From: Livio Soares <livio@eecg.toronto.edu>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
linuxppc-dev@ozlabs.org
Subject: Re: [PATCH][PowerPC] Remove ineffective CONFIG_IRQ_ALL_CPUS option
Date: Thu, 18 Jan 2007 20:06:05 -0500 [thread overview]
Message-ID: <20070119010605.GA3259@eecg.toronto.edu> (raw)
In-Reply-To: <20070118182152.GA11204@eecg.toronto.edu>
Sorry to reply to myself, but...
Livio Soares writes:
> Hello Ben,
>
> Benjamin Herrenschmidt writes:
> > On Wed, 2007-01-17 at 18:02 -0500, Livio Soares wrote:
>
> [...]
> On a side note, I probably need to make IRQ distribution configurable at
> run-time (for my personal work). I was thinking of exporting a bit-mask type
> structure through sysfs, to enable run-time configuration of CPUs which can
> receive interrupts (and possibly priorities). Would people be interested in such
> a patch?
Looking at the code, I found out that this is _already_ being done; through
setting affinities of interrupts. If you can get the bitmask right in
/proc/irq/[IRQ#]/smp_affinity, you can change the distribution of interrupts
(furthermore, potentially disable a particular IRQ altogether a particular
CPU).
Sorry for the noise,
Livio
next prev parent reply other threads:[~2007-01-19 1:06 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-17 23:02 [PATCH][PowerPC] Remove ineffective CONFIG_IRQ_ALL_CPUS option Livio Soares
2007-01-18 0:16 ` Benjamin Herrenschmidt
2007-01-18 18:21 ` Livio Soares
2007-01-19 1:06 ` Livio Soares [this message]
2007-01-19 1:35 ` Benjamin Herrenschmidt
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