linux-kernel - Re: [PATCH] staging: zcache: fix cleancache crash

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Message-ID: <CAC9WiBjbWTRBkRN6pKSqJLVJXzcx89j7oFpCf0dzVeHAJM8zyw@mail.gmail.com>
Date:	Wed, 14 Sep 2011 11:26:42 +0200
From:	Francis Moreau <francis.moro@...il.com>
To:	Dan Magenheimer <dan.magenheimer@...cle.com>
Cc:	Seth Jennings <sjenning@...ux.vnet.ibm.com>, gregkh@...e.de,
	devel@...verdev.osuosl.org, linux-mm@...ck.org, ngupta@...are.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: zcache: fix cleancache crash

On Tue, Sep 13, 2011 at 10:56 PM, Dan Magenheimer
<dan.magenheimer@...cle.com> wrote:
>> From: Seth Jennings [mailto:sjenning@...ux.vnet.ibm.com]
>> Sent: Tuesday, September 13, 2011 1:19 PM
>> To: gregkh@...e.de
>> Cc: devel@...verdev.osuosl.org; linux-mm@...ck.org; ngupta@...are.org; linux-kernel@...r.kernel.org;
>> francis.moro@...il.com; Dan Magenheimer; Seth Jennings
>> Subject: [PATCH] staging: zcache: fix cleancache crash
>>
>> After commit, c5f5c4db, cleancache crashes on the first
>> successful get. This was caused by a remaining virt_to_page()
>> call in zcache_pampd_get_data_and_free() that only gets
>> run in the cleancache path.
>>
>> The patch converts the virt_to_page() to struct page
>> casting like was done for other instances in c5f5c4db.
>>
>> Based on 3.1-rc4
>>
>> Signed-off-by: Seth Jennings <sjenning@...ux.vnet.ibm.com>
>
> Yep, this appears to fix it!  Hopefully Francis can confirm.

Ok I can give this a try and let you know.

In the meantime, as I said to you privately, 3.1-rc3 doesn't have the
issue whereas 3.1-rc5 has.

Thanks
-- 
Francis
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