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From: Robin Holt <holt@sgi.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: holt@sgi.com, linux-kernel@vger.kernel.org,
	linux-ia64@vger.kernel.org, ptesarik@suse.cz, tee@sgi.com,
	peterz@infradead.org, mingo@elte.hu, linux-arch@vger.kernel.org
Subject: Re: [Patch V3 0/3] Enable irqs when waiting for rwlocks
Date: Wed, 3 Dec 2008 05:37:44 -0600	[thread overview]
Message-ID: <20081203113744.GE8970@sgi.com> (raw)
In-Reply-To: <20081202161311.ae3376cb.akpm@linux-foundation.org>

> It's a bit regrettable to have different architectures behaving in
> different ways.  It would be interesting to toss an x86_64
> implementation into the grinder, see if it causes any problems, see if
> it produces any tangible benefits.  Then other architectures might
> follow.  Or not, depending on the results ;)

I personally expect SGI to work on this for x86_64 in the future.
Once we actually start testing systems with 128 and above cpus, I
would expect to see these performance issues needing to be addressed.
Until then, it is just a theoretical.

Thank you for your help,
Robin Holt

WARNING: multiple messages have this Message-ID (diff)
From: Robin Holt <holt@sgi.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: holt@sgi.com, linux-kernel@vger.kernel.org,
	linux-ia64@vger.kernel.org, ptesarik@suse.cz, tee@sgi.com,
	peterz@infradead.org, mingo@elte.hu, linux-arch@vger.kernel.org
Subject: Re: [Patch V3 0/3] Enable irqs when waiting for rwlocks
Date: Wed, 03 Dec 2008 11:37:44 +0000	[thread overview]
Message-ID: <20081203113744.GE8970@sgi.com> (raw)
In-Reply-To: <20081202161311.ae3376cb.akpm@linux-foundation.org>

> It's a bit regrettable to have different architectures behaving in
> different ways.  It would be interesting to toss an x86_64
> implementation into the grinder, see if it causes any problems, see if
> it produces any tangible benefits.  Then other architectures might
> follow.  Or not, depending on the results ;)

I personally expect SGI to work on this for x86_64 in the future.
Once we actually start testing systems with 128 and above cpus, I
would expect to see these performance issues needing to be addressed.
Until then, it is just a theoretical.

Thank you for your help,
Robin Holt

  reply	other threads:[~2008-12-03 11:37 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-11-04 12:24 [Patch V3 0/3] Enable irqs when waiting for rwlocks holt
2008-11-04 12:24 ` holt
2008-11-04 12:24 ` [Patch V3 1/3] Factor out #ifdefs from kernel/spinlock.c to LOCK_CONTENDED_FLAGS holt
2008-11-04 12:24   ` holt
2008-11-04 12:24 ` [Patch V3 2/3] Allow rwlocks to re-enable interrupts holt
2008-11-04 12:24   ` holt
2008-11-04 12:24 ` [Patch V3 3/3] ia64: implement interrupt-enabling rwlocks holt
2008-11-04 12:24   ` holt
2008-12-03  0:13 ` [Patch V3 0/3] Enable irqs when waiting for rwlocks Andrew Morton
2008-12-03  0:13   ` Andrew Morton
2008-12-03  0:13   ` Andrew Morton
2008-12-03  0:13   ` Andrew Morton
2008-12-03 11:37   ` Robin Holt [this message]
2008-12-03 11:37     ` Robin Holt
2008-12-03 12:25     ` Peter Zijlstra
2008-12-03 12:25       ` Peter Zijlstra
2008-12-03 12:36       ` Petr Tesarik
2008-12-03 12:36         ` Petr Tesarik
2008-12-03 12:36         ` Petr Tesarik
2008-12-03 12:44         ` Peter Zijlstra
2008-12-03 12:44           ` Peter Zijlstra
2008-12-03 12:44           ` Peter Zijlstra
2009-01-07 23:35 ` Andrew Morton
2009-01-07 23:35   ` Andrew Morton
2009-01-08  0:05   ` Luck, Tony
2009-01-08  0:05     ` Luck, Tony

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