From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 22 May 2007 12:25:30 +0200 From: Ingo Molnar Subject: Re: [PATCH] mm: swap prefetch improvements Message-ID: <20070522102530.GB2344@elte.hu> References: <20070430162007.ad46e153.akpm@linux-foundation.org> <20070521160029.GA28715@elte.hu> <5486cca80705220315oe4a42a2x366cff682333075c@mail.gmail.com> <200705222020.58474.kernel@kolivas.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200705222020.58474.kernel@kolivas.org> Sender: owner-linux-mm@kvack.org Return-Path: To: Con Kolivas Cc: Antonino Ingargiola , Nick Piggin , Ray Lee , ck list , Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: * Con Kolivas wrote: > > > there was nothing else running on the system - so i suspect the > > > swapin activity flagged 'itself' as some 'other' activity and > > > stopped? The swapins happened in 4 bursts, separated by 5 seconds > > > total idleness. > > > > I've noted burst swapins separated by some seconds of pause in my > > desktop system too (with sp_tester and an idle gnome). > > That really is expected, as just about anything, including journal > writeout, would be enough to put it back to sleep for 5 more seconds. note that nothing like that happened on my system - in the swap-prefetch-off case there was _zero_ IO activity during the sleep period. Ingo -- 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