linux-kernel - Re: [Bugme-new] [Bug 15618] New: 2.6.18->2.6.32->2.6.33 huge regression in performance

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Message-Id: <41DAB29F-59B7-4D38-A389-75FAC47225BF@gmail.com>
Date:	Tue, 23 Mar 2010 19:25:43 +0100
From:	Anton Starikov <ant.starikov@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	bugzilla-daemon@...zilla.kernel.org,
	bugme-daemon@...zilla.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [Bugme-new] [Bug 15618] New: 2.6.18->2.6.32->2.6.33 huge regression in performance

On Mar 23, 2010, at 7:21 PM, Andrew Morton wrote:
>> I will apply this commits to 2.6.32, I afraid current OFED (which I need also) will not work on 2.6.33+.
>> 
> 
> You should be able to simply set CONFIG_RWSEM_GENERIC_SPINLOCK=n,
> CONFIG_RWSEM_XCHGADD_ALGORITHM=y by hand, as I mentioned earlier?

Hm. I tried, but when I do "make oldconfig", then it gets rewritten, so I assume that it conflicts with some other setting from default fedora kernel config. trying to figure out which one exactly.

Anton.--
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