linux-kernel - Re: [PATCH] fs: Make sure data stored into inode is properly seen before unlocking new inode

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Date:	Tue, 8 Sep 2009 14:42:29 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Jan Kara <jack@...e.cz>
Cc:	LKML <linux-kernel@...r.kernel.org>, linux-fsdevel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>, hch@...radead.org
Subject: Re: [PATCH] fs: Make sure data stored into inode is properly seen
	before unlocking new inode

On Tue, Sep 08, 2009 at 01:41:03PM +0200, Jan Kara wrote:
> In theory it could happen that on one CPU we initialize a new inode but clearing
> of I_NEW | I_LOCK gets reordered before some of the initialization. Thus on
> another CPU we return not fully uptodate inode from iget_locked().
> 
> This seems to fix a corruption issue on ext3 mounted over NFS.
> 
> Signed-off-by: Jan Kara <jack@...e.cz>

Looks good to me.  Impressive that this causes real life issues.

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