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From: | Markus Armbruster |
Subject: | Re: [Qemu-devel] [RFC PATCHv2] block: optimize zero writes with bdrv_write_zeroes |
Date: | Wed, 26 Mar 2014 10:16:58 +0100 |
User-agent: | Gnus/5.13 (Gnus v5.13) Emacs/24.2 (gnu/linux) |
Peter Lieven <address@hidden> 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. [...]
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