linux-kernel - Re: [Patch V3 0/3] Enable irqs when waiting for rwlocks

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Message-ID: <20081203113744.GE8970@sgi.com>
Date:	Wed, 3 Dec 2008 05:37:44 -0600
From:	Robin Holt <holt@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	holt@....com, linux-kernel@...r.kernel.org,
	linux-ia64@...r.kernel.org, ptesarik@...e.cz, tee@....com,
	peterz@...radead.org, mingo@...e.hu, linux-arch@...r.kernel.org
Subject: Re: [Patch V3 0/3] Enable irqs when waiting for rwlocks

> 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
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