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Message-ID: <20100828002855.GI18967@zorg.emea.sgi.com>
Date: Sat, 28 Aug 2010 01:28:55 +0100
From: Hedi Berriche <hedi@....com>
To: "Luck, Tony" <tony.luck@...el.com>
Cc: Petr Tesarik <ptesarik@...e.cz>,
"linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Serious problem with ticket spinlocks on ia64
On Sat, Aug 28, 2010 at 00:55 Tony Luck wrote:
| > this fails so catastrophically
|
| Interesting ... getting rid of some of the fancy asm bits
| (replacing both the ld4.c.nc and the ld2.bias with simple
| "serve = *p" and "tmp = *p") makes this run a lot better.
*Hasty* look seems to suggest that keeping the fancy asm bits but compiling with
-O2 -frename-registers makes it work equally well.
Don't take my word for it though, double check it, it's been a long week and
brain is anything but alert at this time of the night.
Cheers,
Hedi.
--
Hedi Berriche
Global Product Support
http://www.sgi.com/support
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