From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Oleg Nesterov <oleg@tv-sign.ru>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Thomas Gleixner <tglx@linutronix.de>,
Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>,
Steven Rostedt <rostedt@goodmis.org>,
Christoph Lameter <clameter@sgi.com>
Subject: Re: [PATCH -rt 5/5] slub: -rt port
Date: Sat, 14 Jul 2007 21:49:49 +0200 [thread overview]
Message-ID: <1184442589.5284.84.camel@lappy> (raw)
In-Reply-To: <20070714193817.GA108@tv-sign.ru>
On Sat, 2007-07-14 at 23:38 +0400, Oleg Nesterov wrote:
> On 07/14, Peter Zijlstra wrote:
> > Yeah, the function I copied this from: schedule_on_each_cpu() has a
> > comment to that effect.
>
> Just in case, schedule_on_each_cpu() ptotects cpu_online_map with
> preempt_disable(), its problem is quite different.
I was schedule_on_each_cpu_wq() I copied, and that does not disable
preemption. Also, I'm failing to see how schedule_on_each_cpu() could
work with -rt, since __queue_work() takes a regular spinlock.
> > Any ideas on how to solve this?
>
> Perhaps slab_cpuup_callback() can take flush_slab_mutex too, in that
> case cpu_online_map will be stable under flush_slab_mutex.
Right, I'll give that a try.
prev parent reply other threads:[~2007-07-14 19:50 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-14 17:57 [PATCH -rt 0/5] making SLUB -rt friendly Peter Zijlstra
2007-07-14 17:57 ` [PATCH -rt 1/5] workqueue: queue_work_cpu Peter Zijlstra
2007-07-14 17:14 ` Oleg Nesterov
2007-07-14 18:00 ` Peter Zijlstra
2007-07-14 17:57 ` [PATCH -rt 2/5] Thread Migration Preemption - v2 Peter Zijlstra
2007-07-14 16:49 ` Mathieu Desnoyers
2007-07-14 17:16 ` Oleg Nesterov
2007-07-14 17:34 ` Peter Zijlstra
2007-07-14 18:44 ` Peter Zijlstra
2007-07-14 19:07 ` Peter Zijlstra
2007-07-14 20:39 ` Mathieu Desnoyers
2007-07-14 20:48 ` Oleg Nesterov
2007-07-14 20:53 ` Peter Zijlstra
2007-07-14 17:57 ` [PATCH -rt 3/5] asm/local.h cmpxchg Peter Zijlstra
2007-07-14 16:52 ` Daniel Walker
2007-07-14 17:14 ` Mathieu Desnoyers
2007-07-14 17:31 ` Peter Zijlstra
2007-07-14 18:33 ` Mathieu Desnoyers
2007-07-14 17:57 ` [PATCH -rt 4/5] use migrate_disable for __local_begin Peter Zijlstra
2007-07-14 17:16 ` Mathieu Desnoyers
2007-07-14 17:32 ` Peter Zijlstra
2007-07-14 18:35 ` Mathieu Desnoyers
2007-07-14 18:41 ` Peter Zijlstra
2007-07-14 18:52 ` Mathieu Desnoyers
2007-07-14 17:57 ` [PATCH -rt 5/5] slub: -rt port Peter Zijlstra
2007-07-14 17:39 ` Oleg Nesterov
2007-07-14 17:50 ` Peter Zijlstra
2007-07-14 19:38 ` Oleg Nesterov
2007-07-14 19:49 ` Peter Zijlstra [this message]
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