From: Ralf Baechle <ralf@linux-mips.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Nick Piggin <npiggin@suse.de>,
Gregory Haskins <ghaskins@novell.com>,
mingo@elte.hu, srostedt@redhat.com, linux-kernel@vger.kernel.org,
linux-rt-users@vger.kernel.org, gregory.haskins@gmail.com,
Russell King <rmk+lkml@arm.linux.org.uk>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH v2 3/6] sched: make double-lock-balance fair
Date: Fri, 29 Aug 2008 13:49:16 +0100 [thread overview]
Message-ID: <20080829124916.GE16101@linux-mips.org> (raw)
In-Reply-To: <1219835224.6462.81.camel@twins>
On Wed, Aug 27, 2008 at 01:07:04PM +0200, Peter Zijlstra wrote:
> > BTW. I wonder about other architectures that are of interest to -rt? Like
> > mips or arm perhaps... Any plans to implement ticket locks on those, or
> > do they not tend to be used in SMP configurations on -rt yte?
>
> I think both are starting to show more and more SMP machines, so yes,
> eventually we'll want ticket locks for them too.
>
> That said, I'm not aware of anyone working on it - I suppose we could
> poke the regular arch maintainers.. Ralf, Russell ?
I looked into this a bit and we definately need it. One large MIPS user
already had converted his kernel to ticket locks due to an excessive
number of cacheline bounces having been observed.
Ralf
next prev parent reply other threads:[~2008-08-29 13:18 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-25 20:15 [PATCH 0/5] sched: misc rt fixes for tip/sched/devel Gregory Haskins
2008-08-25 20:15 ` [PATCH 1/5] sched: only try to push a task on wakeup if it is migratable Gregory Haskins
2008-08-25 20:15 ` [PATCH 2/5] sched: pull only one task during NEWIDLE balancing to limit critical section Gregory Haskins
2008-08-26 6:21 ` Nick Piggin
2008-08-26 11:36 ` Gregory Haskins
2008-08-27 6:41 ` Nick Piggin
2008-08-27 11:50 ` Gregory Haskins
2008-08-27 11:57 ` Nick Piggin
2008-08-25 20:15 ` [PATCH 3/5] sched: make double-lock-balance fair Gregory Haskins
2008-08-26 6:14 ` Nick Piggin
2008-08-26 12:23 ` Gregory Haskins
2008-08-27 6:36 ` Nick Piggin
2008-08-27 11:41 ` Gregory Haskins
2008-08-27 11:53 ` Nick Piggin
2008-08-27 12:10 ` Gregory Haskins
2008-08-25 20:15 ` [PATCH 4/5] sched: add sched_class->needs_post_schedule() member Gregory Haskins
2008-08-25 20:15 ` [PATCH 5/5] sched: create "pushable_tasks" list to limit pushing to one attempt Gregory Haskins
2008-08-26 17:34 ` [PATCH v2 0/6] Series short description Gregory Haskins
2008-08-26 17:34 ` [PATCH v2 1/6] sched: only try to push a task on wakeup if it is migratable Gregory Haskins
2008-08-26 17:34 ` [PATCH v2 2/6] sched: pull only one task during NEWIDLE balancing to limit critical section Gregory Haskins
2008-08-26 17:35 ` [PATCH v2 3/6] sched: make double-lock-balance fair Gregory Haskins
2008-08-27 8:21 ` Peter Zijlstra
2008-08-27 8:25 ` Peter Zijlstra
2008-08-27 10:26 ` Nick Piggin
2008-08-27 10:41 ` Peter Zijlstra
2008-08-27 10:56 ` Nick Piggin
2008-08-27 10:57 ` Nick Piggin
2008-08-27 12:03 ` Gregory Haskins
2008-08-27 11:07 ` Peter Zijlstra
2008-08-27 11:17 ` Russell King
2008-08-27 12:00 ` Gregory Haskins
2008-08-29 12:49 ` Ralf Baechle [this message]
2008-08-27 12:13 ` Gregory Haskins
2008-08-27 12:02 ` Gregory Haskins
2008-08-26 17:35 ` [PATCH v2 4/6] sched: add sched_class->needs_post_schedule() member Gregory Haskins
2008-08-26 17:35 ` [PATCH v2 5/6] plist: fix PLIST_NODE_INIT to work with debug enabled Gregory Haskins
2008-08-26 17:35 ` [PATCH v2 6/6] sched: create "pushable_tasks" list to limit pushing to one attempt Gregory Haskins
2008-08-29 13:24 ` Gregory Haskins
2008-08-26 18:16 ` [PATCH v2 0/6] sched: misc rt fixes for tip/sched/devel (was: Series short description) Gregory Haskins
2008-08-27 8:33 ` [PATCH v2 0/6] Series short description Peter Zijlstra
2008-09-04 12:54 ` [TIP/SCHED/DEVEL PATCH v3 0/6] sched: misc rt fixes Gregory Haskins
2008-09-04 12:55 ` [TIP/SCHED/DEVEL PATCH v3 1/6] sched: only try to push a task on wakeup if it is migratable Gregory Haskins
2008-09-04 12:55 ` [TIP/SCHED/DEVEL PATCH v3 2/6] sched: pull only one task during NEWIDLE balancing to limit critical section Gregory Haskins
2008-09-04 12:55 ` [TIP/SCHED/DEVEL PATCH v3 3/6] sched: make double-lock-balance fair Gregory Haskins
2008-09-04 12:55 ` [TIP/SCHED/DEVEL PATCH v3 4/6] sched: add sched_class->needs_post_schedule() member Gregory Haskins
2008-09-04 20:36 ` Steven Rostedt
2008-09-04 20:36 ` Gregory Haskins
2008-09-04 12:55 ` [TIP/SCHED/DEVEL PATCH v3 5/6] plist: fix PLIST_NODE_INIT to work with debug enabled Gregory Haskins
2008-09-04 12:55 ` [TIP/SCHED/DEVEL PATCH v3 6/6] sched: create "pushable_tasks" list to limit pushing to one attempt Gregory Haskins
2008-09-04 21:16 ` Steven Rostedt
2008-09-04 21:26 ` Gregory Haskins
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