linux-kernel - Re: [PATCH net-next 1/2] net/smc: set rmb's SG_MAX_SINGLE_ALLOC limitation only when CONFIG_ARCH_NO_SG

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Date: Sat, 1 Jun 2024 09:35:17 +0100
From: Simon Horman <horms@...nel.org>
To: Guangguan Wang <guangguan.wang@...ux.alibaba.com>
Cc: wenjia@...ux.ibm.com, jaka@...ux.ibm.com, davem@...emloft.net,
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
	kgraul@...ux.ibm.com, alibuda@...ux.alibaba.com,
	tonylu@...ux.alibaba.com, guwen@...ux.alibaba.com,
	linux-s390@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 1/2] net/smc: set rmb's SG_MAX_SINGLE_ALLOC
 limitation only when CONFIG_ARCH_NO_SG_CHAIN is defined

On Tue, May 28, 2024 at 09:51:37PM +0800, Guangguan Wang wrote:
> SG_MAX_SINGLE_ALLOC is used to limit maximum number of entries that
> will be allocated in one piece of scatterlist. When the entries of
> scatterlist exceeds SG_MAX_SINGLE_ALLOC, sg chain will be used. From
> commit 7c703e54cc71 ("arch: switch the default on ARCH_HAS_SG_CHAIN"),
> we can know that the macro CONFIG_ARCH_NO_SG_CHAIN is used to identify
> whether sg chain is supported. So, SMC-R's rmb buffer should be limitted

Hi Guangguan Wang,

As it looks like there will be a v2:

In this patch: limitted -> limited
In patch 2/2:  defalut -> default

checkpatch.pl --codespell is your friend.

> by SG_MAX_SINGLE_ALLOC only when the macro CONFIG_ARCH_NO_SG_CHAIN is
> defined.
> 
> Signed-off-by: Guangguan Wang <guangguan.wang@...ux.alibaba.com>
> Co-developed-by: Wen Gu <guwen@...ux.alibaba.com>
> Signed-off-by: Wen Gu <guwen@...ux.alibaba.com>
> Fixes: a3fe3d01bd0d ("net/smc: introduce sg-logic for RMBs")

I think it is usual to put the fixes tag above the Signed-of tags,
although I don't see anything about that in [1].

[1] https://www.kernel.org/doc/html/latest/process/submitting-patches.html#using-reported-by-tested-by-reviewed-by-suggested-by-and-fixes

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