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Re: [PATCH v3 3/8] qcow2: Declare BDRV_REQ_NO_FALLBACK supported
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From: |
Alberto Garcia |
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Subject: |
Re: [PATCH v3 3/8] qcow2: Declare BDRV_REQ_NO_FALLBACK supported |
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Date: |
Mon, 25 Nov 2019 15:53:41 +0100 |
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User-agent: |
Notmuch/0.18.2 (http://notmuchmail.org) Emacs/24.4.1 (i586-pc-linux-gnu) |
On Fri 22 Nov 2019 05:05:06 PM CET, Kevin Wolf wrote:
> In the common case, qcow2_co_pwrite_zeroes() already only modifies
> metadata case, so we're fine with or without BDRV_REQ_NO_FALLBACK set.
>
> The only exception is when using an external data file, where the
> request is passed down to the block driver of the external data file. We
> are forwarding the BDRV_REQ_NO_FALLBACK flag there, though, so this is
> fine, too.
>
> Declare the flag supported therefore.
>
> Signed-off-by: Kevin Wolf <address@hidden>
Reviewed-by: Alberto Garcia <address@hidden>
Berto
- Re: [PATCH v3 2/8] block: Add no_fallback parameter to bdrv_co_truncate(), (continued)
- [PATCH v3 4/8] block: truncate: Don't make backing file data visible, Kevin Wolf, 2019/11/22
- [PATCH v3 3/8] qcow2: Declare BDRV_REQ_NO_FALLBACK supported, Kevin Wolf, 2019/11/22
- [PATCH v3 5/8] iotests: Add qemu_io_log(), Kevin Wolf, 2019/11/22
- [PATCH v3 6/8] iotests: Fix timeout in run_job(), Kevin Wolf, 2019/11/22
- [PATCH v3 7/8] iotests: Support job-complete in run_job(), Kevin Wolf, 2019/11/22
- [PATCH v3 8/8] iotests: Test committing to short backing file, Kevin Wolf, 2019/11/22
- Re: [PATCH for-4.2? v3 0/8] block: Fix resize (extending) of short overlays, Peter Maydell, 2019/11/22