From: Prarit Bhargava <prarit@redhat.com>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: virtualization@lists.osdl.org,
Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>, John Hawkes <hawkes@sgi.com>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Eric Dumazet <dada1@cosmosbay.com>
Subject: Re: [patch 3/4] Locally disable the softlockup watchdog rather than touching it
Date: Wed, 28 Mar 2007 11:27:34 -0400 [thread overview]
Message-ID: <460A8966.6090208@redhat.com> (raw)
In-Reply-To: <460A8820.3060708@goop.org>
Jeremy Fitzhardinge wrote:
> Prarit Bhargava wrote:
>
>> You don't have to do them all -- you could do one with (as in my
>> previous patch -- which I'm not married to BTW ;) )
>>
>> touch_cpu_softlockup_watchdog()
>>
>> and all with
>>
>> touch_softlockup_watchdog()
>>
>
> Well, I think changing the meaning of touch_softlockup_watchdog() for
> all existing callers is wrong - even if you change most of them to refer
> to the cpu-local function.
Hmmm .... it was suggested to me that I should mimic what
touch_nmi_watchdog() does.
> There are definitely specific occasions on
> which touching all CPUs is the right thing to do, but not in the general
> case.
>
Yep. That's why I have both a single cpu touch and the whole shebang :)
> The only thing I really care about in my patches is ignoring stolen
> time. It may be that fixing that is enough to fix the reported problems
> with spurious watchdog messages on tickless idle CPUs.
>
>
> J
>
WARNING: multiple messages have this Message-ID (diff)
From: Prarit Bhargava <prarit@redhat.com>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Ingo Molnar <mingo@elte.hu>,
Linux Kernel <linux-kernel@vger.kernel.org>,
virtualization@lists.osdl.org, Eric Dumazet <dada1@cosmosbay.com>,
Andrew Morton <akpm@linux-foundation.org>,
Chris Lalancette <clalance@redhat.com>,
John Hawkes <hawkes@sgi.com>
Subject: Re: [patch 3/4] Locally disable the softlockup watchdog rather than touching it
Date: Wed, 28 Mar 2007 11:27:34 -0400 [thread overview]
Message-ID: <460A8966.6090208@redhat.com> (raw)
In-Reply-To: <460A8820.3060708@goop.org>
Jeremy Fitzhardinge wrote:
> Prarit Bhargava wrote:
>
>> You don't have to do them all -- you could do one with (as in my
>> previous patch -- which I'm not married to BTW ;) )
>>
>> touch_cpu_softlockup_watchdog()
>>
>> and all with
>>
>> touch_softlockup_watchdog()
>>
>
> Well, I think changing the meaning of touch_softlockup_watchdog() for
> all existing callers is wrong - even if you change most of them to refer
> to the cpu-local function.
Hmmm .... it was suggested to me that I should mimic what
touch_nmi_watchdog() does.
> There are definitely specific occasions on
> which touching all CPUs is the right thing to do, but not in the general
> case.
>
Yep. That's why I have both a single cpu touch and the whole shebang :)
> The only thing I really care about in my patches is ignoring stolen
> time. It may be that fixing that is enough to fix the reported problems
> with spurious watchdog messages on tickless idle CPUs.
>
>
> J
>
next prev parent reply other threads:[~2007-03-28 15:27 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-27 21:49 [patch 0/4] Revised softlockup watchdog improvement patches Jeremy Fitzhardinge
2007-03-27 21:49 ` Jeremy Fitzhardinge
2007-03-27 21:49 ` [patch 1/4] Ignore stolen time in the softlockup watchdog Jeremy Fitzhardinge
2007-03-27 21:49 ` Jeremy Fitzhardinge
2007-04-24 6:49 ` Andrew Morton
2007-04-24 6:49 ` Andrew Morton
2007-04-24 6:58 ` Jeremy Fitzhardinge
2007-04-24 7:09 ` Andrew Morton
2007-04-24 7:09 ` Andrew Morton
2007-04-24 17:51 ` Jeremy Fitzhardinge
2007-04-24 17:57 ` Andrew Morton
2007-04-24 17:57 ` Andrew Morton
2007-04-24 18:16 ` Jeremy Fitzhardinge
2007-04-24 18:32 ` Andrew Morton
2007-04-24 18:32 ` Andrew Morton
2007-04-24 20:00 ` Jeremy Fitzhardinge
2007-04-24 20:14 ` Andrew Morton
2007-04-24 20:14 ` Andrew Morton
2007-04-24 20:46 ` Jeremy Fitzhardinge
2007-04-24 20:24 ` Jeremy Fitzhardinge
2007-04-24 20:24 ` Jeremy Fitzhardinge
2007-04-24 20:33 ` Andrew Morton
2007-04-24 20:33 ` Andrew Morton
2007-04-24 20:48 ` Jeremy Fitzhardinge
2007-04-24 20:52 ` Daniel Walker
2007-04-24 20:59 ` Ingo Molnar
2007-04-24 20:59 ` Ingo Molnar
2007-04-24 21:01 ` Daniel Walker
2007-04-24 21:14 ` Andrew Morton
2007-04-24 21:14 ` Andrew Morton
2007-04-24 21:20 ` Andi Kleen
2007-04-24 21:33 ` Daniel Walker
2007-03-27 21:49 ` [patch 2/4] percpu enable flag for " Jeremy Fitzhardinge
2007-03-27 21:49 ` Jeremy Fitzhardinge
2007-03-27 21:49 ` [patch 3/4] Locally disable the softlockup watchdog rather than touching it Jeremy Fitzhardinge
2007-03-27 21:49 ` Jeremy Fitzhardinge
2007-03-28 13:33 ` Prarit Bhargava
2007-03-28 13:33 ` Prarit Bhargava
2007-03-28 13:50 ` Andi Kleen
2007-03-28 14:00 ` Prarit Bhargava
2007-03-28 14:09 ` Andi Kleen
2007-03-28 14:13 ` Prarit Bhargava
2007-03-28 14:44 ` Jeremy Fitzhardinge
2007-03-28 14:44 ` Jeremy Fitzhardinge
2007-03-28 14:51 ` Prarit Bhargava
2007-03-28 14:51 ` Prarit Bhargava
2007-03-28 15:22 ` Jeremy Fitzhardinge
2007-03-28 15:27 ` Prarit Bhargava [this message]
2007-03-28 15:27 ` Prarit Bhargava
2007-03-27 21:49 ` [patch 4/4] Add global disable/enable for softlockup watchdog Jeremy Fitzhardinge
2007-03-27 21:49 ` Jeremy Fitzhardinge
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