On 2/3/20 12:20 PM, Vladimir Sementsov-Ogievskiy wrote:
24.01.2020 13:34, David Edmondson wrote:
In many cases the target of a convert operation is a newly provisioned
target that the user knows is blank (filled with zeroes). In this
situation there is no requirement for qemu-img to wastefully zero out
the entire device.
Add a new option, --target-is-zero, allowing the user to indicate that
an existing target device is already zero filled.
Hi! qemu-img.c part looks OK for me, but other doesn't apply on master now.
Correct. Patch 2/2 is now obsolete and no longer necessary, and patch 1
needs some tweaks now that we don't have qemu-img.texi.
I like this thing, and I'd like to make similar option for backup job.
My followup patches to add an all-zero bit to qcow2 are also useful in
this regard.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3226
Virtualization: qemu.org | libvirt.org
