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Re: [Qemu-devel] [PATCH 6/8] block/qcow2: Simplify shared L2 handling in
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH 6/8] block/qcow2: Simplify shared L2 handling in amend |
Date: |
Wed, 30 Jul 2014 09:36:50 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 |
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 <address@hidden>
> ---
> 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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- [Qemu-devel] [PATCH 2/8] qemu-img: Add progress output for amend, (continued)
- [Qemu-devel] [PATCH 2/8] qemu-img: Add progress output for amend, Max Reitz, 2014/07/25
- [Qemu-devel] [PATCH 3/8] qemu-img: Fix insignifcant memleak, Max Reitz, 2014/07/25
- [Qemu-devel] [PATCH 4/8] block/qcow2: Make get_refcount() global, Max Reitz, 2014/07/25
- [Qemu-devel] [PATCH 5/8] block/qcow2: Implement status CB for amend, Max Reitz, 2014/07/25
- [Qemu-devel] [PATCH 6/8] block/qcow2: Simplify shared L2 handling in amend, Max Reitz, 2014/07/25
- Re: [Qemu-devel] [PATCH 6/8] block/qcow2: Simplify shared L2 handling in amend,
Eric Blake <=
- [Qemu-devel] [PATCH 7/8] block/qcow2: Speed up zero cluster expansion, Max Reitz, 2014/07/25
- [Qemu-devel] [PATCH 8/8] iotests: Expand test 061, Max Reitz, 2014/07/25
- [Qemu-devel] [PATCH 1/8] block: Add status callback to bdrv_amend_options(), Max Reitz, 2014/07/25