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Date: Mon, 27 May 2013 21:53:43 +0200 From: Manfred Spraul <manfred@...orfullife.com> To: Rik van Riel <riel@...hat.com> CC: LKML <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org>, Davidlohr Bueso <davidlohr.bueso@...com>, hhuang@...hat.com, Linus Torvalds <torvalds@...ux-foundation.org> Subject: Re: [PATCH 1/4] ipc/sem.c: Fix missing wakeups in do_smart_update_queue() Hi Rik, On 05/27/2013 07:51 PM, Rik van Riel wrote: > > Very much not optimized, but we need to fix the regression. > > Acked-by: Rik van Riel <riel@...hat.com> Thanks for the review. I was afraid that the differences would be noticeable but they aren't: At least on my laptop, the differences between the patches are within the noise: # ./cat /proc/stat | grep ctxt;./osim 2 2 1000000 0 0;cat /proc/stat | grep ctxt runtime: stock patch 1 patch 1-4 2,0088875 2,041084 1,997367 # ./cat /proc/stat | grep ctxt;./osim 2 20 1000000 0 0;cat /proc/stat | grep ctxt 4,32541 4,295956 4,277817 (assuming 2 cpus, otherwise increase "2" and "20" accordingly) Here is the link to the tool: http://marc.info/?l=linux-kernel&m=125038376609750 -- Manfred -- 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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