From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <46A93C2B.4080902@kite.se> Date: Fri, 27 Jul 2007 02:28:27 +0200 From: Magnus Naeslund MIME-Version: 1.0 Subject: Re: -mm merge plans for 2.6.23 References: <20070710013152.ef2cd200.akpm@linux-foundation.org> <2c0942db0707250855v414cd72di1e859da423fa6a3a@mail.gmail.com> <200707252316.01021.a1426z@gawab.com> In-Reply-To: <200707252316.01021.a1426z@gawab.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Al Boldi Cc: Ray Lee , "david@lang.hm" , Nick Piggin , Jesper Juhl , Andrew Morton , ck list , Ingo Molnar , Paul Jackson , linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: Al Boldi wrote: > > Thanks for asking. I'm rather surprised why nobody's noticing any of this > slowdown. To be fair, it's not really a regression, on the contrary, 2.4 is > lot worse wrt swapin and swapout, and Rik van Riel even considers a 50% > swapin slowdown wrt swapout something like better than expected (see thread > '[RFC] kswapd: Kernel Swapper performance'). He probably meant random > swapin, which seems to offer a 4x slowdown. > Sorry for the late reply. Well I think I reported this or another swap/tmpfs performance issue earlier ( http://marc.info/?t=116542915700004&r=1&w=2 ), we got the suggestion to increase /proc/sys/vm/page-cluster to 5, but we never came around to try it. Maybe this was the reason for my report to be almost entirely ignored, sorry for that. Regards, Magnus -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org