From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pat LaVarre Subject: given fs dies if SMP, if PREEMPT, if open two or more Date: 23 Oct 2003 16:17:44 -0600 Sender: linux-fsdevel-owner@vger.kernel.org Message-ID: <1066947463.13459.5.camel@patehci2> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from email-out2.iomega.com ([147.178.1.83]:16513 "EHLO email.iomega.com") by vger.kernel.org with ESMTP id S261831AbTJWWSD (ORCPT ); Thu, 23 Oct 2003 18:18:03 -0400 Received: from royntex01.iomegacorp.com (unknown [147.178.90.120]) by email.iomega.com (Postfix) with ESMTP id D98AC1E9F for ; Thu, 23 Oct 2003 16:18:02 -0600 (MDT) To: linux-fsdevel@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org You may have noticed, I recently arrived here in linux-fsdevel, committed to trying to help make linux udf.ko ever more perfect. Can anyone here advise me specifically what to try next? So far we've demoed some trouble in the linux-fsdevel thread "zeroes read back more often than appended". That trouble occurs if CONFIG_SMP, if CONFIG_PREEMPT, or if I append nonzero bytes to multiple files in a round robin sequence. That says to me something in udf.ko doesn't know how to reenter itself, right? So my next step is to try reading while writing, to see if that breaks also, right? No? What do you think? Once my random guesses of specific kinds of trivial stress cease to cause trouble, I figure I will then try the more complex: http://www.codemonkey.org.uk/cruft/ http://www.zip.com.au/~akpm/linux/patches/stuff/ http://ltp.sourceforge.net/ http://www.iozone.org http://www.google.com/search?q=postmark+linux http://www.connectathon.org/ http://www.google.com/search?q=bonnie+linux I mean to be asking what do you think I should try before risking the possibly less discovered troubles per hour of that alternative. What do you think? Pat LaVarre