lkml.org 
[lkml]   [2021]   [Sep]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC v1] nvme-tcp: enable linger socket option on shutdown
On Mon, Sep 06, 2021 at 08:58:20AM +0100, Christoph Hellwig wrote:
> On Fri, Sep 03, 2021 at 02:17:57PM +0200, Daniel Wagner wrote:
> > When the no linger is set, the networking stack sends FIN followed by
> > RST immediately when shutting down the socket. By enabling linger when
> > shutting down we have a proper shutdown sequence on the wire.
> >
> > Signed-off-by: Daniel Wagner <dwagner@suse.de>
> > ---
> > The current shutdown sequence on the wire is a bit harsh and
> > doesn't let the remote host to react. I suppose we should
> > introduce a short (how long?) linger pause when shutting down
> > the connection. Thoughs?
>
> Why? I'm not really a TCP expert, but why is this different from
> say iSCSI or NBD?

I am also no TCP expert. Adding netdev to Cc.

During testing the nvme-tcp subsystem by one of our partners we observed
this. Maybe this is perfectly fine. Just as I said it looks a bit weird
that a proper shutdown of the connection a RST is send out right after
the FIN.

No idea how iSCSI or NBD handles this. I'll check.

\
 
 \ /
  Last update: 2021-09-14 10:46    [W:4.167 / U:0.036 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site