From: Max Reitz <mreitz@redhat.com>
To: Fam Zheng <famz@redhat.com>, qemu-devel@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>,
pbonzini@redhat.com, Jeff Cody <jcody@redhat.com>,
qemu-block@nongnu.org
Subject: Re: [Qemu-devel] [PATCH v9 1/2] mirror: Rewrite mirror_iteration
Date: Wed, 6 Jan 2016 18:57:29 +0100 [thread overview]
Message-ID: <568D5589.9070208@redhat.com> (raw)
In-Reply-To: <1451983580-10561-2-git-send-email-famz@redhat.com>
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On 05.01.2016 09:46, Fam Zheng wrote:
> The "pnum < nb_sectors" condition in deciding whether to actually copy
> data is unnecessarily strict, and the qiov initialization is
> unnecessarily for bdrv_aio_write_zeroes and bdrv_aio_discard.
>
> Rewrite mirror_iteration to fix both flaws.
>
> Signed-off-by: Fam Zheng <famz@redhat.com>
> ---
> block/mirror.c | 347 +++++++++++++++++++++++++++++++++++----------------------
> trace-events | 1 -
> 2 files changed, 216 insertions(+), 132 deletions(-)
Side note: This breaks the output of iotest 109, probably due to
different alignment of the mirroring operations (doesn't look serious,
though).
Max
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next prev parent reply other threads:[~2016-01-06 17:57 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-05 8:46 [Qemu-devel] [PATCH v9 0/2] mirror: Improve zero write and discard Fam Zheng
2016-01-05 8:46 ` [Qemu-devel] [PATCH v9 1/2] mirror: Rewrite mirror_iteration Fam Zheng
2016-01-06 17:53 ` Max Reitz
2016-01-12 12:06 ` Fam Zheng
2016-01-06 17:57 ` Max Reitz [this message]
2016-01-05 8:46 ` [Qemu-devel] [PATCH v9 2/2] mirror: Add mirror_wait_for_io Fam Zheng
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