linux-kernel - Re: [dm-devel] [PATCH] deadlock with suspend and quotas

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Message-ID: <20111129131811.GS7595@agk-dp.fab.redhat.com>
Date:	Tue, 29 Nov 2011 13:18:11 +0000
From:	Alasdair G Kergon <agk@...hat.com>
To:	Jan Kara <jack@...e.cz>
Cc:	Mikulas Patocka <mpatocka@...hat.com>, esandeen@...hat.com,
	Surbhi Palande <csurbhi@...il.com>,
	linux-kernel@...r.kernel.org, dm-devel@...hat.com,
	linux-fsdevel@...r.kernel.org,
	Christopher Chaltain <christopher.chaltain@...onical.com>,
	Valerie Aurora <val@...consulting.com>
Subject: Re: [dm-devel] [PATCH] deadlock with suspend and quotas

On Tue, Nov 29, 2011 at 02:09:13PM +0100, Jan Kara wrote:
>   Hmm, then why do these operations suspend the filesystem if they
> apparently don't need it? Sorry for my ignorance, I never seriously worked
> with LVM code...

They don't suspend it if they don't need to.

dm-ioctl.h:
/*
 * Set this to avoid attempting to freeze any filesystem when suspending.
 */
#define DM_SKIP_LOCKFS_FLAG     (1 << 10) /* In */

Alasdair
 
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