linux-kernel - Re: [PATCH] trace: don't call page_to

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Message-ID: <1348148514.13080.61.camel@gandalf.local.home>
Date:	Thu, 20 Sep 2012 09:41:54 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Minchan Kim <minchan@...nel.org>
Cc:	Wen Congyang <wency@...fujitsu.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	khlebnikov@...nvz.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	stable <stable@...r.kernel.org>
Subject: Re: [PATCH] trace: don't call page_to_pfn() if page is NULL

On Thu, 2012-09-20 at 15:28 +0900, Minchan Kim wrote:
> On Thu, Sep 20, 2012 at 02:04:47PM +0800, Wen Congyang wrote:
> > When allocating memory fails, page is NULL. page_to_pfn() will
> > cause the kernel panicked if we don't use sparsemem vmemmap.
> > 
> > Signed-off-by: Wen Congyang <wency@...fujitsu.com>
> 
> Nice catch.
> I think it's a candidate of stable.

Yeah, and it looks like it can go against all stable kernels as it was
introduced back in 2.6.32. I'll apply and start testing it.

Thanks,

-- Steve

> 
> Reviewed-by: Minchan Kim <minchan@...nel.org>
> 


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