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Subject: Re: [Bugme-new] [Bug 15618] New: 2.6.18->2.6.32->2.6.33 huge regression in performance
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From: Anton Starikov <ant.starikov@gmail.com>
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Date: Tue, 23 Mar 2010 19:25:43 +0100
Cc: Ingo Molnar <mingo@elte.hu>,
       Linus Torvalds <torvalds@linux-foundation.org>, linux-mm@kvack.org,
       linux-kernel@vger.kernel.org, bugzilla-daemon@bugzilla.kernel.org,
       bugme-daemon@bugzilla.kernel.org,
       Peter Zijlstra <a.p.zijlstra@chello.nl>
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References: <bug-15618-10286@https.bugzilla.kernel.org/> <20100323102208.512c16cc.akpm@linux-foundation.org> <20100323173409.GA24845@elte.hu> <alpine.LFD.2.00.1003231037410.18017@i5.linux-foundation.org> <20100323180002.GA2965@elte.hu> <15090451-C292-44D6-B2BA-DCBCBEEF429D@gmail.com> <20100323112141.7f248f2b.akpm@linux-foundation.org>
To: Andrew Morton <akpm@linux-foundation.org>
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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.