From: Eric Blake <eblake@redhat.com>
To: Max Reitz <mreitz@redhat.com>, qemu-devel@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>
Subject: Re: [Qemu-devel] [PATCH 6/8] block/qcow2: Simplify shared L2 handling in amend
Date: Wed, 30 Jul 2014 09:36:50 -0600 [thread overview]
Message-ID: <53D91112.30703@redhat.com> (raw)
In-Reply-To: <1406311665-2814-7-git-send-email-mreitz@redhat.com>
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On 07/25/2014 12:07 PM, Max Reitz wrote:
> Currently, we have a bitmap for keeping track of which clusters have
> been created during the zero cluster expansion process. This was
> necessary because we need to properly increase the refcount for shared
> L2 tables.
>
> However, now we can simply take the L2 refcount and use it for the
> cluster allocated for expansion. This will be the correct refcount and
> therefore we don't have to remember that cluster having been allocated
> any more.
>
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> ---
> block/qcow2-cluster.c | 83 +++++++++++++--------------------------------------
> 1 file changed, 21 insertions(+), 62 deletions(-)
Slick - less code, and faster operation :)
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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next prev parent reply other threads:[~2014-07-30 15:37 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-25 18:07 [Qemu-devel] [PATCH 0/8] block/qcow2: Improve (?) zero cluster expansion Max Reitz
2014-07-25 18:07 ` [Qemu-devel] [PATCH 1/8] block: Add status callback to bdrv_amend_options() Max Reitz
2014-07-30 14:50 ` Eric Blake
2014-07-25 18:07 ` [Qemu-devel] [PATCH 2/8] qemu-img: Add progress output for amend Max Reitz
2014-07-30 14:55 ` Eric Blake
2014-07-30 20:20 ` Max Reitz
2014-07-25 18:07 ` [Qemu-devel] [PATCH 3/8] qemu-img: Fix insignifcant memleak Max Reitz
2014-07-30 14:56 ` Eric Blake
2014-07-25 18:07 ` [Qemu-devel] [PATCH 4/8] block/qcow2: Make get_refcount() global Max Reitz
2014-07-30 15:04 ` Eric Blake
2014-07-25 18:07 ` [Qemu-devel] [PATCH 5/8] block/qcow2: Implement status CB for amend Max Reitz
2014-07-30 15:23 ` Eric Blake
2014-07-25 18:07 ` [Qemu-devel] [PATCH 6/8] block/qcow2: Simplify shared L2 handling in amend Max Reitz
2014-07-30 15:36 ` Eric Blake [this message]
2014-07-25 18:07 ` [Qemu-devel] [PATCH 7/8] block/qcow2: Speed up zero cluster expansion Max Reitz
2014-07-30 16:14 ` Eric Blake
2014-07-30 20:31 ` Max Reitz
2014-07-30 20:31 ` Eric Blake
2014-07-30 20:41 ` Max Reitz
2014-07-25 18:07 ` [Qemu-devel] [PATCH 8/8] iotests: Expand test 061 Max Reitz
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