linux-kernel - Re: [PATCH] fs: run emergency remount on dedicated workqueue

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Message-ID: <20100527145807.GB3600@hack>
Date:	Thu, 27 May 2010 22:59:11 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	David Howells <dhowells@...hat.com>, davem@...emloft.net,
	jens.axboe@...cle.com, linux-kernel@...r.kernel.org,
	torvalds@...l.org, viro@...IV.linux.org.uk,
	akpm@...ux-foundation.org
Subject: Re: [PATCH] fs: run emergency remount on dedicated workqueue

On Thu, May 27, 2010 at 11:57:23AM +0200, Tejun Heo wrote:
>Commit fa4b9074cd8428958c2adf9dc0c831f46e27c193 made s_umount depend
>on keventd; however, emergency remount schedules works to keventd
>which grabs s_umount creating a circular dependency.  Run emergency
>remount on a separate workqueue to break it.
>


I have a stupid question, why using workqueue instead of
calling do_remount_sb() directly in emergency_remount()?
Avoid blocking emergency_remount()?

Thanks.

-- 
Live like a child, think like the god.
 
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