From: Max Reitz <mreitz@redhat.com>
To: Kevin Wolf <kwolf@redhat.com>, qemu-block@nongnu.org
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH v2 17/20] qemu-io: Use bdrv_parse_cache_mode() in reopen_f()
Date: Tue, 29 Mar 2016 15:48:23 +0200 [thread overview]
Message-ID: <56FA87A7.9060405@redhat.com> (raw)
In-Reply-To: <1459258257-17767-18-git-send-email-kwolf@redhat.com>
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On 29.03.2016 15:30, Kevin Wolf wrote:
> We must forbid changing the WCE flag in bdrv_reopen() in the same patch,
> as otherwise the behaviour would change so that the flag takes
> precedence over the explicitly specified option.
>
> The correct value of the WCE flag depends on the BlockBackend user (e.g.
> guest device) and isn't a decision that the QMP client makes, so this
> change is what we want.
>
> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
> ---
> block.c | 18 ++++++------------
> qemu-io-cmds.c | 14 +++++++++++++-
> tests/qemu-iotests/142 | 2 +-
> tests/qemu-iotests/142.out | 2 +-
> 4 files changed, 21 insertions(+), 15 deletions(-)
Reviewed-by: Max Reitz <mreitz@redhat.com>
For some weird reason I thought that blk_enable_write_cache() always
returned true here. Which is not true, of course.
Max
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next prev parent reply other threads:[~2016-03-29 13:48 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-29 13:30 [Qemu-devel] [PATCH v2 00/20] block: Implement writethrough in BlockBackend Kevin Wolf
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 01/20] block: Add bdrv_parse_cache_mode() Kevin Wolf
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 02/20] qemu-nbd: Call blk_set_enable_write_cache() explicitly Kevin Wolf
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 03/20] qemu-io: " Kevin Wolf
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 04/20] qemu-img: Expand all BDRV_O_FLAGS uses Kevin Wolf
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 05/20] qemu-img: Call blk_set_enable_write_cache() explicitly Kevin Wolf
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 06/20] xen_disk: " Kevin Wolf
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 07/20] block: blockdev_init(): " Kevin Wolf
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 08/20] block: Always set writeback mode in blk_new_open() Kevin Wolf
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 09/20] block: Handle flush error in bdrv_pwrite_sync() Kevin Wolf
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 10/20] block: Move enable_write_cache to BB level Kevin Wolf
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 11/20] block/qapi: Use blk_enable_write_cache() Kevin Wolf
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 12/20] block: Introduce bdrv_co_writev_flags() Kevin Wolf
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 13/20] iscsi: Support BDRV_REQ_FUA Kevin Wolf
2016-03-29 13:43 ` Max Reitz
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 14/20] nbd: " Kevin Wolf
2016-03-29 13:44 ` Max Reitz
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 15/20] raw: " Kevin Wolf
2016-03-29 13:45 ` Max Reitz
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 16/20] block: Use bdrv_parse_cache_mode() in drive_init() Kevin Wolf
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 17/20] qemu-io: Use bdrv_parse_cache_mode() in reopen_f() Kevin Wolf
2016-03-29 13:48 ` Max Reitz [this message]
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 18/20] block: Remove bdrv_parse_cache_flags() Kevin Wolf
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 19/20] block: Remove BDRV_O_CACHE_WB Kevin Wolf
2016-03-29 13:30 ` [Qemu-devel] [PATCH v2 20/20] block: Remove bdrv_(set_)enable_write_cache() Kevin Wolf
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