From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sat, 16 Feb 2002 18:32:11 -0200 (BRST) From: Rik van Riel Subject: Re: [PATCH] shrink struct page for 2.5 In-Reply-To: <20020216212327.C4777@suse.de> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Dave Jones Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On Sat, 16 Feb 2002, Dave Jones wrote: > On Sat, Feb 16, 2002 at 06:15:03PM -0200, Rik van Riel wrote: > > I've forward-ported a small part of the -rmap patch to 2.5, > > the shrinkage of the struct page. Most of this code is from > > William Irwin and Christoph Hellwig. > > Anton Blanchard did some nice benchmarks of this work a while > ago, and noticed that with one of the features (I think the > I forget which its in the l-k archives somewhere) there > seemed to be a noticable performance degradation. > Of course, this was a dbench test, so how reflective this is > of real world is another story.. IIRC he got a performance increase from the page->wait removal ... but nothing too noticable either. > Maybe Randy Hron can throw it in with the next round of > kernel tests he does ? That would be interesting, though I don't expect this patch to change performance a lot. It is mostly useful for machines with highmem who have all their low memory eaten up by the mem_map[] array ;) > > Unfortunately I haven't managed to make 2.5.5-pre2 to boot on > > my machine, so I haven't been able to test this port of the > > patch to 2.5. > > Just a complete lock up ? oops ? anything ? It's just locking up. Here are the last 3 lines, after that nothing happens at all... hdc: WDC WD84AA, ATA DISK drive ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx ide1 at 0x170-0x177,0x376 on irq 15 regards, Rik -- "Linux holds advantages over the single-vendor commercial OS" -- Microsoft's "Competing with Linux" document http://www.surriel.com/ http://distro.conectiva.com/ -- 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/