Re: [PATCH 0/9] More truncate improvements

[Eric Blake]

On 4/28/20 3:28 PM, Eric Blake wrote:
> Based-on: <address@hidden>
> [PATCH v7 00/10] block: Fix resize (extending) of short overlays
>
> After reviewing Kevin's work, I questioned if we had a redundancy with
> bdrv_has_zero_init_truncate.  It turns out we do, and this is the result.
>
> Patch 1 has been previously posted [1] and reviewed, the rest is new.
> I did not address Neils' comment that modern gluster also always
> 0-initializes [2], as I am not set up to verify it (my changes to the
> other drivers are semantic no-ops, so I don't feel as bad about
> posting them with less rigourous testing).
>
> [1] https://lists.gnu.org/archive/html/qemu-devel/2020-01/msg08070.html
> [2] https://lists.gnu.org/archive/html/qemu-devel/2020-02/msg04266.html
>
> Eric Blake (9):
>    gluster: Drop useless has_zero_init callback
>    file-win32: Support BDRV_REQ_ZERO_WRITE for truncate
>    nfs: Support BDRV_REQ_ZERO_WRITE for truncate
>    rbd: Support BDRV_REQ_ZERO_WRITE for truncate
>    sheepdog: Support BDRV_REQ_ZERO_WRITE for truncate
>    ssh: Support BDRV_REQ_ZERO_WRITE for truncate
>    parallels: Rework truncation logic
>    vhdx: Rework truncation logic
>    block: Drop unused .bdrv_has_zero_init_truncate

Ping.

--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org