linux-kernel - Re: [PATCH 3/8] ext3: remove lock/unlock super

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Message-ID: <502DE8E8.5080000@gmail.com>
Date:	Fri, 17 Aug 2012 08:47:04 +0200
From:	Marco Stornelli <marco.stornelli@...il.com>
To:	Theodore Ts'o <tytso@....edu>, Jan Kara <jack@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
	adilger.kernel@...ger.ca, dushistov@...l.ru
CC:	bharrosh@...asas.com, bhalevy@...ian.com,
	hirofumi@...l.parknet.co.jp, mikulas@...ax.karlin.mff.cuni.cz,
	Al Viro <viro@...IV.linux.org.uk>, hch@...radead.org,
	osd-dev@...n-osd.org, Linux Kernel <linux-kernel@...r.kernel.org>,
	linux-ext4@...r.kernel.org,
	Linux FS Devel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH 3/8] ext3: remove lock/unlock super

Il 16/08/2012 21:19, Theodore Ts'o ha scritto:
> On Thu, Aug 16, 2012 at 06:39:04PM +0200, Jan Kara wrote:
>> On Thu 16-08-12 12:00:26, Marco Stornelli wrote:
>>> From: Marco Stornelli <marco.stornelli@...il.com>
>>>
>>> Replaced lock and unlock super with a new fs mutex s_lock.
>>    Hum, is the lock needed at all? Remount & unfreeze both run with s_umount
>> held for writing. Thus we already have exclusion between these two calls.
>> The same seems to hold for ext4 BTW.
>
> Agreed, it's not clear lock_super() is needed at all for ext4 at this
> point.
>
> 	     	       		       	      - Ted
>

Great. I'll remove the calls for ext3/ext4 when I'll submit the second 
version of the patch.

Thanks for your feedback,

Marco
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