From mboxrd@z Thu Jan 1 00:00:00 1970 From: Olaf Kirch Subject: NFS direct IO needs page lock? Date: Tue, 15 Feb 2005 21:36:54 +0100 Message-ID: <20050215203654.GA15634@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.11] helo=sc8-sf-mx1.sourceforge.net) by sc8-sf-list2.sourceforge.net with esmtp (Exim 4.30) id 1D19RT-0000T0-1E for nfs@lists.sourceforge.net; Tue, 15 Feb 2005 12:37:07 -0800 Received: from cantor.suse.de ([195.135.220.2]) by sc8-sf-mx1.sourceforge.net with esmtp (TLSv1:DES-CBC3-SHA:168) (Exim 4.41) id 1D19RR-0007A5-GK for nfs@lists.sourceforge.net; Tue, 15 Feb 2005 12:37:06 -0800 Received: from hermes.suse.de (hermes-ext.suse.de [195.135.221.8]) (using TLSv1 with cipher EDH-RSA-DES-CBC3-SHA (168/168 bits)) (No client certificate requested) by Cantor.suse.de (Postfix) with ESMTP id 0DD1D147F72E for ; Tue, 15 Feb 2005 21:36:55 +0100 (CET) To: nfs@lists.sourceforge.net Sender: nfs-admin@lists.sourceforge.net Errors-To: nfs-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: Discussion of NFS under Linux development, interoperability, and testing. List-Post: List-Help: List-Subscribe: , List-Archive: Hi, I'm currently looking at a customer problem problem with weird VM oopses that is somehow related to a large application doing heavy NFS direct IO to/from a POSIX shmem area (hm, what application would *that* be :-). I haven't had a bright idea so far, and I'm not even convinced this is NFS related at all - but one thing that struck me as odd when meditated over the code today was that the directio code doesn't lock the pages in nfs_get_user_pages. Is that an oversight, or does it do that intentionally? Olaf -- Olaf Kirch | --- o --- Nous sommes du soleil we love when we play okir@suse.de | / | \ sol.dhoop.naytheet.ah kin.ir.samse.qurax ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs