Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755897AbYAUU6y (ORCPT ); Mon, 21 Jan 2008 15:58:54 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752822AbYAUU6q (ORCPT ); Mon, 21 Jan 2008 15:58:46 -0500 Received: from hoefnix.telenet-ops.be ([195.130.132.54]:41653 "EHLO hoefnix.telenet-ops.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752672AbYAUU6p convert rfc822-to-8bit (ORCPT ); Mon, 21 Jan 2008 15:58:45 -0500 Subject: 2.6.24 regression: pan hanging unkilleable and un-straceable From: Frederik Himpe To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset=UTF-8 Date: Mon, 21 Jan 2008 21:58:06 +0100 Message-Id: <1200949086.6648.19.camel@Anastacia> Mime-Version: 1.0 X-Mailer: Evolution 2.21.5-1mdv2008.1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3354 Lines: 50 With Linux 2.6.24-rc8 I often have the problem that the pan usenet reader starts using 100% of CPU time after some time. When this happens, kill -9 does not work, and strace just hangs when trying to attach to the process. The same with gdb. ps shows the process as being in the R state. I pressed Ctrl-Alt-SysRq-T, and this was shown for pan: Jan 21 21:45:01 Anastacia kernel: pan R running task 0 8063 1 Jan 21 21:45:01 Anastacia kernel: ssh S 0000000000000000 0 8323 6809 Jan 21 21:45:01 Anastacia kernel: ffff81000a51f9c8 0000000000000082 ffff81000ed6dc00 ffffffff8045ad6f Jan 21 21:45:01 Anastacia kernel: ffffffff805875b8 ffffffff80623980 ffffffff80623980 ffffffff80623980 Jan 21 21:45:01 Anastacia kernel: ffffffff8061fe80 ffffffff80623980 ffff81003941b8a8 ffffffff8043142b Jan 21 21:45:01 Anastacia kernel: Call Trace: Jan 21 21:45:01 Anastacia kernel: [arp_bind_neighbour+143/208] arp_bind_neighbour+0x8f/0xd0 Jan 21 21:45:01 Anastacia kernel: [rt_intern_hash+955/1056] rt_intern_hash+0x3bb/0x420 Jan 21 21:45:01 Anastacia kernel: [nommu_map_single+56/96] nommu_map_single+0x38/0x60 Jan 21 21:45:01 Anastacia kernel: [schedule_timeout+149/208] schedule_timeout+0x95/0xd0 Jan 21 21:45:01 Anastacia kernel: [tty_ldisc_deref+82/128] tty_ldisc_deref+0x52/0x80 Jan 21 21:45:01 Anastacia kernel: [tty_poll+145/160] tty_poll+0x91/0xa0 Jan 21 21:45:01 Anastacia kernel: [do_select+1128/1376] do_select+0x468/0x560 Jan 21 21:45:01 Anastacia kernel: [__pollwait+0/304] __pollwait+0x0/0x130 Jan 21 21:45:01 Anastacia kernel: [default_wake_function+0/16] default_wake_function+0x0/0x10 Jan 21 21:45:01 Anastacia kernel:last message repeated 2 times Jan 21 21:45:01 Anastacia kernel: [enqueue_task+19/48] enqueue_task+0x13/0x30 Jan 21 21:45:01 Anastacia kernel: [try_to_wake_up+98/720] try_to_wake_up+0x62/0x2d0 Jan 21 21:45:01 Anastacia kernel: [default_wake_function+0/16] default_wake_function+0x0/0x10 Jan 21 21:45:01 Anastacia kernel: [tcp_recvmsg+1463/3360] tcp_recvmsg+0x5b7/0xd20 Jan 21 21:45:01 Anastacia kernel: [__wake_up_common+90/144] __wake_up_common+0x5a/0x90 Jan 21 21:45:01 Anastacia kernel: [__wake_up+67/112] __wake_up+0x43/0x70 Jan 21 21:45:01 Anastacia kernel: [n_tty_receive_buf+821/3888] n_tty_receive_buf+0x335/0xf30 Jan 21 21:45:01 Anastacia kernel: [sock_aio_read+349/368] sock_aio_read+0x15d/0x170 Jan 21 21:45:01 Anastacia kernel: [core_sys_select+521/768] core_sys_select+0x209/0x300 Jan 21 21:45:01 Anastacia kernel: [remove_wait_queue+25/96] remove_wait_queue+0x19/0x60 Jan 21 21:45:01 Anastacia kernel: [__wake_up+67/112] __wake_up+0x43/0x70 Jan 21 21:45:01 Anastacia kernel: [tty_ldisc_deref+82/128] tty_ldisc_deref+0x52/0x80 Jan 21 21:45:01 Anastacia kernel: [tty_write+569/592] tty_write+0x239/0x250 Jan 21 21:45:01 Anastacia kernel: [sys_select+68/448] sys_select+0x44/0x1c0 Jan 21 21:45:01 Anastacia kernel: [sys_write+83/144] sys_write+0x53/0x90 Jan 21 21:45:01 Anastacia kernel: [system_call+126/131] system_call+0x7e/0x83 What could be causing this problem? -- Frederik Himpe -- 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/