From: Markus Armbruster <armbru@redhat.com>
To: Peter Lieven <pl@kamp.de>
Cc: kwolf@redhat.com, famz@redhat.com, qemu-devel@nongnu.org,
mreitz@redhat.com, stefanha@redhat.com, pbonzini@redhat.com
Subject: Re: [Qemu-devel] [RFC PATCHv2] block: optimize zero writes with bdrv_write_zeroes
Date: Wed, 26 Mar 2014 10:16:58 +0100 [thread overview]
Message-ID: <87fvm5720l.fsf@blackfin.pond.sub.org> (raw)
In-Reply-To: <1395412589-30601-1-git-send-email-pl@kamp.de> (Peter Lieven's message of "Fri, 21 Mar 2014 15:36:29 +0100")
Peter Lieven <pl@kamp.de> writes:
> this patch tries to optimize zero write requests
> by automatically using bdrv_write_zeroes if it is
> supported by the format.
>
> this should significantly speed up file system initialization and
> should speed zero write test used to test backend storage performance.
>
> the difference can simply be tested by e.g.
>
> dd if=/dev/zero of=/dev/vdX bs=1M
Got actual numbers? Preferably for some operation that matters to
users.
[...]
next prev parent reply other threads:[~2014-03-26 9:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-21 14:36 [Qemu-devel] [RFC PATCHv2] block: optimize zero writes with bdrv_write_zeroes Peter Lieven
2014-03-21 14:50 ` Eric Blake
2014-03-21 20:20 ` Peter Lieven
2014-03-26 9:16 ` Markus Armbruster [this message]
2014-03-27 13:06 ` Peter Lieven
2014-03-27 14:07 ` Markus Armbruster
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