From: Lee Revell <rlrevell@joe-job.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: dipankar@in.ibm.com, "Paul E. McKenney" <paulmck@us.ibm.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@osdl.org>,
NetDev <netdev@vger.kernel.org>
Subject: Re: RCU latency regression in 2.6.16-rc1
Date: Wed, 25 Jan 2006 18:13:57 -0500 [thread overview]
Message-ID: <1138230838.3087.54.camel@mindpipe> (raw)
In-Reply-To: <20060125225639.GA1382@elte.hu>
On Wed, 2006-01-25 at 23:56 +0100, Ingo Molnar wrote:
>
> yes, that would be a nice test. (I'm busy now with mutex stuff to be
> able to do a working softirq-preemption patch, but i sent you my
> current patches off-list - if you want to give it a shot. Be warned
> though, there will likely be quite some merging work to do, so it's
> definitely not for the faint hearted.)
>
OK, I probably won't have time to test it this week either.
In the meantime can anyone explain briefly why such a heavy fix is
needed? It seems like it would be simpler to make the route cache
flushing operate in batches of 100 routes, rather than invalidating the
whole thing in one shot. This does seem to be the only softirq that
regularly runs for much more than 1ms.
Would this require major surgery on the networking subsystem?
Lee
parent reply other threads:[~2006-01-25 23:13 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20060125225639.GA1382@elte.hu>]
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=1138230838.3087.54.camel@mindpipe \
--to=rlrevell@joe-job.com \
--cc=dipankar@in.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=netdev@vger.kernel.org \
--cc=paulmck@us.ibm.com \
--cc=torvalds@osdl.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;
as well as URLs for NNTP newsgroup(s).