From: Thomas Gleixner <tglx@linutronix.de>
To: Esben Nielsen <nielsen.esben@googlemail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@elte.hu>,
linux-kernel@vger.kernel.org
Subject: Re: Why can't I set the priority of softirq-hrt? (Re: 2.6.17-rt1)
Date: Tue, 20 Jun 2006 19:21:31 +0200 [thread overview]
Message-ID: <1150824092.6780.255.camel@localhost.localdomain> (raw)
In-Reply-To: <Pine.LNX.4.64.0606201903030.11643@localhost.localdomain>
On Tue, 2006-06-20 at 19:12 +0100, Esben Nielsen wrote:
> >
> >>
> >> Another complicated design would be to make a task for each priority.
> >> Then the interrupt wakes the highest priority one, which handles the first
> >> callback and awakes the next one etc.
> >
> > Don't think that is necessary.
>
> Me neither :-) Running sofhtirq-hrt at priority 99 - or whatever is
> set by chrt - should be sufficient.
It is not, that was the reason, why we implemted it. You get arbitrary
latencies caused by timer storms.
I have to check, whether the priority is propagated when the softirq is
blocked on a lock. If not its a bug and has to be fixed.
tglx
next prev parent reply other threads:[~2006-06-20 17:20 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-18 7:06 2.6.17-rt1 Ingo Molnar
2006-06-18 16:13 ` 2.6.17-rt1 Michal Piotrowski
[not found] ` <Pine.LNX.4.64.0606201656230.11643@localhost.localdomain>
2006-06-20 15:13 ` Why can't I set the priority of softirq-hrt? (Re: 2.6.17-rt1) Thomas Gleixner
2006-06-20 17:09 ` Esben Nielsen
2006-06-20 16:35 ` Thomas Gleixner
2006-06-20 21:16 ` Esben Nielsen
2006-06-20 20:35 ` Thomas Gleixner
2006-06-20 23:19 ` Esben Nielsen
2006-06-20 16:39 ` Steven Rostedt
2006-06-20 18:12 ` Esben Nielsen
2006-06-20 17:21 ` Thomas Gleixner [this message]
2006-06-20 21:26 ` Esben Nielsen
2006-06-20 20:51 ` Thomas Gleixner
2006-06-21 8:20 ` Steven Rostedt
2006-06-21 11:05 ` Esben Nielsen
2006-06-21 15:43 ` Esben Nielsen
2006-06-21 15:21 ` Steven Rostedt
2006-06-21 16:37 ` Esben Nielsen
2006-06-21 15:51 ` Steven Rostedt
2006-06-21 17:14 ` Esben Nielsen
2006-06-21 16:26 ` Thomas Gleixner
2006-06-21 18:30 ` Ingo Molnar
2006-06-22 10:28 ` Esben Nielsen
2006-06-21 21:29 ` Esben Nielsen
2006-06-21 20:33 ` Thomas Gleixner
2006-06-21 23:35 ` Esben Nielsen
2006-06-22 7:06 ` Thomas Gleixner
2006-06-22 10:32 ` Esben Nielsen
2006-06-22 13:33 ` Steven Rostedt
2006-06-22 13:45 ` Steven Rostedt
2006-06-22 14:20 ` Thomas Gleixner
2006-06-22 14:23 ` Steven Rostedt
2006-06-22 14:26 ` Thomas Gleixner
2006-06-22 18:06 ` Esben Nielsen
2006-06-22 18:05 ` Thomas Gleixner
2006-06-23 11:23 ` Esben Nielsen
2006-06-23 11:06 ` Steven Rostedt
2006-07-03 11:48 ` Esben Nielsen
2006-06-21 8:13 ` Steven Rostedt
2006-06-21 11:03 ` Esben Nielsen
2006-06-22 0:57 ` 2.6.17-rt1 Lee Revell
2006-06-22 2:51 ` More weird latency trace output (was Re: 2.6.17-rt1) Lee Revell
2006-06-23 1:24 ` Lee Revell
2006-06-24 22:15 ` Lee Revell
2006-06-24 22:12 ` Ingo Molnar
2006-06-24 22:31 ` Lee Revell
2006-06-24 23:49 ` Lee Revell
2006-06-23 20:56 ` 2.6.17-rt1 - mm_struct leak Vernon Mauery
2006-06-24 9:24 ` Mark Hounschell
2006-06-24 9:32 ` Mark Hounschell
2006-06-30 16:02 ` [PATCH -RT]Re: " Vernon Mauery
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