From: Stephen Hemminger <shemminger@vyatta.com>
To: "Dushan Tcholich" <dusanc@gmail.com>
Cc: "Francois Romieu" <romieu@fr.zoreil.com>,
"Robert Hancock" <hancockr@shaw.ca>,
netdev@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: ksoftirqd high cpu load on kernels 2.6.24 to 2.6.27-rc1-mm1
Date: Sun, 31 Aug 2008 10:05:37 -0700 [thread overview]
Message-ID: <20080831100537.6929c51e@extreme> (raw)
In-Reply-To: <a08621850808310151o143845h195a8658d02270d9@mail.gmail.com>
On Sun, 31 Aug 2008 10:51:46 +0200
"Dushan Tcholich" <dusanc@gmail.com> wrote:
> Hello
> I found the culprit.
>
> When using powertop I get:
> Top causes for wakeups:
> 35,2% (251,0) ip : br_stp_enable_bridge (br_hello_timer_expired
>
> So I tried to turn them off with:
> brctl sethello br0 0
> but the problem persisted.
You can't turn off the hello timer, it is needed for Spanning Tree to
work. The kernel should reject requests to set hello timer < 1sec.
Most routers allow 1 - 10sec.
I am going to do a new patch to add tighter range checking for STP timer
settings and another to default fowarding delay of zero if STP is disabled.
next prev parent reply other threads:[~2008-08-31 17:05 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <fa.wTMiBcGRgw2fBtdHwtX7y0lkc8s@ifi.uio.no>
2008-08-04 19:43 ` ksoftirqd high cpu load on kernels 2.6.24 to 2.6.27-rc1-mm1 Robert Hancock
2008-08-04 20:37 ` Dushan Tcholich
[not found] ` <20080807185802.GA16327@electric-eye.fr.zoreil.com>
[not found] ` <a08621850808101200n220afd2dve58abe67830b7a4f@mail.gmail.com>
[not found] ` <a08621850808110053j5cbf23e6xdf52c9e7440abf19@mail.gmail.com>
2008-08-30 1:48 ` Dushan Tcholich
2008-08-31 8:51 ` Dushan Tcholich
2008-08-31 17:05 ` Stephen Hemminger [this message]
2008-08-31 17:43 ` [RFC] bridge: STP timer management range checking Stephen Hemminger
2008-08-31 22:02 ` Alan Cox
2008-08-31 23:29 ` Stephen Hemminger
2008-09-01 8:38 ` Alan Cox
2008-09-02 16:40 ` Rick Jones
2008-09-02 23:41 ` David Miller
2008-09-03 0:00 ` Rick Jones
2008-09-01 2:25 ` Valdis.Kletnieks
2008-09-03 0:28 ` David Miller
2008-09-04 22:47 ` [PATCH] bridge: don't allow setting hello time to zero Stephen Hemminger
2008-09-08 20:46 ` David Miller
2008-09-08 21:35 ` Dushan Tcholich
2008-09-08 22:33 ` Stephen Hemminger
2008-08-31 19:14 ` ksoftirqd high cpu load on kernels 2.6.24 to 2.6.27-rc1-mm1 Dushan Tcholich
2008-08-04 14:17 Dushan Tcholich
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=20080831100537.6929c51e@extreme \
--to=shemminger@vyatta.com \
--cc=dusanc@gmail.com \
--cc=hancockr@shaw.ca \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=romieu@fr.zoreil.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