Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262622AbTI1RTp (ORCPT ); Sun, 28 Sep 2003 13:19:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262632AbTI1RTp (ORCPT ); Sun, 28 Sep 2003 13:19:45 -0400 Received: from natsmtp00.webmailer.de ([192.67.198.102]:43511 "EHLO natsmtp00.webmailer.de") by vger.kernel.org with ESMTP id S262622AbTI1RTn (ORCPT ); Sun, 28 Sep 2003 13:19:43 -0400 Message-ID: <3F771893.1020405@softhome.net> Date: Sun, 28 Sep 2003 19:21:23 +0200 From: "Ihar 'Philips' Filipau" Organization: Home Sweet Home User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5b) Gecko/20030831 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Mikulas Patocka CC: Linux Kernel Mailing List Subject: Re: [OT] No Swap. Re: [BUG 2.6.90-test5] kernel shits itself with 48mb ram under moderate load References:

<3F75EC3B.4030305@softhome.net> <20030927202148.GA31080@k3.hellgate.ch> <3F76DCEC.60508@softhome.net> In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Mikulas Patocka wrote: >>>Oh, it does matter. My workstation has 1 GB RAM and 2 GB swap and I hardly >>>see any problems with paging . >> >> Because your workload doesn't hit the 1GB limit. >> Actually we just do not have fast enough I/O + CPU to utilize 1GB of >>RAM efficiently. >> >> But if you will go into 128MB of RAM - you will see difference, where >>should be no difference. >> >> Let's say (my personal exp.) cp'ing of kernel source with 0.5/0.25 GB >>RAM dosn't differ. Aproximately the same time. 0.25GB little bit faster >>- but it can be written off to noise. But try to do the same cp with >>0.125GB - this cp (as of RH 2.4.20-20.9 +ext3 -swap) takes _*two*_ times >>longer. Should it be? > > Yes, it should. If you have 0.25GB, it can be copied into cache. If you > have 0.125GB, it doesn't fit there. > So you want to say to effectively copy (or whatever) 40GB harddrive I have to have 40GB of RAM? Ridiculous. Especially if copying is done in 4k lumps. (cp's default buffer) Hopefully not everyone shares your opinion. -- Ihar 'Philips' Filipau / with best regards from Saarbruecken. -- "... and for $64000 question, could you get yourself vaguely familiar with the notion of on-topic posting?" -- Al Viro @ LKML - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/