From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935247AbYEBQpw (ORCPT ); Fri, 2 May 2008 12:45:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S934104AbYEBQpJ (ORCPT ); Fri, 2 May 2008 12:45:09 -0400 Received: from rv-out-0506.google.com ([209.85.198.233]:8133 "EHLO rv-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934031AbYEBQpG (ORCPT ); Fri, 2 May 2008 12:45:06 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=epCyEoHVCuVZcFZuk8Qw1XaSKgQZN2XX0mYAOkd5wzVTNVbWnPc9YId/6cyM7juShyas7EiujmoinMrhxkdKCh0UfQrXsG4mempg4YpBQZnO738uPqNUG3IGrqmvJ2A/sfQgsaKIkaSdMoGOS9WuvL/ox8sbPx0fzymUxp/Pn64= Message-ID: <2c0942db0805020945i2f46a41dl28cdcec25c9e2ac3@mail.gmail.com> Date: Fri, 2 May 2008 09:45:04 -0700 From: "Ray Lee" To: "Jesper Krogh" Subject: Re: Many open/close on same files yeilds "No such file or directory". Cc: "Andrew Morton" , linux-kernel@vger.kernel.org In-Reply-To: <481B395E.5070505@krogh.cc> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <4819E316.7000607@krogh.cc> <20080501223938.921f7cd2.akpm@linux-foundation.org> <481ACEC4.2040205@krogh.cc> <481B3115.30705@krogh.cc> <2c0942db0805020847q2fdc0480m3eb892bf2bd0b3a@mail.gmail.com> <481B395E.5070505@krogh.cc> X-Google-Sender-Auth: f9fe26a3f464eea3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 2, 2008 at 8:55 AM, Jesper Krogh wrote: > > Ray Lee wrote: > > > On Fri, May 2, 2008 at 8:19 AM, Jesper Krogh wrote: > > > > > Jesper Krogh wrote: > > > > > > > > > > > > > > > I'd suspect that after 1e8 loops your CPU got too hot and started to > > > > > misbehave. > > > > > > > > > > > > > > Hardware is an Sun Fire X4600 (8xdual-core AMD64 processors). The > > > > problem seem to be tied to this filesystem. (I cannot havent been able > > > > to reproduce it on the /-mounted disk of the same system. So if a cpu > > > > problem.. then it shouldn't be tied to a specific filesystem? > > > > > > > > This is the only activity on the system .. so a load of 1 / 16cpus. > > > > > > > > > > > I've tried to explore this suggestion (the best I could). > > > > > > There are 2 ext3 filesystems locally mounted. / and this one. Running > 16 > > > parallel runs of this program on a file on the /-mounted filesystem > cannot > > > reproduce the problem. If it was linked to hot hardware, I believe I > should > > > be able to reproduce it this way. The servers are in a 17 degress > > > serverroom. > > > > > > It changes alot when.. it actually happens. The "earliest ones" has > been > > > from 200000 cycles. > > > > > > > Run 16 in parallel on /, and another 16 simultaneously on the trouble > > filesystem? If you continue to get errors only on the 'trouble' > > filesystem, and no errors start occurring on / coincident, then it > > sounds pretty localized. > > > > That test has been done. I can only reproduce it on this filesystem. But I > cannot really conclude that it is only present there.. since sometimes my > testprogram just goes on .. and dies past 1 billion cycles. But I have never > gotten errors from the / filesystem on the same installation. Sorry for belaboring the point, but reading up-thread I see you ran both / and /troublefs one after the other, but you're saying you also ran them at the same time? If so, that would seem to conclusively rule out hardware overheating.