From: Peter Zijlstra <peterz@infradead.org>
To: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Arjan van de Ven <arjan@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org, mingo@elte.hu,
jonathan@jonmasters.org
Subject: Re: [patch 4/4] genirq: add support for threaded interrupt handlers
Date: Mon, 02 Mar 2009 14:21:48 +0100 [thread overview]
Message-ID: <1236000108.5330.384.camel@laptop> (raw)
In-Reply-To: <49A94032.9010105@s5r6.in-berlin.de>
On Sat, 2009-02-28 at 14:46 +0100, Stefan Richter wrote:
> > We also tried to bind the IRQ thread to the CPU if it were to run a
> > softirq. But that too had issues. If the IRQ thread was bound to a CPU and
> > a higher priority process preempted it, that IRQ handler could not migrate
> > to another CPU to finish the work. Now the IRQ handler would need to wait
> > for that high priority process to give up the CPU in order to continue.
> >
> > The solution is to redesign the softirq code to handle migration.
>
> Do you mean "redesign the softirq framework" or "redesign the softirq
> framework users"?
>
> (In the particular case of firewire, the latter should be just fine.)
The latter.
next prev parent reply other threads:[~2009-03-02 13:22 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-26 13:28 [patch 0/4] genirq: add infrastructure for threaded interrupt handlers V2 Thomas Gleixner
2009-02-26 13:28 ` [patch 1/4] genirq: make irqreturn_t an enum Thomas Gleixner
2009-03-25 19:51 ` Geert Uytterhoeven
2009-02-26 13:28 ` [patch 2/4] genirq: use kzalloc instead of explicit zero initialization Thomas Gleixner
2009-02-26 13:28 ` [patch 3/4] genirq: add a quick check handler Thomas Gleixner
2009-02-26 23:03 ` Andrew Morton
2009-02-26 23:11 ` Thomas Gleixner
2009-02-28 22:24 ` Christoph Hellwig
2009-03-01 9:44 ` Thomas Gleixner
2009-03-05 19:59 ` Sven-Thorsten Dietrich
2009-03-17 7:54 ` Christoph Hellwig
2009-03-17 15:29 ` Steven Rostedt
2009-02-26 13:28 ` [patch 4/4] genirq: add support for threaded interrupt handlers Thomas Gleixner
2009-02-26 23:32 ` Andrew Morton
2009-02-27 5:27 ` Arjan van de Ven
2009-02-27 5:45 ` Andrew Morton
2009-02-27 7:18 ` Peter Zijlstra
2009-02-27 7:48 ` Andrew Morton
2009-02-27 8:05 ` Peter Zijlstra
2009-02-27 8:15 ` Andrew Morton
2009-02-27 15:06 ` Arjan van de Ven
2009-02-27 15:30 ` Steven Rostedt
2009-02-28 13:46 ` Stefan Richter
2009-03-02 13:21 ` Peter Zijlstra [this message]
2009-02-28 17:13 ` Andi Kleen
2009-02-27 16:43 ` Thomas Gleixner
2009-02-26 15:26 ` [patch 0/4] genirq: add infrastructure for threaded interrupt handlers V2 Jon Masters
2009-03-05 20:03 ` Sven-Thorsten Dietrich
2009-02-28 22:10 ` Christoph Hellwig
2009-03-01 9:43 ` Thomas Gleixner
2009-03-05 8:40 ` [ANNOUNCE] USB genirq " Sven-Thorsten Dietrich
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