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Re: [Qemu-devel] [PATCH v6] migration/block: use blk_pwrite_zeroes for e

From: Fam Zheng
Subject: Re: [Qemu-devel] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster
Date: Mon, 24 Apr 2017 20:19:33 +0800
User-agent: Mutt/1.8.0 (2017-02-23) 
On Mon, 04/24 20:09, Fam Zheng wrote:
> It's a separate problem.

To be specific:

1) there is an option "overlap-check" that one can use to
disable the costly metadata check;

2) qcow2 with cluster_size = 512 is probably too uncommon to be optimized for.

Both are irrelevant to why and how this patch can be improved, IMO.

Fam
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