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From: "Denis V. Lunev" <den@openvz.org>
Date: Fri, 26 Dec 2014 15:35:06 +0300
Message-Id: <1419597313-20514-1-git-send-email-den@openvz.org>
Subject: [Qemu-devel] [PATCH v2 0/7] eliminate data write in
	bdrv_write_zeroes on Linux
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Cc: Kevin Wolf <kwolf@redhat.com>, "Denis V. Lunev" <den@openvz.org>, qemu-devel@nongnu.org, Stefan Hajnoczi <stefanha@redhat.com>

These patches eliminate data writes completely on Linux if fallocate
FALLOC_FL_ZERO_RANGE or FALLOC_FL_PUNCH_HOLE are  supported on
underlying filesystem.

This should seriously increase performance in some special cases.

Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Kevin Wolf <kwolf@redhat.com>
CC: Stefan Hajnoczi <stefanha@redhat.com>