linux-ext4 - Re: [PATCH 2/8] exofs: remove lock/unlock super

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Date:	Thu, 16 Aug 2012 16:10:11 +0300
From:	Artem Bityutskiy <dedekind1@...il.com>
To:	Boaz Harrosh <bharrosh@...asas.com>
Cc:	Marco Stornelli <marco.stornelli@...il.com>, bhalevy@...ian.com,
	jack@...e.cz, Andrew Morton <akpm@...ux-foundation.org>,
	adilger.kernel@...ger.ca, tytso@....edu,
	hirofumi@...l.parknet.co.jp, mikulas@...ax.karlin.mff.cuni.cz,
	Al Viro <viro@...IV.linux.org.uk>, hch@...radead.org,
	dushistov@...l.ru, 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 2/8] exofs: remove lock/unlock super

On Thu, 2012-08-16 at 15:32 +0300, Boaz Harrosh wrote:
> On 08/16/2012 03:20 PM, Artem Bityutskiy wrote:
> 
> > On Thu, 2012-08-16 at 12:00 +0200, Marco Stornelli wrote:
> >> From: Marco Stornelli <marco.stornelli@...il.com>
> >>
> >> Remove lock and unlock super operation.
> >>
> >> Signed-off-by: Marco Stornelli <marco.stornelli@...il.com>
> > 
> > Acked-by: Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>
> > 
> 
> 
> Are you sure? It used to be that exofs_sync_fs() could be called
> concurrently.
> 
> What about two "bash -c sync" calls or a sync and an unmount
> in parallel. anything protecting that?
> 
> If so then sure, but please let me test first.

Umm, actually we will probably end up writing the same twice without the
lock. 

-- 
Best Regards,
Artem Bityutskiy

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