From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 19 Jun 2001 11:26:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 19 Jun 2001 11:25:59 -0400 Received: from pixie.isr.ist.utl.pt ([193.136.138.97]:33036 "EHLO pixie.isr.ist.utl.pt") by vger.kernel.org with ESMTP id ; Tue, 19 Jun 2001 11:25:49 -0400 To: linux-kernel@vger.kernel.org Subject: random errors with bzip2 Mime-Version: 1.0 (generated by tm-edit 7.108) Content-Type: text/plain; charset=US-ASCII From: Rodrigo Ventura Date: 19 Jun 2001 16:25:28 +0100 Message-ID: X-Mailer: Gnus v5.6.45/XEmacs 21.1 - "Biscayne" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi. Let me first apologize if this message is at the wrong mailing list, but in fact I haven't the faintest idea to where shall I send this. Randomly bzip2 gives an crc error when checking a big bz2 file, e.g. linux-2.4.5.tar.bz2 (20M), in a particular machine (asus a7v, athlon@1.2G, 256M). The same file (with the same md5sum, NFS file system) gives no problem whatsoever on other machines. On the asus machine, sometimes the file is checked ok, other times it fails (crc error). When several bzip2 processes are launched at the same time for the same file, some of them fail, others return ok. These have been my latest observations: - avoiding shared IRQs (by moving PCI cards in different slots) seems to reduce probability of error; - fresh reboot seems to solve the problem, but after some hours of uptime, it comes again; - all machines are using 2.4.6-pre3, the file is local to the asus machine but NFS for the others. The local filesystem is *ReiserFS*; - bzip2 executable is ok (as far as md5sum); - it could be a memory problem, but if it were, lots of kernel oops were expected, right? - could it be a process pre-emption problem? (FPU?) the kernel is compiled for generic i586 (to be shared by several machines); - could it be a shared IRQ problem? I've been experiencing several problems (freeze) related with IRQ sharing on asus boards, but I'm not totally sure about this; - I've read some posts about file shifting, can it cause these kinds of bzip problems? Cheers, -- *** Rodrigo Martins de Matos Ventura *** Web page: http://www.isr.ist.utl.pt/~yoda *** Teaching Assistant and PhD Student at ISR: *** Instituto de Sistemas e Robotica, Polo de Lisboa *** Instituto Superior Tecnico, Lisboa, PORTUGAL *** PGP fingerprint = 0119 AD13 9EEE 264A 3F10 31D3 89B3 C6C4 60C6 4585