From: Tejun Heo <tj@kernel.org>
To: "Américo Wang" <xiyou.wangcong@gmail.com>
Cc: David Howells <dhowells@redhat.com>,
davem@davemloft.net, jens.axboe@oracle.com,
linux-kernel@vger.kernel.org, torvalds@osdl.org,
viro@ZenIV.linux.org.uk, akpm@linux-foundation.org
Subject: Re: [PATCH] fs: run emergency remount on dedicated workqueue
Date: Thu, 27 May 2010 19:03:11 +0200 [thread overview]
Message-ID: <4BFEA5CF.2070002@kernel.org> (raw)
In-Reply-To: <20100527145807.GB3600@hack>
On 05/27/2010 04:59 PM, Américo Wang wrote:
> 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()?
Umm... because it's called from interrupt handler? Right?
--
tejun
next prev parent reply other threads:[~2010-05-27 17:05 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-26 15:01 Change to invalidate_bdev() may break emergency remount R/O David Howells
2010-05-27 9:57 ` [PATCH] fs: run emergency remount on dedicated workqueue Tejun Heo
2010-05-27 14:59 ` Américo Wang
2010-05-27 17:03 ` Tejun Heo [this message]
2010-05-28 6:46 ` Américo Wang
2010-06-01 23:46 ` Andrew Morton
2010-06-01 23:57 ` Linus Torvalds
2010-06-02 0:13 ` Tejun Heo
2010-06-02 1:02 ` Dave Young
2010-06-02 1:57 ` Andrew Morton
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