Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268089AbUJCTW3 (ORCPT ); Sun, 3 Oct 2004 15:22:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268092AbUJCTW2 (ORCPT ); Sun, 3 Oct 2004 15:22:28 -0400 Received: from pat.uio.no ([129.240.130.16]:62680 "EHLO pat.uio.no") by vger.kernel.org with ESMTP id S268089AbUJCTV4 convert rfc822-to-8bit (ORCPT ); Sun, 3 Oct 2004 15:21:56 -0400 Subject: Re: [RFC] memory defragmentation to satisfy high order allocations From: Trond Myklebust To: Hirokazu Takahashi Cc: Marcelo Tosatti , iwamoto@valinux.co.jp, haveblue@us.ibm.com, Andrew Morton , linux-mm@kvack.org, piggin@cyberone.com.au, arjanv@redhat.com, linux-kernel@vger.kernel.org In-Reply-To: <20041004.033559.71092746.taka@valinux.co.jp> References: <20041002183349.GA7986@logos.cnet> <20041003.131338.41636688.taka@valinux.co.jp> <20041003140723.GD4635@logos.cnet> <20041004.033559.71092746.taka@valinux.co.jp> Content-Type: text/plain; charset=iso-8859-1 Message-Id: <1096831287.9667.61.camel@lade.trondhjem.org> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Sun, 03 Oct 2004 21:21:27 +0200 Content-Transfer-Encoding: 8BIT X-MailScanner-Information: This message has been scanned for viruses/spam. Contact postmaster@uio.no if you have questions about this scanning X-UiO-MailScanner: No virus found X-UiO-Spam-info: not spam, SpamAssassin (score=0, required 12) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 895 Lines: 23 P? su , 03/10/2004 klokka 20:35, skreiv Hirokazu Takahashi: > Pages for NFS also might be pinned with network problems. > One of the ideas is to restrict NFS to allocate pages from > specific memory region, sot that all memory except the region > can be hot-removed. And it's possible to implementing whole > migrate_page method, which may handled stuck pages. Why do you want to special-case this? The above is a generic condition: any filesystem can suffer from the equivalent problem of a failure or slow response in the underlying device. Making an NFS-specific hack is just counter-productive to solving the generic problem. Cheers, Trond - 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/