linux-kernel - Re: [PATCH 1/2] Btrfs: allocate extent state and check the result properly

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Message-ID: <4DACEA40.5020008@cn.fujitsu.com>
Date:	Tue, 19 Apr 2011 09:49:52 +0800
From:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
To:	Chris Mason <chris.mason@...cle.com>
CC:	LKML <linux-kernel@...r.kernel.org>,
	BTRFS <linux-btrfs@...r.kernel.org>
Subject: Re: [PATCH 1/2] Btrfs: allocate extent state and check the result
 properly

On 04/12/2011 04:14 PM, Xiao Guangrong wrote:
> It doesn't allocate extent_state and check the result properly:
> - in set_extent_bit, it doesn't allocate extent_state if the path is not
>   allowed wait
> 
> - in clear_extent_bit, it doesn't check the result after atomic-ly allocate,
>   we trigger BUG_ON() if it's fail
> 
> - if allocate fail, we trigger BUG_ON instead of returning -ENOMEM since
>   the return value of clear_extent_bit() is ignored by many callers
> 

Ping...to see what happened. :-)
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