From: Ulrich Drepper <drepper@redhat.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Pierre Peiffer <pierre.peiffer@bull.net>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Dave Jones <davej@redhat.com>, Ingo Molnar <mingo@elte.hu>
Subject: Re: FUTEX_CMP_REQUEUE_PI is not quite there
Date: Fri, 11 May 2007 23:29:08 -0700 [thread overview]
Message-ID: <46455EB4.901@redhat.com> (raw)
In-Reply-To: <20070511231931.52d963ab.akpm@linux-foundation.org>
Andrew Morton wrote:
> Well yup. We're kind of waiting for someone to reply
> to http://lkml.org/lkml/2007/5/7/129
Seems to be the same or at least related.
On comment about my first mail: this is the correct code of condvars,
despite what I wrote before. I wasn't thinking clear. The internal
futex is a normal futex. It is the job of the CMP_REQUEUE_PI call to
figure this out, select the waiter with the highest priority, and boost
the priority if necessary based on the targer futex which always is a PI
futex.
--
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
next prev parent reply other threads:[~2007-05-12 6:29 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-12 6:10 FUTEX_CMP_REQUEUE_PI is not quite there Ulrich Drepper
2007-05-12 6:19 ` Andrew Morton
2007-05-12 6:29 ` Ulrich Drepper [this message]
2007-06-05 16:58 ` Thomas Gleixner
2007-06-09 18:01 ` Ulrich Drepper
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