From: Mike Snitzer <snitzer@redhat.com>
To: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] Trim support on stripped volumes ?
Date: Wed, 25 May 2011 09:23:02 -0400 [thread overview]
Message-ID: <20110525132301.GD10145@redhat.com> (raw)
In-Reply-To: <1306311098.3911.5.camel@franck-VPCCW2S1E>
On Wed, May 25 2011 at 4:11am -0400,
Franck Routier (personnel) <alci@mecadu.org> wrote:
> Le mardi 24 mai 2011 � 09:14 -0400, Mike Snitzer a �crit :
>
> > When using -o discard, ext4 will log a warning if a discard failed (and
> > will disable discards).
> >
> > So ext4 is a great indicator for whether discards are working on your
> > striped LV volume.
> >
>
> Just out of curiosity, how does ext4 tell if discards is working or
> not ?
It checks the return code from ext4_issue_discard() -- which comes from
sb_issue_discard(). See: fs/ext4/mballoc.c:release_blocks_on_commit()
prev parent reply other threads:[~2011-05-25 13:23 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-24 9:20 [linux-lvm] Trim support on stripped volumes ? Franck Routier (personnel)
2011-05-24 9:51 ` Franck Routier (personnel)
2011-05-24 13:14 ` Mike Snitzer
2011-05-25 8:11 ` Franck Routier (personnel)
2011-05-25 13:23 ` Mike Snitzer [this message]
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