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Re: [Qemu-devel] [PATCH v2 04/17] nbd: Allow larger requests

From: Fam Zheng
Subject: Re: [Qemu-devel] [PATCH v2 04/17] nbd: Allow larger requests
Date: Thu, 16 Jun 2016 13:12:21 +0800
User-agent: Mutt/1.6.1 (2016-04-27)

On Tue, 06/14 15:30, Eric Blake wrote:
> The NBD layer was breaking up request at a limit of 2040 sectors
> (just under 1M) to cater to old qemu-nbd. But the server limit
> was raised to 32M in commit 2d8214885 to match the kernel, more
> than three years ago; and the upstream NBD Protocol is proposing
> documentation that without any explicit communication to state
> otherwise, a client should be able to safely assume that a 32M
> transaction will work.  It is time to rely on the larger sizing,
> and any downstream distro that cares about maximum
> interoperability to older qemu-nbd servers can just tweak the
> value of #define NBD_MAX_SECTORS.
> Signed-off-by: Eric Blake <address@hidden>

Reviewed-by: Fam Zheng <address@hidden>

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