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From: "Gregory Haskins" <ghaskins@novell.com>
To: "Peter Zijlstra" <peterz@infradead.org>
Cc: "Ingo Molnar" <mingo@elte.hu>, <linux-kernel@vger.kernel.org>,
	<linux-rt-users@vger.kernel.org>
Subject: Re: [PATCH 0/2][RFC] VFCIPI v3
Date: Tue, 31 Jul 2007 12:26:37 -0400	[thread overview]
Message-ID: <46AF2A1D.BA47.005A.0@novell.com> (raw)
In-Reply-To: <1185898941.12034.22.camel@twins>

>>> On Tue, Jul 31, 2007 at 12:22 PM, in message <1185898941.12034.22.camel@twins>,
Peter Zijlstra <peterz@infradead.org> wrote: 
> On Tue, 2007-07-31 at 12:14 -0400, Gregory Haskins wrote:
> 
>> Out of curiosity and for my own edification:  What *is* GFP_ATOMIC meant 
> for?
> 
> It is meant as you used it, _except_ for !PREEMPT_RT.
> 
> With PREEMPT_RT all allocators are fully preemptable, that is both the
> slab as well as the underlying page allocator.
> 
> Allocation from atomic context is a BUG() with -rt.

Thanks for the clarification!
-Greg


  reply	other threads:[~2007-07-31 16:26 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-07-31 13:24 [PATCH 0/2][RFC] VFCIPI v3 Gregory Haskins
2007-07-31 13:24 ` [PATCH 1/2] RT: Preemptible Function-Call-IPI Support Gregory Haskins
2007-07-31 13:24 ` [PATCH 2/2] RT: Add priority inheritance to the VFCIPI facility Gregory Haskins
2007-07-31 14:25 ` [PATCH 0/2][RFC] VFCIPI v3 Peter Zijlstra
2007-07-31 15:33   ` Gregory Haskins
2007-07-31 15:40     ` Peter Zijlstra
2007-07-31 16:14       ` Gregory Haskins
2007-07-31 16:22         ` Peter Zijlstra
2007-07-31 16:26           ` Gregory Haskins [this message]
2007-07-31 16:14       ` Gregory Haskins

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