[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1194951545.6983.26.camel@twins>
Date: Tue, 13 Nov 2007 11:59:05 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: benh@...nel.crashing.org
Cc: paulmck@...ux.vnet.ibm.com, Steven Rostedt <rostedt@...dmis.org>,
linux-kernel@...r.kernel.org, tony@...eyournoodle.com,
paulus@...ba.org, dino@...ibm.com, tytso@...ibm.com,
dvhltc@...ibm.com, niv@...ibm.com, antonb@...ibm.com,
Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH, RFC] improved hacks to allow -rt to run kernbench on
POWER
On Tue, 2007-11-13 at 11:05 +0100, Peter Zijlstra wrote:
> Anyway, it seems its the generic irq stuff that uses raw_spinlock_t and
> disables IRQs, so there isn't much we can do from the ARCH level I'm
> afraid :-(
>
> Ingo, any sane ideas?
Ok benh came up with a workable idea, he just needs a night's sleep to
come up with the details :-)
The idea is to fill the radix tree from host->ops->map() (or
irq_create_mapping()) as that should still be preemptable, and then
convert all other uses to RCU lookups.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists