Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753112AbXJWNzn (ORCPT ); Tue, 23 Oct 2007 09:55:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751932AbXJWNzg (ORCPT ); Tue, 23 Oct 2007 09:55:36 -0400 Received: from anchor-post-34.mail.demon.net ([194.217.242.92]:4900 "EHLO anchor-post-34.mail.demon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751920AbXJWNzf (ORCPT ); Tue, 23 Oct 2007 09:55:35 -0400 Subject: mm: soft lockup in 2.6.23-6636. caused by drop_caches ? From: richard kennedy To: lkml , linux-mm Content-Type: text/plain Date: Tue, 23 Oct 2007 14:55:28 +0100 Message-Id: <1193147728.3044.18.camel@castor.rsk.org> Mime-Version: 1.0 X-Mailer: Evolution 2.10.3 (2.10.3-4.fc7) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3440 Lines: 76 on git v2.6.23-6636-g557ebb7 I'm getting a soft lockup when running a simple disk write test case on AMD64X2, sata hd & ext3. the test does this sync echo 3 > /proc/sys/vm/drop_caches for (( i=0; $i < $count; i=$i+1 )) ; do dd if=large_file of=copy_file_$i bs=4k & done It never recovers once the lockup occurs and this message repeats on the console :- BUG: soft lockup - CPU#0 stuck for 11s! [kjournald:456] CPU 0: Pid: 456, comm: kjournald Not tainted 2.6.23 #1 RIP: 0010:[] [] _spin_lock+0x5/0xf RSP: 0018:ffff8100096e3db8 EFLAGS: 00000286 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000000015 RDX: 0000000000200000 RSI: 0000000000000004 RDI: ffffffff81378f80 RBP: ffff8100096e3da0 R08: 0000000000000021 R09: 0000000000000000 R10: ffffe2000142b7c0 R11: 00000000fffffffa R12: ffff8100096e3d90 R13: ffffffff812430b2 R14: ffff810006402bd0 R15: ffff81007fba7000 FS: 00002b3cf6460090(0000) GS:ffffffff813aa000(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: 00002afa6e20b000 CR3: 000000000d6ba000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: [] wake_bit_function+0x0/0x23 [] __mark_inode_dirty+0xe0/0x168 [] __set_page_dirty+0x112/0x11e [] :jbd:__journal_unfile_buffer+0x9/0x13 [] :jbd:journal_commit_transaction+0xb3d/0xd1a [] lock_timer_base+0x26/0x4b [] :jbd:kjournald+0xc3/0x1e6 [] autoremove_wake_function+0x0/0x2e [] :jbd:kjournald+0x0/0x1e6 [] kthread+0x47/0x75 [] child_rip+0xa/0x12 [] kthread+0x0/0x75 [] child_rip+0x0/0x12 BUG: soft lockup - CPU#1 stuck for 11s! [bash:3428] CPU 1: Pid: 3428, comm: bash Not tainted 2.6.23 #1 RIP: 0010:[] [] _spin_lock+0x7/0xf RSP: 0018:ffff810009163d80 EFLAGS: 00000286 RAX: 0000000000208029 RBX: ffff81004a895b40 RCX: 0000000000000001 RDX: ffff81004a895b40 RSI: ffffe20000a844b0 RDI: ffff8100095bb954 RBP: 0000000000000000 R08: 0000000000001000 R09: 0000000000000002 R10: ffff810009459230 R11: ffffffff88035a41 R12: ffffffff810700f4 R13: 0000000000000246 R14: ffff81000000d780 R15: ffffe20001bd6d90 FS: 00002b58a941ef40(0000) GS:ffff810006801700(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 000000362b8676e0 CR3: 000000000eddf000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: [] :jbd:journal_try_to_free_buffers+0x7e/0x124 [] __invalidate_mapping_pages+0x81/0x103 [] drop_pagecache+0x74/0xe6 [] drop_caches_sysctl_handler+0x1a/0x2f [] proc_sys_write+0x7c/0xa4 [] vfs_write+0xc6/0x16f [] sys_write+0x45/0x6e [] tracesys+0xdc/0xe1 Richard - 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/