linux-kernel - Re: [PATCH v2] trace: Set __GFP_NORETRY flag for ring buffer allocating process

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Message-ID: <alpine.DEB.2.00.1106071929570.15402@chino.kir.corp.google.com>
Date:	Tue, 7 Jun 2011 19:30:40 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Vaibhav Nagarnaik <vnagarnaik@...gle.com>
cc:	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Michael Rubin <mrubin@...gle.com>,
	David Sharp <dhsharp@...gle.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] trace: Set __GFP_NORETRY flag for ring buffer allocating
 process

On Tue, 7 Jun 2011, Vaibhav Nagarnaik wrote:

> The tracing ring buffer is allocated from kernel memory. While
> allocating a large chunk of memory, OOM might happen which destabilizes
> the system. Thus random processes might get killed during the
> allocation.
> 
> This patch adds __GFP_NORETRY flag to the ring buffer allocation calls
> to make it fail more gracefully if the system will not be able to
> complete the allocation request.
> 
> Signed-off-by: Vaibhav Nagarnaik <vnagarnaik@...gle.com>

Acked-by: David Rientjes <rientjes@...gle.com>
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