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Re: [Qemu-devel] [Nbd] [PATCH] nbd: fix trim/discard commands with a len

From: Alex Bligh
Subject: Re: [Qemu-devel] [Nbd] [PATCH] nbd: fix trim/discard commands with a length bigger than NBD_MAX_BUFFER_SIZE
Date: Wed, 11 May 2016 15:55:40 +0100

On 11 May 2016, at 15:08, Eric Blake <address@hidden> wrote:

> Then I think I will propose a doc patch to the extension-info branch
> that adds new INFO items for NBD_INFO_TRIM_SIZE and
> NBD_INFO_WRITE_ZERO_SIZE (if requested by client and replied by server,
> then this can be larger than the normal maximum size in
> NBD_INFO_BLOCK_SIZE; if either side doesn't request the info, then
> assume any maximum in NBD_INFO_BLOCK_SIZE applies, otherwise UINT32_MAX;
> and the two infos are separate items because NBD_FLAG_SEND_TRIM and
> NBD_FLAG_SEND_WRITE_ZEROES are orthogonally optional).

mmmm ...

at this rate you'd be better with a list of command / maximum size

Alex Bligh

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