[dm-devel] [PATCH] deadlock with suspend and quotas

[Alasdair G Kergon]

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