Re: [PATCH] qemu-img convert: Don't pre-zero images

2020-06-22 Thread Eric Blake
On 6/22/20 10:12 AM, Kevin Wolf wrote: Since commit 5a37b60a61c, qemu-img create will pre-zero the target image if it isn't already zero-initialised (most importantly, for host block devices, but also iscsi etc.), so that writing explicit zeros wouldn't be necessary later. This could speed up th

Re: [PATCH] qemu-img convert: Don't pre-zero images

2020-06-22 Thread Nir Soffer
On Mon, Jun 22, 2020 at 6:12 PM Kevin Wolf wrote: > > Since commit 5a37b60a61c, qemu-img create will pre-zero the target image > if it isn't already zero-initialised (most importantly, for host block > devices, but also iscsi etc.), so that writing explicit zeros wouldn't > be necessary later. > >

[PATCH] qemu-img convert: Don't pre-zero images

2020-06-22 Thread Kevin Wolf
Since commit 5a37b60a61c, qemu-img create will pre-zero the target image if it isn't already zero-initialised (most importantly, for host block devices, but also iscsi etc.), so that writing explicit zeros wouldn't be necessary later. This could speed up the operation significantly, in particular