All of lore.kernel.org
 help / color / mirror / Atom feed
From: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com>,
	vatsa@in.ibm.com, clameter@sgi.com, tglx@linutronix.de,
	arjan@linux.intel.com, linux-kernel@vger.kernel.org
Subject: Re: [RFC] Patch: dynticks: idle load balancing
Date: Tue, 19 Dec 2006 13:12:24 -0800	[thread overview]
Message-ID: <20061219131223.E23105@unix-os.sc.intel.com> (raw)
In-Reply-To: <20061219201247.GA12648@elte.hu>; from mingo@elte.hu on Tue, Dec 19, 2006 at 09:12:48PM +0100

On Tue, Dec 19, 2006 at 09:12:48PM +0100, Ingo Molnar wrote:
>  restart:
>  	if (idle_cpu(local_cpu) && notick.load_balancer == local_cpu) {
>  		this_cpu = first_cpu(cpus);
> +		if (unlikely(this_cpu >= NR_CPUS))
> +			return;

oops.

There is window when local_cpu is cleared from notick.cpumask
but the notick.load_balancer still points to local_cpu..
This can also be corrected by first resetting the notick.load_balancer
before clearing that cpu from notick.cpumask in select_notick_load_balancer()

thanks,
suresh

  reply	other threads:[~2006-12-19 21:49 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-12-11 23:53 [RFC] Patch: dynticks: idle load balancing Siddha, Suresh B
2006-12-13 22:43 ` Ingo Molnar
2006-12-13 23:13   ` Ingo Molnar
2006-12-13 23:03     ` Siddha, Suresh B
2006-12-13 23:31       ` Ingo Molnar
2006-12-13 23:19         ` Siddha, Suresh B
2006-12-14  0:34           ` Ingo Molnar
2006-12-19 20:12           ` Ingo Molnar
2006-12-19 21:12             ` Siddha, Suresh B [this message]
2007-01-16 11:35               ` Ingo Molnar
2007-01-30 21:57                 ` Siddha, Suresh B
2007-02-07 22:19                   ` Siddha, Suresh B
2007-02-17  2:03                   ` [patch 1/2] sched: fix idle load balancing in softirqd context Siddha, Suresh B
2007-02-17  2:08                     ` [patch 2/2] sched: dynticks idle load balancing - v2 Siddha, Suresh B
2007-02-21 20:23                       ` Andrew Morton
2007-02-22  3:14                         ` Nick Piggin
2007-02-24  2:01                         ` [patch] sched: dynticks idle load balancing - v3 Siddha, Suresh B
2007-02-22  3:26                       ` [patch 2/2] sched: dynticks idle load balancing - v2 Nick Piggin
2007-02-22 22:33                         ` Siddha, Suresh B
2007-02-23  3:43                           ` Nick Piggin
2007-02-17 14:42                     ` [patch 1/2] sched: fix idle load balancing in softirqd context Steven Rostedt
2007-02-21  6:25                       ` Siddha, Suresh B
2007-02-21 20:13                     ` Andrew Morton
2006-12-13 23:48     ` [RFC] Patch: dynticks: idle load balancing Ingo Molnar
2006-12-20  0:49 ` Steven Rostedt

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=20061219131223.E23105@unix-os.sc.intel.com \
    --to=suresh.b.siddha@intel.com \
    --cc=arjan@linux.intel.com \
    --cc=clameter@sgi.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@elte.hu \
    --cc=tglx@linutronix.de \
    --cc=vatsa@in.ibm.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 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.