linux-kernel - Re: [PATCH 0/2][RFC] VFCIPI v3

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Message-Id: <46AF2A1D.BA47.005A.0@novell.com>
Date:	Tue, 31 Jul 2007 12:26:37 -0400
From:	"Gregory Haskins" <ghaskins@...ell.com>
To:	"Peter Zijlstra" <peterz@...radead.org>
Cc:	"Ingo Molnar" <mingo@...e.hu>, <linux-kernel@...r.kernel.org>,
	<linux-rt-users@...r.kernel.org>
Subject: Re: [PATCH 0/2][RFC] VFCIPI v3

>>> On Tue, Jul 31, 2007 at 12:22 PM, in message <1185898941.12034.22.camel@...ns>,
Peter Zijlstra <peterz@...radead.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

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