From: Andrew Morton <akpm@osdl.org>
To: Ulrich Drepper <drepper@redhat.com>
Cc: inaky.perez-gonzalez@intel.com, linux-kernel@vger.kernel.org,
robustmutexes@lists.osdl.org, rusty@rustcorp.com.au,
mingo@elte.hu, jamie@shareable.org
Subject: Re: [RFC/PATCH] FUSYN Realtime & robust mutexes for Linux, v2.3.1
Date: Thu, 5 Aug 2004 00:17:37 -0700 [thread overview]
Message-ID: <20040805001737.78afb0d6.akpm@osdl.org> (raw)
In-Reply-To: <4111DC8C.7050504@redhat.com>
Ulrich Drepper <drepper@redhat.com> wrote:
>
> Andrew Morton wrote:
>
> > This fixes what appear to be some fairly significant shortcomings. What do
> > the futex and NPTL people have to say about the gravity of the problems
> > which this solves, and the offered implementation?
>
> This code will not be suppoerted by the glibc code. Using these
> primitives would mean significant slowdown of all operations and this
> for problems which only a few people have.
How large is the slowdown, and on what workloads?
> I asked to get the useful
> parts of the code to be made available using the current futex interface
> (robust mutexes are useful)
Passing the lock to a non-rt task when there's an rt-task waiting for it
seems pretty poor form, too.
next prev parent reply other threads:[~2004-08-05 7:19 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-04 9:13 Perez-Gonzalez, Inaky
2004-08-05 6:21 ` Andrew Morton
2004-08-05 7:06 ` Ulrich Drepper
2004-08-05 7:17 ` Andrew Morton [this message]
2004-08-05 7:37 ` Ulrich Drepper
2004-08-05 7:40 ` Andrew Morton
2004-08-05 8:22 ` Ulrich Drepper
2004-08-05 10:42 ` Ingo Molnar
2004-08-05 11:48 ` Rusty Russell
2004-08-05 13:23 ` Linh Dang
2004-08-05 13:26 ` Linh Dang
2004-08-05 14:02 ` Chris Friesen
2004-08-05 10:34 ` Ingo Molnar
2004-08-05 10:59 ` Ingo Molnar
2004-08-05 8:39 Eric Valette
2004-08-05 18:16 Perez-Gonzalez, Inaky
2004-08-05 18:16 Perez-Gonzalez, Inaky
2004-08-05 18:16 Perez-Gonzalez, Inaky
2004-08-05 18:22 Perez-Gonzalez, Inaky
2004-08-05 18:37 Perez-Gonzalez, Inaky
2004-08-05 18:39 Perez-Gonzalez, Inaky
2004-08-05 18:39 Perez-Gonzalez, Inaky
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