linux-kernel - Re: [dm-devel] dm-cache not writing out cache metadata at reboot?

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Message-ID: <20130510100520.GD20880@debian>
Date:	Fri, 10 May 2013 11:05:21 +0100
From:	Joe Thornber <thornber@...hat.com>
To:	device-mapper development <dm-devel@...hat.com>
Cc:	"Darrick J. Wong" <darrick.wong@...cle.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [dm-devel] dm-cache not writing out cache metadata at reboot?

On Wed, May 08, 2013 at 06:05:26PM -0400, Mike Snitzer wrote:
> I'll defer to Joe on this but I think sync_metadata() is pretty heavy to
> be doing every 'dmsetup info'.  BTW, with just dm_cache_commit() the
> superblock fields aren't stale; only the on-disk hints are.

Agreed, the hints are v. expensive to write.

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