linux-kernel - Re: [bisected commit 0fc9d10] NFS-server corruption with 3.4

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Date:	Tue, 05 Jun 2012 20:39:13 +0400
From:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
To:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
CC:	Ondrej Zary <linux@...nbow-software.org>,
	Hugh Dickins <hughd@...gle.com>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	Dave Jones <davej@...hat.com>,
	Hans de Bruin <jmdebruin@...net.nl>,
	Linux NFS mailing list <linux-nfs@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Toralf Förster 
	<toralf.foerster@....de>,
	richard -rw- weinberger <richard.weinberger@...il.com>
Subject: Re: [bisected commit 0fc9d10] NFS-server corruption with 3.4

OGAWA Hirofumi wrote:
> Konstantin Khlebnikov<khlebnikov@...nvz.org>  writes:
>
>> Proper fix in attachment.
>
> Maybe, you are going to add the stable tag for next stable?
>
> Thanks.

Yes, this definitely must be in next stable 3.4.x , but first I'll wait for confirmation.

Guys, who can reproduce this, please check patch "radix-tree: fix contiguous iterator"
from my previous mail in this thread.

>
>> radix-tree: fix contiguous iterator
>>
>> From: Konstantin Khlebnikov<khlebnikov@...nvz.org>
>>
>> This patch fixes bug in macro radix_tree_for_each_contig().
>> If radix_tree_next_slot() sees NULL in next slot it returns NULL, but following
>> radix_tree_next_chunk() switches iterating into next chunk. As result iterating
>> becomes non-contiguous and breaks vfs "splice" and all its users.
>

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