From: Karsten Graul <kgraul@linux.ibm.com>
To: Tony Lu <tonylu@linux.alibaba.com>
Cc: kuba@kernel.org, davem@davemloft.net, guwen@linux.alibaba.com,
netdev@vger.kernel.org, linux-s390@vger.kernel.org,
linux-rdma@vger.kernel.org
Subject: Re: [PATCH RFC net] net/smc: Ensure the active closing peer first closes clcsock
Date: Wed, 24 Nov 2021 11:08:23 +0100 [thread overview]
Message-ID: <1f67548e-cbf6-0dce-82b5-10288a4583bd@linux.ibm.com> (raw)
In-Reply-To: <YZ3+ihxIU5l8mvWY@TonyMac-Alibaba>
On 24/11/2021 09:57, Tony Lu wrote:
> IMHO, given that, it is better to not ignore smc_close_final(), and move
> kernel_sock_shutdown() to __smc_release(), because smc_shutdown() also
> calls kernel_sock_shutdown() after smc_close_active() and
> smc_close_shutdown_write(), then enters SMC_PEERCLOSEWAIT1. It's no need
> to call it twice with SHUT_WR and SHUT_RDWR.
Since the idea is to shutdown the socket before the remote peer shutdowns it
first, are you sure that this shutdown in smc_release() is not too late?
Is it sure that smc_release() is called in time for this processing?
Maybe its better to keep the shutdown in smc_close_active() and to use an rc1
just like shown in your proposal, and return either the rc of smc_close_final()
or the rc of kernel_sock_shutdown().
I see the possibility of calling shutdown twice for the clcsocket, but does it
harm enough to give a reason to check it before in smc_shutdown()? I expect TCP
to handle this already.
next prev parent reply other threads:[~2021-11-24 10:08 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-16 3:30 [PATCH RFC net] net/smc: Ensure the active closing peer first closes clcsock Tony Lu
2021-11-17 16:19 ` Karsten Graul
2021-11-22 16:47 ` Karsten Graul
2021-11-23 3:03 ` Tony Lu
2021-11-23 9:26 ` Karsten Graul
2021-11-24 8:57 ` Tony Lu
2021-11-24 10:08 ` Karsten Graul [this message]
2021-11-24 11:26 ` Tony Lu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1f67548e-cbf6-0dce-82b5-10288a4583bd@linux.ibm.com \
--to=kgraul@linux.ibm.com \
--cc=davem@davemloft.net \
--cc=guwen@linux.alibaba.com \
--cc=kuba@kernel.org \
--cc=linux-rdma@vger.kernel.org \
--cc=linux-s390@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=tonylu@linux.alibaba.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).