From: Mark Huth <mhuth@mvista.com>
To: Steve Wise <swise@opengridcomputing.com>
Cc: netdev@vger.kernel.org
Subject: Re: netpoll question
Date: Wed, 28 Mar 2007 16:28:59 -0700 [thread overview]
Message-ID: <460AFA3B.6090009@mvista.com> (raw)
In-Reply-To: <1175119380.28767.4.camel@stevo-laptop>
Steve Wise wrote:
> Hey all,
>
> I have netpoll question. How does netpoll work with MSI/X, NAPI, and
> nics that setup multiple RSS style receive queues for a single port?
> >From what I can tell, if you're doing something like netdump using
> netpoll for IO, then you might never process incoming packets that get
> posted to the rx queues not associated with the main netdevice structure
> because netpoll only calls the poll() function for the main netdev
> struct. Not the dummy netdevs setup for multiple rx queues.
>
> Is this the case or am I confused?
>
> Thanks,
>
>
> Steve
You are correct. Netpoll needs a bit of work, especially on the receive
side, for multi-queue and some other possible problems related to taking
locks when the system is frozen. If I get some time soon, I'm going to
propose an overhaul to address some of these issues that show up in the
kgdboe and netdump cases.
Mark Huth
next prev parent reply other threads:[~2007-03-28 23:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-28 22:03 netpoll question Steve Wise
2007-03-28 23:28 ` Mark Huth [this message]
2007-03-29 1:00 ` Steve Wise
2007-03-29 1:08 ` Stephen Hemminger
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=460AFA3B.6090009@mvista.com \
--to=mhuth@mvista.com \
--cc=netdev@vger.kernel.org \
--cc=swise@opengridcomputing.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).