From: Ingo Molnar <mingo@elte.hu>
To: Steven Rostedt <rostedt@goodmis.org>,
Tony Luck <tony.luck@intel.com>, Mike Travis <travis@sgi.com>
Cc: linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Frederic Weisbecker <fweisbec@gmail.com>
Subject: Re: [PATCH 0/8] git pull request for tip/tracing/core
Date: Wed, 11 Feb 2009 18:31:31 +0100 [thread overview]
Message-ID: <20090211173131.GA27546@elte.hu> (raw)
In-Reply-To: <alpine.DEB.1.10.0902111227570.15438@gandalf.stny.rr.com>
* Steven Rostedt <rostedt@goodmis.org> wrote:
> On Wed, 11 Feb 2009, Ingo Molnar wrote:
> > >
> > > I just looked at alpha and arm, I'm now looking at ia64. And this could
> > > be an issue, since it has 14 bits for hard irqs.
> > >
> > > What would be the impact to make the preempt count a long?
> >
> > Assembly code has to be audited i guess, whether it's treated as an int anywhere.
> > Should work i guess.
>
> Before we go and make the change, Peter brought up a good point on IRC. Is
> there any reason that ia64 needs 1 << 14 IRQs? That's 16384!
>
> Perhaps the better solution wolud be (if possible), to simply lower the
> number of bits.
i'm the wrong person to be asked about that. (Cc:-ed the right people)
Ingo
next prev parent reply other threads:[~2009-02-11 17:31 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-08 5:49 [PATCH 0/8] git pull request for tip/tracing/core Steven Rostedt
2009-02-08 5:49 ` [PATCH 1/8] trace: remove deprecated entry->cpu Steven Rostedt
2009-02-08 12:29 ` Frederic Weisbecker
2009-02-08 5:49 ` [PATCH 2/8] ring-buffer: add NMI protection for spinlocks Steven Rostedt
2009-02-08 5:49 ` [PATCH 3/8] ring-buffer: allow tracing_off to be used in core kernel code Steven Rostedt
2009-02-08 5:49 ` [PATCH 4/8] ftrace, x86: rename in_nmi variable Steven Rostedt
2009-02-08 5:50 ` [PATCH 5/8] nmi: add generic nmi tracking state Steven Rostedt
2009-02-08 5:50 ` [PATCH 6/8] ftrace: change function graph tracer to use new in_nmi Steven Rostedt
2009-02-08 5:50 ` [PATCH 7/8] ring-buffer: use generic version of in_nmi Steven Rostedt
2009-02-08 5:50 ` [PATCH 8/8] trace: trivial fixes in comment typos Steven Rostedt
2009-02-09 9:37 ` [PATCH 0/8] git pull request for tip/tracing/core Ingo Molnar
2009-02-11 15:36 ` Ingo Molnar
2009-02-11 15:46 ` Steven Rostedt
2009-02-11 16:25 ` Ingo Molnar
2009-02-11 16:33 ` Steven Rostedt
2009-02-11 16:49 ` Steven Rostedt
2009-02-11 16:59 ` Steven Rostedt
2009-02-11 17:16 ` Ingo Molnar
2009-02-11 17:30 ` Steven Rostedt
2009-02-11 17:31 ` Ingo Molnar [this message]
2009-02-11 17:57 ` Luck, Tony
2009-02-11 18:23 ` Steven Rostedt
2009-02-11 18:34 ` Luck, Tony
2009-02-11 18:42 ` Steven Rostedt
2009-02-11 20:20 ` Ingo Molnar
2009-02-11 20:39 ` Jack Steiner
2009-02-12 2:39 ` Kenji Kaneshige
2009-02-12 2:43 ` Steven Rostedt
2009-02-12 3:15 ` Kenji Kaneshige
2009-02-12 3:22 ` Steven Rostedt
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