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Subject: Re: [PATCH 0/6] ipc/sem.c: performance improvements, FIFO
From: Mike Galbraith <efault@gmx.de>
To: Manfred Spraul <manfred@colorfullife.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Rik van Riel <riel@redhat.com>,
        Davidlohr Bueso <davidlohr.bueso@hp.com>, hhuang@redhat.com,
        Linus Torvalds <torvalds@linux-foundation.org>
Date: Tue, 18 Jun 2013 09:14:12 +0200
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On Tue, 2013-06-18 at 08:48 +0200, Mike Galbraith wrote: 
> On Sat, 2013-06-15 at 13:10 +0200, Manfred Spraul wrote: 

P.S.

> > My current guess:
> > sem_lock() somehow ends up in lock_array.

Tracing shows that happens precisely one time, at end of benchmark.

-Mike