From: "Steve Wise" <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
To: 'Shiraz Saleem' <shiraz.saleem-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: 'Leon Romanovsky'
<leonro-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
'Tatyana Nikolova'
<tatyana.e.nikolova-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
'Ram Amrani' <ram.amrani-YGCgFSpz5w/QT0dZR+AlfA@public.gmane.org>,
jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org,
dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
e1000-rdma-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: RE: [PATCH rdma-core] iwpmd: Return existing mapping if port reused on active side
Date: Tue, 10 Oct 2017 15:19:51 -0500 [thread overview]
Message-ID: <040901d34205$20ee3c70$62cab550$@opengridcomputing.com> (raw)
In-Reply-To: <20171010193449.GA29720-GOXS9JX10wfOxmVO0tvppfooFf0ArEBIu+b9c/7xato@public.gmane.org>
> >
> > How is a new connection re-using the local port exactly? Is there a test
case
> > that reproduces this?
> >
> > Other than that,
> >
> > Reviewed-by: Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
> >
>
> Hi Steve,
>
> A new connection can reuse a local port if one of destination port,
destination
> address
> or source address differs from an existing connection.
>
> This optimization for port reuse was added in kernel in
> commit 19b752a19dce ("IB/cma: Allow port reuse for rdma_id")
>
> https://patchwork.kernel.org/patch/9499071/
>
> We saw the port-mapper "duplicate mapping error" during Open MPI scale up
> testing.
Ah, I see now. Thanks!
Steve.
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2017-10-10 20:19 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-08 23:34 [PATCH rdma-core] iwpmd: Return existing mapping if port reused on active side Tatyana Nikolova
[not found] ` <20171008233429.16348-1-tatyana.e.nikolova-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-10-10 17:10 ` Leon Romanovsky
[not found] ` <20171010171017.GF2106-U/DQcQFIOTAAJjI8aNfphQ@public.gmane.org>
2017-10-10 17:24 ` Steve Wise
2017-10-10 19:34 ` Shiraz Saleem
[not found] ` <20171010193449.GA29720-GOXS9JX10wfOxmVO0tvppfooFf0ArEBIu+b9c/7xato@public.gmane.org>
2017-10-10 20:19 ` Steve Wise [this message]
2017-10-12 9:11 ` Leon Romanovsky
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='040901d34205$20ee3c70$62cab550$@opengridcomputing.com' \
--to=swise-7bpotxp6k4+p2yhjcf5u+vpxobypeauw@public.gmane.org \
--cc=dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org \
--cc=e1000-rdma-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org \
--cc=jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org \
--cc=leonro-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org \
--cc=linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=ram.amrani-YGCgFSpz5w/QT0dZR+AlfA@public.gmane.org \
--cc=shiraz.saleem-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org \
--cc=tatyana.e.nikolova-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org \
/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