Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261352AbVBVTB0 (ORCPT ); Tue, 22 Feb 2005 14:01:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261332AbVBVS7i (ORCPT ); Tue, 22 Feb 2005 13:59:38 -0500 Received: from omx2-ext.sgi.com ([192.48.171.19]:30101 "EHLO omx2.sgi.com") by vger.kernel.org with ESMTP id S261326AbVBVS70 (ORCPT ); Tue, 22 Feb 2005 13:59:26 -0500 Message-ID: <421B8203.9080308@sgi.com> Date: Tue, 22 Feb 2005 13:03:31 -0600 From: Ray Bryant User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.2) Gecko/20040805 Netscape/7.2 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Andrew Morton CC: Paul Jackson , mingo@elte.hu, mort@wildopensource.com, linux-kernel@vger.kernel.org, hilgeman@sgi.com Subject: Re: [PATCH/RFC] A method for clearing out page cache References: <20050214154431.GS26705@localhost> <20050214193704.00d47c9f.pj@sgi.com> <20050221192721.GB26705@localhost> <20050221134220.2f5911c9.akpm@osdl.org> <421A607B.4050606@sgi.com> <20050221144108.40eba4d9.akpm@osdl.org> <20050222075304.GA778@elte.hu> <20050222032633.5cb38abb.pj@sgi.com> <20050222104535.0b3a3c65.akpm@osdl.org> In-Reply-To: <20050222104535.0b3a3c65.akpm@osdl.org> 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 Content-Length: 1313 Lines: 37 Andrew Morton wrote: > Paul Jackson wrote: > >> As Martin wrote, when he submitted this patch: >> > The motivation for this patch is for setting up High Performance >> > Computing jobs, where initial memory placement is very important to >> > overall performance. >> >> Any left over cache is wrong, for this situation. > > > So... Cannot the applicaiton remove all its pagecache with posix_fadvise() > prior to exitting? > Even if we modified all applications to do this, it still wouldn't help for dirty page cache, which would eventually become cleaned, and hang around long after the application has departed. But the previous statement has a false hypothesis, namely, that we could change all applications to do this. -- Best Regards, Ray ----------------------------------------------- Ray Bryant 512-453-9679 (work) 512-507-7807 (cell) raybry@sgi.com raybry@austin.rr.com The box said: "Requires Windows 98 or better", so I installed Linux. ----------------------------------------------- - 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/