From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pat LaVarre Subject: Re: zeroes read back more often than appended Date: 08 Oct 2003 11:02:20 -0600 Sender: linux-fsdevel-owner@vger.kernel.org Message-ID: <1065632539.6625.52.camel@patehci2> References: <1065553341.8172.45.camel@patehci2> <20031007204951.A25423@falcon.csc.calpoly.edu> <1065631289.6625.34.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]:53921 "EHLO email.iomega.com") by vger.kernel.org with ESMTP id S261640AbTJHRCc (ORCPT ); Wed, 8 Oct 2003 13:02:32 -0400 To: linux-fsdevel@vger.kernel.org, linux_udf@hpesjro.fc.hp.com In-Reply-To: <1065631289.6625.34.camel@patehci2> List-Id: linux-fsdevel.vger.kernel.org > > ... 2.6.0-test6 ... > > CPU0: Intel(R) Pentium(R) 4 CPU 2.40GHz stepping 09 > > CPU1: Intel(R) Pentium(R) 4 CPU 2.40GHz stepping 09 > > ... read more zeroes than appended ... > > whats going on in 2.6.0-test6-smp ... I will confirm or deny that turning off my second cpu keeps zeroes from reading back after fopen, repeat fwrite, fclose file ... ... if/when I learn how to turn off my second cpu. Meanwhile, til I know better, I will blame `make defconfig` for having turned on my second cpu. Indeed immediately from that beginning, I see `grep -i smp .config` followed by `make xconfig` suggests I try the one-click "Processor type and features" "Symmetric multi-processing support" = No patch: -CONFIG_LOG_BUF_SHIFT=15 -CONFIG_NR_CPUS=8 -CONFIG_SMP=y -CONFIG_X86_EXTRA_IRQS=y -CONFIG_X86_FIND_SMP_CONFIG=y -CONFIG_X86_HT=y -CONFIG_X86_IO_APIC=y -CONFIG_X86_LOCAL_APIC=y -CONFIG_X86_MCE_P4THERMAL=y -CONFIG_X86_MPPARSE=y -CONFIG_X86_SMP=y -CONFIG_X86_TRAMPOLINE=y +# CONFIG_FTAPE is not set +# CONFIG_SMP is not set +# CONFIG_X86_UP_APIC is not set +CONFIG_BROKEN_ON_SMP=y +CONFIG_LOG_BUF_SHIFT=14 I will try this patch and report back. Pat LaVarre