From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sasl.smtp.pobox.com (a-sasl-fastnet.sasl.smtp.pobox.com [207.106.133.19]) by ozlabs.org (Postfix) with ESMTP id 5897BDE328 for ; Fri, 25 Jul 2008 05:40:07 +1000 (EST) Received: from localhost.localdomain (localhost [127.0.0.1]) by a-sasl-fastnet.sasl.smtp.pobox.com (Postfix) with ESMTP id 3DDE83548B for ; Thu, 24 Jul 2008 15:40:01 -0400 (EDT) Received: from thinkcentre (cpe-67-9-156-46.austin.res.rr.com [67.9.156.46]) by a-sasl-fastnet.sasl.smtp.pobox.com (Postfix) with ESMTPA id E12EA3548A for ; Thu, 24 Jul 2008 15:40:00 -0400 (EDT) Date: Thu, 24 Jul 2008 14:38:28 -0500 From: Nathan Lynch To: linuxppc-dev@ozlabs.org Subject: Re: lockdep badness Message-ID: <20080724193828.GF9594@localdomain> References: <20080724192300.GE9594@localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20080724192300.GE9594@localdomain> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Nathan Lynch wrote: > > A couple of stack traces below, the first is from benh's tree, the > second is from 2.6.26. The lockdep self-tests all pass at boot. Sorry, should have pointed out the code that is warning more specifically. > RTAS daemon started > RTAS: event: 295, Type: Dump Notification Event, Severity: 2 > ------------[ cut here ]------------ > Badness at kernel/lockdep.c:2719 check_flags(): if (irqs_disabled_flags(flags)) { if (DEBUG_LOCKS_WARN_ON(current->hardirqs_enabled)) { printk("possible reason: unannotated irqs-off.\n"); } } else { >>> if (DEBUG_LOCKS_WARN_ON(!current->hardirqs_enabled)) { printk("possible reason: unannotated irqs-on.\n"); } } > NIP: c0000000000b06dc LR: c0000000000b06c0 CTR: 0000000000000000 > REGS: c0000000e787b9a0 TRAP: 0700 Not tainted (2.6.26) > MSR: 8000000000029032 CR: 24000042 XER: 20000000 > TASK = c0000000e91a6100[428] 'rtasd' THREAD: c0000000e7878000 CPU: 1 > GPR00: 0000000000000000 c0000000e787bc20 c000000000a71270 0000000000000001 > GPR04: 0000000000000001 c00000000004d648 0000040100000000 0000040100000000 > GPR08: 0000000000000000 c000000000f1f858 0000000000000020 0000000000000001 > GPR12: 0000000000010000 c000000000aac600 00000000002146f4 0000000000214744 > GPR16: 4000000002040000 00000000029015b0 00000000002a3c00 c0000000008cc988 > GPR20: 0000000002901598 0000000000000000 0000000000000124 0000000000000002 > GPR24: 0000000000000001 0000000000000008 0000000000000001 c0000000009fdf00 > GPR28: c00000000004d648 c000000000943e98 c0000000009d9b40 c0000000e787bc20 > NIP [c0000000000b06dc] .check_flags+0x9c/0x174 > LR [c0000000000b06c0] .check_flags+0x80/0x174 > Call Trace: > [c0000000e787bc20] [c0000000e787bc70] 0xc0000000e787bc70 (unreliable) > [c0000000e787bca0] [c0000000000b5ac8] .lock_release+0x7c/0x208 > [c0000000e787bd50] [c0000000005e12c0] ._spin_unlock_irqrestore+0x34/0x94 > [c0000000e787bde0] [c00000000004d648] .pSeries_log_error+0x380/0x3f0 > [c0000000e787bef0] [c00000000004d8e4] .rtasd+0x98/0x100 > [c0000000e787bf90] [c000000000029d20] .kernel_thread+0x4c/0x68 > Instruction dump: > e92d01b0 80090904 2f800000 40be002c 481ece4d 60000000 2fa30000 419e00c4 > e93e80c0 80090000 