From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 25 Jun 2001 20:34:00 +0200 From: Jens Axboe Subject: Re: 2.4.6pre3: kswapd dominating CPU Message-ID: <20010625203400.D3327@suse.de> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: ; from matt_zinkevicius@hp.com on Mon, Jun 18, 2001 at 05:12:44PM -0700 Resent-To: matt_zinkevicius@hp.com, linux-mm@kvack.org Resent-Message-Id: Sender: owner-linux-mm@kvack.org Return-Path: To: "ZINKEVICIUS,MATT (HP-Loveland,ex1)" Cc: "'linux-mm@kvack.org'" List-ID: On Mon, Jun 18 2001, ZINKEVICIUS,MATT (HP-Loveland,ex1) wrote: > [...] This seems related > to whether we enable highmem in the kernel, as this problem only appears > when highmem is set to 4GB or 64GB. Any hints? > > Server specs: > HP LT6000r server > 4 x 700Mhz P3Xeons > 4GB RAM > 1GB swap partition > 2.4.6pre3 kernel WIth a machine spec'ed like that, you might want to try with the zero-bounce patches for highmem machines. Running out of memory and still requiring low mem bounce buffers can get ugly -- the patches won't solve any vm issues, but they should solve the problem for you (and boost your specsfs performance a good deal). Haven't had time to update to 2.4.6-pre3 yet, if these don't apply let me know: *.kernel.org/pub/linux/kernel/people/axboe/patches/2.4.5/block-highmem-all-4.bz2 Dunno what I/O controller you used... -- Jens Axboe -- 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/