From: Kevin Wolf <kwolf@redhat.com>
To: Eric Blake <eblake@redhat.com>
Cc: qemu-devel@nongnu.org, qemu-block@nongnu.org,
Max Reitz <mreitz@redhat.com>
Subject: Re: [Qemu-devel] [PATCH 06/13] qcow2: Convert to bdrv_co_pwrite_zeroes()
Date: Wed, 25 May 2016 15:53:51 +0200 [thread overview]
Message-ID: <20160525135351.GI4815@noname.redhat.com> (raw)
In-Reply-To: <1464128732-12667-7-git-send-email-eblake@redhat.com>
Am 25.05.2016 um 00:25 hat Eric Blake geschrieben:
> Another step on our continuing quest to switch to byte-based
> interfaces.
>
> There are still opportunities to optimize the qcow2 handling
> of zero clusters. For example, if the backing file only has
> non-zero data in the portion about to be overwritten, then
> we could widen the request and make the entire cluster zero,
> rather than falling back to -ENOTSUP. But for this patch,
> intentionally leave the semantics unchanged, even if not
> optimal.
>
> Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
next prev parent reply other threads:[~2016-05-25 13:54 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-24 22:25 [Qemu-devel] [PATCH 00/13] Kill sector-based write_zeroes Eric Blake
2016-05-24 22:25 ` [Qemu-devel] [PATCH 01/13] block: Rename blk_write_zeroes() Eric Blake
2016-05-24 22:25 ` [Qemu-devel] [PATCH 02/13] block: Track write zero limits in bytes Eric Blake
2016-05-25 10:30 ` Kevin Wolf
2016-05-25 11:21 ` Eric Blake
2016-05-24 22:25 ` [Qemu-devel] [PATCH 03/13] block: Add .bdrv_co_pwrite_zeroes() Eric Blake
2016-05-25 13:02 ` Kevin Wolf
2016-05-24 22:25 ` [Qemu-devel] [PATCH 04/13] block: Switch bdrv_write_zeroes() to byte interface Eric Blake
2016-05-25 13:18 ` Kevin Wolf
2016-05-24 22:25 ` [Qemu-devel] [PATCH 05/13] iscsi: Convert to bdrv_co_pwrite_zeroes() Eric Blake
2016-05-25 13:34 ` Kevin Wolf
2016-06-01 16:33 ` Eric Blake
2016-05-24 22:25 ` [Qemu-devel] [PATCH 06/13] qcow2: " Eric Blake
2016-05-25 13:53 ` Kevin Wolf [this message]
2016-05-24 22:25 ` [Qemu-devel] [PATCH 07/13] blkreplay: " Eric Blake
2016-05-25 13:54 ` Kevin Wolf
2016-05-24 22:25 ` [Qemu-devel] [PATCH 08/13] gluster: " Eric Blake
2016-05-25 13:57 ` Kevin Wolf
2016-05-24 22:25 ` [Qemu-devel] [PATCH 09/13] qed: " Eric Blake
2016-05-25 14:07 ` Kevin Wolf
2016-05-25 14:28 ` Eric Blake
2016-05-25 15:06 ` Kevin Wolf
2016-05-24 22:25 ` [Qemu-devel] [PATCH 10/13] raw-posix: " Eric Blake
2016-05-25 14:20 ` Kevin Wolf
2016-05-24 22:25 ` [Qemu-devel] [PATCH 11/13] raw_bsd: " Eric Blake
2016-05-25 14:20 ` Kevin Wolf
2016-05-24 22:25 ` [Qemu-devel] [PATCH 12/13] vmdk: " Eric Blake
2016-05-25 14:23 ` Kevin Wolf
2016-05-25 14:35 ` Eric Blake
2016-05-24 22:25 ` [Qemu-devel] [PATCH 13/13] block: Kill bdrv_co_write_zeroes() Eric Blake
2016-05-25 14:24 ` Kevin Wolf
2016-05-25 11:02 ` [Qemu-devel] [PATCH 00/13] Kill sector-based write_zeroes Kevin Wolf
2016-06-01 15:35 ` Kevin Wolf
2016-06-01 15:38 ` Eric Blake
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