From: "Chakri n" Subject: Re: A unresponsive file system can hang all I/O in the system on linux-2.6.23-rc6 (dirty_thresh problem?) Date: Fri, 28 Sep 2007 02:20:28 -0700 Message-ID: <92cbf19b0709280220o7cdd4b1cua37a8776af68ac25@mail.gmail.com> References: <92cbf19b0709272332s25684643odaade0e98cb3a1f4@mail.gmail.com> <20070927235034.ae7bd73d.akpm@linux-foundation.org> <1190962752.31636.15.camel@twins> <92cbf19b0709280127yba48b60wfe58e532944894ca@mail.gmail.com> <1190968800.31636.26.camel@twins> <92cbf19b0709280201o3778f945mf1d8d61cbb3d0558@mail.gmail.com> <1190970729.31636.29.camel@twins> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Cc: Andrew Morton , nfs@lists.sourceforge.net, linux-pm , lkml To: "Peter Zijlstra" Return-path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.91] helo=mail.sourceforge.net) by sc8-sf-list2-new.sourceforge.net with esmtp (Exim 4.43) id 1IbC1I-0000tW-Ej for nfs@lists.sourceforge.net; Fri, 28 Sep 2007 02:20:24 -0700 Received: from wa-out-1112.google.com ([209.85.146.180]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1IbC1N-0004RZ-DJ for nfs@lists.sourceforge.net; Fri, 28 Sep 2007 02:20:29 -0700 Received: by wa-out-1112.google.com with SMTP id k22so4451241waf for ; Fri, 28 Sep 2007 02:20:29 -0700 (PDT) In-Reply-To: <1190970729.31636.29.camel@twins> List-Id: "Discussion of NFS under Linux development, interoperability, and testing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: nfs-bounces@lists.sourceforge.net Errors-To: nfs-bounces@lists.sourceforge.net It's 2.6.23-rc6. Thanks --Chakri On 9/28/07, Peter Zijlstra wrote: > On Fri, 2007-09-28 at 02:01 -0700, Chakri n wrote: > > Thanks for explaining the adaptive logic. > > > > > However other devices will at that moment try to maintain a limit of 0, > > > which ends up being similar to a sync mount. > > > > > > So they'll not get stuck, but they will be slow. > > > > > > > > > > Sync should be ok, when the situation is bad like this and some one > > hijacked all the buffers. > > > > But, I see my simple dd to write 10blocks on local disk never > > completes even after 10 minutes. > > > > [root@h46 ~]# dd if=/dev/zero of=/tmp/x count=10 > > > > I think the process is completely stuck and is not progressing at all. > > > > Is something going wrong in the calculations where it does not fall > > back to sync mode. > > What kernel is that? > > > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs