Andrew Morton wrote:
> On Wed, 20 Mar 2013 15:55:30 -0400 Rik van Riel <riel@xxxxxxxxxxx> wrote:
> > This series makes the sysv semaphore code more scalable,
> > by reducing the time the semaphore lock is held, and making
> > the locking more scalable for semaphore arrays with multiple
> > semaphores.
> >
> > The first four patches were written by Davidlohr Buesso, and
> > reduce the hold time of the semaphore lock.
> >
> > The last three patches change the sysv semaphore code locking
> > to be more fine grained, providing a performance boost when
> > multiple semaphores in a semaphore array are being manipulated
> > simultaneously.
> These patches conflict pretty badly with Peter's:

On one point I'm a little confused: my series has been in linux-next for
a while. On what tree is this series based?

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