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Re: [Qemu-devel] [PATCH v2] qcow2: Unlock during COW

From: Zhi Yong Wu
Subject: Re: [Qemu-devel] [PATCH v2] qcow2: Unlock during COW
Date: Sat, 5 May 2012 11:17:16 +0800

On Sat, May 5, 2012 at 8:21 AM, Marc-André Lureau
<address@hidden> wrote:
> Hi
> On Mon, Nov 14, 2011 at 6:55 PM, Kevin Wolf <address@hidden> wrote:
>> Unlocking during COW allows for more parallelism. One change it requires is
>> that buffers are dynamically allocated instead of just using a per-image
>> buffer.
> This commit introduces failure with preallocation and some sizes:
> qemu-img create -f qcow2 new.img 976563K -o preallocation=metadata
> qemu-img: qemu-coroutine-lock.c:111: qemu_co_mutex_unlock: Assertion
> `mutex->locked == 1' failed.
For this issue, i have submitted two patches, can you help test agaist
my patchs?
1. [1/2] block: make bdrv_create adopt coroutine
2. [2/2] qcow2: lock on prealloc
> regards
> --
> Marc-André Lureau


Zhi Yong Wu

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