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authorKevin Wolf <kwolf@redhat.com>2011-08-26 15:27:13 +0200
committerKevin Wolf <kwolf@redhat.com>2011-08-29 14:42:39 +0200
commita22f123ca3d3c09a77af4341ed1fbcc175b54f1d (patch)
treeb9992c37d4a4645e6282375c669ae1e771206a1c /poison.h
parentc488c7f649106d09df76f697adccbe6e72520b26 (diff)
qemu-img: Require larger zero areas for sparse handling
By default, require 4k of consecutive zero bytes for qemu-img to make the output file sparse by not issuing a write request for the zeroed parts. Add an -S option to allow users to tune this setting. This helps to avoid situations where a lot of zero sectors and data sectors are mixed and qemu-img tended to issue many tiny 512 byte writes. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'poison.h')
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