Re: [PATCH net] net/smc: Send out the remaining data in sndbuf before close

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To: dust.li@xxxxxxxxxxxxxxxxx, kgraul@xxxxxxxxxxxxx, davem@xxxxxxxxxxxxx, kuba@xxxxxxxxxx
Subject: Re: [PATCH net] net/smc: Send out the remaining data in sndbuf before close
From: Wen Gu <guwen@xxxxxxxxxxxxxxxxx>
Date: Mon, 28 Mar 2022 17:55:59 +0800
Cc: linux-s390@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
In-reply-to: <20220328090411.GI35207@linux.alibaba.com>
References: <1648447836-111521-1-git-send-email-guwen@linux.alibaba.com> <20220328090411.GI35207@linux.alibaba.com>
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.5.0

Thanks for your comments.

On 2022/3/28 5:04 pm, dust.li wrote:


I think this issue should also happen if TCP_CORK is set and
autocorking is not enabled ?


Yes, setting TCP_CORK also works.


Autocorking and delaying the TX from BH to smc_release_cb() greatly
increased the probability of this problem.

Thanks,
Wen Gu

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References:
- [PATCH net] net/smc: Send out the remaining data in sndbuf before close
  - From: Wen Gu
- Re: [PATCH net] net/smc: Send out the remaining data in sndbuf before close
  - From: dust.li

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