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[Qemu-block] [PATCH 0/2] nbd: add zero-init parameter

From: Denis V. Lunev
Subject: [Qemu-block] [PATCH 0/2] nbd: add zero-init parameter
Date: Wed, 5 Oct 2016 12:33:06 +0300

When using a nbd block device, the info about necessity of prior disk
zeroing could significantly improve the speed of certain operations
(e.g. backups).

This patch also will allow to preserve QCOW2 images during migration.
Management software now may specify zero-init option and thus abscent
areas in the QCOW2 areas will not be marked as zeroes and will remain
empty. This is tight distiction but it is here.

Signed-off-by: Denis Plotnikov <address@hidden>
Signed-off-by: Denis V. Lunev <address@hidden>
CC: Paolo Bonzini <address@hidden>
CC: Kevin Wolf <address@hidden>
CC: Max Reitz <address@hidden>

Denis Plotnikov (2):
  nbd: change option parsing scheme
  nbd: add zero-init parameter

 block/nbd.c | 204 ++++++++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 184 insertions(+), 20 deletions(-)


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