linux-kernel - Re: [stable] [PATCH] - fix oops in sysfs

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Message-ID: <465236EF.40102@redhat.com>
Date:	Mon, 21 May 2007 19:18:55 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Tejun Heo <htejun@...il.com>,
	Maneesh Soni <maneesh@...ibm.com>, stable@...nel.org
Subject: Re: [stable] [PATCH] - fix oops in sysfs_readdir

Andrew Morton wrote:
> On Mon, 21 May 2007 13:11:21 -0500
> Eric Sandeen <sandeen@...hat.com> wrote:
> 
>> This is a non-ida backport of Tejun's patch in -mm at:
>> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.22-rc1/2.6.22-rc1-mm1/broken-out/gregkh-driver-sysfs-allocate-inode-number-using-ida.patch
>> for the 2.6.16 -stable tree - it follows the same scheme of using s_ino to safely
>> store & retrieve the inode number of sysfs entries for use in sysfs_readdir,
>> but uses a brain-dead-simple inode nr allocator rather than ida, which would
>> bring along a lot of newer, more complex code.
>>
>> No, this doesn't guarantee uniqueness of sysfs inode numbers, but then
>> the code in -stable today doesn't either - and with this change, at least
>> it shouldn't oops.
> 
> So I'm sitting here whether to commend this patch to google kernel maintainers
> for 2.6.18 backport, but I realise I don't know what it does.  And I don't know
> if it fixes the reclaim-time oopses they were intermittently seeing, or if it
> fixes something else and if so what that is.
> 
> Sigh.  Better changelogs, please.
> 

Sorry Andrew.  I referenced Tejun's upstream patch in -mm which has a 
nice changelog etc, and this is a backport of that, and does the same 
thing in the same way and solves the same problem - but that doesn't 
help if you just want to toss this message into your patch stack.  Will 
fix up & resend.

-Eric

-Eric
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