2f800000 409e00b4 <0fe00000> 480000ac 78290464 80090014 > possible reason: unannotated irqs-on. > irq event stamp: 20 > hardirqs last enabled at (19): [] .trace_hardirqs_on+0x1c/0x3 > 0 > hardirqs last disabled at (20): [] .trace_hardirqs_off+0x1c/0x > 30 > softirqs last enabled at (0): [] .copy_process+0x3c8/0x1040 > softirqs last disabled at (0): [<0000000000000000>] 0x0 > > =============== > > ipr: IBM Power RAID SCSI Device Driver version: 2.4.1 (April 24, 2007) > ipr 0000:00:01.0: Found IOA with IRQ: 289 > ipr 0000:00:01.0: Starting IOA initialization sequence. > ipr 0000:00:01.0: Adapter firmware version: 02200023 > ipr 0000:00:01.0: IOA initialized. > ------------[ cut here ]------------ > Badness at kernel/lockdep.c:2037 trace_hardirqs_on(): if (DEBUG_LOCKS_WARN_ON(!irqs_disabled())) return; >>> if (DEBUG_LOCKS_WARN_ON(current->hardirq_context)) return; > NIP: c0000000000b29fc LR: c0000000000b29e0 CTR: 0000000000000000 > REGS: c00000000fffb890 TRAP: 0700 Not tainted (2.6.26) > MSR: 8000000000021032 CR: 28000022 XER: 00000004 > TASK = c000000000996730[0] 'swapper' THREAD: c000000000a60000 CPU: 0 > GPR00: 0000000000000000 c00000000fffbb10 c000000000a61ad8 0000000000000001 > GPR04: 0000000000035112 c000000000426708 0000000000000000 0000000000000970 > GPR08: 0000000000000000 c000000000ec6ad0 0000000000000001 0000000000000001 > GPR12: 0000000000043bd8 c000000000a9d400 00000000002146f4 0000000000214744 > GPR16: 4000000002040000 00000000028f37a8 00000000002a3c00 c0000000008b3790 > GPR20: 00000000028f3790 0000000001a3f920 c0000000008b37a8 c0000000e6252000 > GPR24: c0000000e6454a48 0000000000100100 0000000000200200 c0000000005d8824 > GPR28: c000000000afba18 c000000000996730 c0000000009cb7f0 c00000000fffbb10 > NIP [c0000000000b29fc] .trace_hardirqs_on+0x120/0x1b0 > LR [c0000000000b29e0] .trace_hardirqs_on+0x104/0x1b0 > Call Trace: > [c00000000fffbb10] [c00000000fffbbb0] 0xc00000000fffbbb0 (unreliable) > [c00000000fffbbb0] [c0000000005d8824] ._spin_unlock_irq+0x40/0x68 > [c00000000fffbc40] [c000000000426708] .ipr_ioa_reset_done+0x218/0x2ac > [c00000000fffbd00] [c00000000041bdb8] .ipr_reset_ioa_job+0xc8/0xf4 > [c00000000fffbd90] [c000000000424ffc] .ipr_isr+0x280/0x628 > [c00000000fffbe50] [c0000000000ccc70] .handle_IRQ_event+0x58/0xd4 > [c00000000fffbef0] [c0000000000cef4c] .handle_fasteoi_irq+0x128/0x1c8 > [c00000000fffbf90] [c000000000029918] .call_handle_irq+0x1c/0x2c > [c000000000a63a20] [c00000000000d9cc] .do_IRQ+0x138/0x248 > [c000000000a63ad0] [c000000000004ca8] hardware_interrupt_entry+0x28/0x2c > --- Exception: 501 at .raw_local_irq_restore+0x8c/0xa4 > LR = .cpu_idle+0x140/0x210 > [c000000000a63e60] [c0000000005da07c] .rest_init+0x7c/0x98 > [c000000000a63ee0] [c000000000866f10] .start_kernel+0x488/0x4b0 > [c000000000a63f90] [c000000000008584] .start_here_common+0x4c/0xc8 > Instruction dump: > e92d01b0 80090954 2f800000 41be002c 481e61fd 60000000 2fa30000 419e0080 > e93e80c0 80090000 2f800000 409e0070 <0fe00000> 48000068 7fa3eb78 38800001 > scsi0 : IBM 572C Storage Adapter > scsi 0:3:0:0: Direct-Access IBM-ESXS ST973402SS B522 PQ: 0 ANSI: 5