From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264281AbTLAVgk (ORCPT ); Mon, 1 Dec 2003 16:36:40 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264282AbTLAVgk (ORCPT ); Mon, 1 Dec 2003 16:36:40 -0500 Received: from www14.mailshell.com ([209.157.66.246]:60613 "HELO mailshell.com") by vger.kernel.org with SMTP id S264281AbTLAVga (ORCPT ); Mon, 1 Dec 2003 16:36:30 -0500 Message-ID: <20031201213624.18232.qmail@mailshell.com> Date: Mon, 01 Dec 2003 23:36:20 +0200 X-Accept-Language: en-us, en MIME-Version: 1.0 Subject: Re: PROBLEM: 2.6test11 kernel panic on "head -1 /proc/net/tcp" References: <20031128170138.9513.qmail@mailshell.com> <87d6bc2yvq.fsf@devron.myhome.or.jp> <20031129170034.10522.qmail@mailshell.com> <1070242158.1110.150.camel@buffy> <3FCBAE6F.1090405@myrealbox.com> In-Reply-To: <3FCBAE6F.1090405@myrealbox.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit From: lkml-031128@amos.mailshell.com To: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi Jonathan, I'm not sure I understand - what exactly froze your machine? My machine used to freeze on "head -1 /proc/net/tcp" until I added that one-line suggested by Mr. Ogawa. After I added Ogawa's line, "head -1 /proc/net/tcp" stopped freezing my machine but PPP failed to work. Also after adding Ogawa's line, PPP works fine (as it is now, as I write this message) as long as I don't try "head -1 /proc/net/tcp" after boot. If I'll try "head -1 /proc/net/tcp" now PPP will stop working. So which situation did you confirm to reproduce? Thanks, --Amos Jonathan Fors wrote: > Thomas Cataldo wrote: > >> On Sat, 2003-11-29 at 18:00, lkml-031128@amos.mailshell.com wrote: >> >> >>> Partially. It seems to trigger ppp failure later. >>> >> >> [...] >> >> >>> This gives me tons of messages like the following: >>> >>> Badness in local_bh_enable at kernel/softirq.c:121 >>> Call Trace: >>> [] local_bh_enable+0x85/0x90 >>> [] ppp_async_push+0xa2/0x180 >>> [] ppp_asynctty_wakeup+0x2d/0x60 >>> [] pty_unthrottle+0x58/0x60 >>> [] check_unthrottle+0x3d/0x40 >>> [] n_tty_flush_buffer+0x13/0x60 >>> [] pty_flush_buffer+0x67/0x70 >>> [] do_tty_hangup+0x3f1/0x460 >>> [] release_dev+0x62c/0x660 >>> [] zap_pmd_range+0x4b/0x70 >>> [] unmap_page_range+0x43/0x70 >>> [] dput+0x22/0x210 >>> [] tty_release+0x2a/0x60 >>> [] __fput+0x108/0x120 >>> [] filp_close+0x59/0x90 >>> [] put_files_struct+0x54/0xc0 >>> [] do_exit+0x15d/0x3e0 >>> [] do_group_exit+0x3a/0xb0 >>> [] syscall_call+0x7/0xb >>> >> >> >> I just looked at my logs and realised I add a similar oops in my log. It >> happened a few days ago on 2.6.0-test10 (I failed to notice because >> everything seems to work fine). >> >> Here is what I have : >> >> Badness in local_bh_enable at kernel/softirq.c:121 >> Call Trace: >> [] local_bh_enable+0x93/0xa0 >> [] ppp_async_push+0xbd/0x1b0 [ppp_async] >> [] ppp_asynctty_wakeup+0x2e/0x70 [ppp_async] >> [] pty_unthrottle+0x59/0x60 >> [] check_unthrottle+0x3b/0x40 >> [] n_tty_flush_buffer+0x13/0x60 >> [] pty_flush_buffer+0x6d/0x70 >> [] pty_flush_buffer+0x0/0x70 >> [] do_tty_hangup+0x4e3/0x580 >> [] release_dev+0x742/0x780 >> [] __pagevec_free+0x1c/0x30 >> [] release_pages+0x7e/0x1a0 >> [] dput+0x31/0x270 >> [] tty_release+0x3b/0x90 >> [] __fput+0x10b/0x120 >> [] filp_close+0x59/0x90 >> [] put_files_struct+0x64/0xd0 >> [] do_exit+0x19f/0x4c0 >> [] do_group_exit+0x42/0xe0 >> [] sysenter_past_esp+0x52/0x71 >> >> The previous line in my logs was from my TI acx100 wifi card. It runs >> with the experimental driver from http://acx100.sf.net. So if this oops >> can be caused by bad driver behaviour, please ignore. >> >> I am using ppp with pppoe on a ne2k-pci network board. >> >> I have smp (dual-p3) and preemption enabled. The kernel is compiled with >> gcc 3.3.1-2 from debian sid. >> >> >> - >> To unsubscribe from this list: send the line "unsubscribe >> linux-kernel" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> Please read the FAQ at http://www.tux.org/lkml/ >> >> >> >> > I can verify that one, tried it on my pentium 2 and it froze the > machine (i was NOT root then) . Had to SysRQ the box to get up again. > > My machine is: > Dell Optiplek Gx1 > 350MhZ Pentium 2 Deschutes > 190 MB Pc100 SDRAM > Gentoo Linux 1.4 > GCC 3.2.3 > Kernel: 2.6.0-test11 modified only with bootsplash patch > Preempt ENABLED > > > > ---------- Your email is protected by Mailshell ---------- To block spam > or change delivery options: > http://www.mailshell.com/control.html?a=blue1spxa32bf9syihlatspyammgqquwzqnwz8k > > > ReturnPath.net http://rd.mailshell.com/ad481 > Earn up to $3 for each of your friends who signs up with Mailshell! > http://rd.mailshell.com/sp5