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Re: [Qemu-block] [PATCH v3 0/4] qcow2: async handling of fragmented io

From: Vladimir Sementsov-Ogievskiy
Subject: Re: [Qemu-block] [PATCH v3 0/4] qcow2: async handling of fragmented io
Date: Thu, 15 Aug 2019 15:39:50 +0000

15.08.2019 17:09, Max Reitz wrote:
> On 15.08.19 14:10, Vladimir Sementsov-Ogievskiy wrote:
>> Hi all!
>> Here is an asynchronous scheme for handling fragmented qcow2
>> reads and writes. Both qcow2 read and write functions loops through
>> sequential portions of data. The series aim it to parallelize these
>> loops iterations.
>> It improves performance for fragmented qcow2 images, I've tested it
>> as described below.
> Looks good to me, but I can’t take it yet because I need to wait for
> Stefan’s branch to be merged, of course.
> Speaking of which, why didn’t you add any tests for the *_part()
> methods?  I find it a bit unsettling that nothing would have caught the
> bug you had in v2 in patch 3.

Hmm, any test with write to fragmented area should have caught it.. Ok,
I'll think of something.

Best regards,

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