From: Dave Jones <davej@redhat.com>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>, Andi Kleen <ak@suse.de>,
David Bahi <dbahi@novell.com>,
linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org,
Gregory Haskins <GHaskins@novell.com>
Subject: Re: nmi_watchdog fix for x86_64 to be more like i386
Date: Mon, 1 Oct 2007 16:10:46 -0400 [thread overview]
Message-ID: <20071001201046.GA7089@redhat.com> (raw)
In-Reply-To: <20071001125626.32eb6d0b@laptopd505.fenrus.org>
On Mon, Oct 01, 2007 at 12:56:26PM -0700, Arjan van de Ven wrote:
> On Mon, 1 Oct 2007 21:27:39 +0200 (CEST)
>
> > > I already did this here by checking for cpu != 0. But it also needs
> > > either tracking or forbidding migrations of irq 0. I can take care
> > > of the patch.
> >
> > I was thinking about the same fix. On i386 we already have the irq
> > migration / balancing of irq 0 disabled. That's why we setup IRQ0 with
> > IRQ_NOBALANCING.
>
> btw doing this is a problem if the user decides to hot(un)plug cpu 0...
> he then can't move the irqs away to do that
You can't hot unplug cpu0.
Take a look in sysfs, no /sys/devices/system/cpu/cpu0/online file.
Dave
--
http://www.codemonkey.org.uk
next prev parent reply other threads:[~2007-10-01 20:11 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-26 18:03 nmi_watchdog fix for x86_64 to be more like i386 David Bahi
2007-10-01 17:36 ` Andi Kleen
2007-10-01 18:54 ` Thomas Gleixner
2007-10-01 19:16 ` Andi Kleen
2007-10-01 19:27 ` Thomas Gleixner
2007-10-01 19:56 ` Arjan van de Ven
2007-10-01 20:10 ` Dave Jones [this message]
2007-10-01 20:11 ` Paul E. McKenney
2007-10-01 21:17 ` Thomas Gleixner
2007-10-01 21:41 ` Andi Kleen
2007-10-01 21:58 ` Thomas Gleixner
2007-10-01 22:07 ` Andi Kleen
2007-10-01 22:47 ` Thomas Gleixner
2007-10-01 22:52 ` Arjan van de Ven
2007-10-02 4:56 ` Mika Penttilä
2007-10-02 5:00 ` Arjan van de Ven
2007-10-02 5:51 ` Andi Kleen
2007-10-02 6:18 ` Thomas Gleixner
2007-10-05 4:37 ` Pallipadi, Venkatesh
2007-10-05 20:37 ` Thomas Gleixner
-- strict thread matches above, loose matches on Subject: below --
2007-10-05 16:01 David Bahi
2007-10-05 16:03 ` Andi Kleen
2007-10-05 17:38 ` Peter W. Morreale
2007-10-05 18:00 ` Andi Kleen
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=20071001201046.GA7089@redhat.com \
--to=davej@redhat.com \
--cc=GHaskins@novell.com \
--cc=ak@suse.de \
--cc=arjan@infradead.org \
--cc=dbahi@novell.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rt-users@vger.kernel.org \
--cc=tglx@linutronix.de \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.