From: Mike Snitzer <snitzer@redhat.com>
To: Busby <chaimvy@gmail.com>
Cc: device-mapper development <dm-devel@redhat.com>
Subject: Re: Does dm-thin support GC (garbage collection) ?
Date: Wed, 9 May 2012 09:47:11 -0400 [thread overview]
Message-ID: <20120509134710.GA25513@redhat.com> (raw)
In-Reply-To: <CAJv3x-WpO85tOG0Gt8ZS5JV9Z_81G4F=_gHzSjtroVogAtgm4A@mail.gmail.com>
On Wed, May 09 2012 at 2:03am -0400,
Busby <chaimvy@gmail.com> wrote:
> I created pool without ignore_discard feature, is this the way to
> enable discard? I mounted the ext4 with '--discard' args, I will trace
> whether the ext4 really issue discard later.
thin-pool's discard support (and discard passdown) are enabled by
default. But again, if the underlying storage doesn't support discards
you'll get this warning when you load the thin-pool's table:
device-mapper: thin: Discard unsupported by data device: Disabling discard passdown.
prev parent reply other threads:[~2012-05-09 13:47 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-07 7:28 Does dm-thin support GC (garbage collection) ? Busby
2012-05-07 13:22 ` Mike Snitzer
2012-05-08 5:01 ` Busby
2012-05-08 7:21 ` Busby
2012-05-08 10:30 ` Joe Thornber
2012-05-09 6:03 ` Busby
2012-05-09 13:47 ` Mike Snitzer [this message]
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