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Date: Mon, 24 Sep 2012 18:07:43 +0200 From: Peter Zijlstra <a.p.zijlstra@...llo.nl> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: Mel Gorman <mgorman@...e.de>, Borislav Petkov <bp@...en8.de>, Nikolay Ulyanitsky <lystor@...il.com>, Mike Galbraith <efault@....de>, linux-kernel@...r.kernel.org, Andreas Herrmann <andreas.herrmann3@....com>, Andrew Morton <akpm@...ux-foundation.org>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...nel.org> Subject: Re: 20% performance drop on PostgreSQL 9.2 from kernel 3.5.3 to 3.6-rc5 on AMD chipsets - bisected On Mon, 2012-09-24 at 08:52 -0700, Linus Torvalds wrote: > Your patch looks odd, though. Why do you use some complex initial > value for 'candidate' (nr_cpu_ids) instead of a simple and readable > one (-1)? nr_cpu_ids is the typical no-value value for cpumask operations -- yes this is annoying and I keep doing it wrong far too often. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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