* Jens Axboe <jens.axboe@xxxxxxxxxx> [2008-12-16 15:37:21]: > On Tue, Dec 16 2008, Kamalesh Babulal wrote: > > * Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> [2008-12-12 14:16:11]: > > > > > On Sat, Dec 13, 2008 at 01:10:26AM +0530, Kamalesh Babulal wrote: > > > > * Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> [2008-12-10 10:33:02]: > > > > > > > > > On Wed, Dec 10, 2008 at 11:39:36PM +0530, Kamalesh Babulal wrote: > > > > > > * Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> [2008-12-10 09:53:38]: > > > > > > > > > > > > > On Wed, Dec 10, 2008 at 10:00:07PM +0530, Kamalesh Babulal wrote: > > > > > > > > * Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> [2008-12-10 06:54:14]: > > > > > > > > > > > > > > > > > On Wed, Dec 10, 2008 at 05:27:21PM +0530, Kamalesh Babulal wrote: > > > > > > > > > > Hi, > > > > > > > > > > > > > > > > > > > > Kernel bug is hit while booting up the next-20081208/09 kernels over > > > > > > > > > > the x86_64 box. The IP is pointing to 0x0 and its stuck at > > > > > > > > > > __rcu_process_callbacks. > > > > > > > > > > > > > > > > > > Kernel config? > > > > > > > > > > > > > > > > > > Thanx, Paul > > > > > > > > > > > > > > > > > Hi Paul, > > > > > > > > > > > > > > > > I have attached the kernel config file. > > > > > > > > > > > > > > Hello, Kamalesh, > > > > > > > > > > > > > > No significant recent changes in this area. Is this consistent? > > > > > > > Any chance of "git bisect"? > > > > > > > > > > > > > > Thanx, Paul > > > > > > > > > > > > > Hi Paul, > > > > > > > > > > > > I tried reproducing it for three times and I was successfull in reproducing it thrice. > > > > > > I have already started the git bisect, will update the results soon. > > > > > > > > > > Very good, looking forward to seeing the result! > > > > > > > > > > Thanx, Paul > > > > > > > > > Hi Paul, > > > > > > > > After a Complete round of git bisect, I was not able to reproduce the oops, > > > > but when I tried again with complete next-20081209 patch, I am getting > > > > different warning message altogether this time > > > > > > Might be that the two oopses are different manifestations of the same > > > underlying problem, right? > > > > > > Thanx, Paul > > > > > Hi Paul, > > > > Your were right, those were the manifestation of the same > > problem. Adding to it another calltrace was commonly visible > > during the git-bisect. > > Did you try with a newer version? Should be fixed since last week. > > -- > Jens Axboe > Hi Jens, I tried with the next-20081216 kernel, but the kernel was stuck after loading the initrd image, passing unknown_nmi_panic=1, triggered following call trace, Initializing CPU#0 BUG: unable to handle kernel NULL pointer dereference at 0000000000000048 IP: [<ffffffff8072c547>] init_ISA_irqs+0x20/0x5d PGD 0 Thread overran stack, or stack corrupted Oops: 0002 [#1] SMP last sysfs file: CPU 0 Modules linked in: Pid: 0, comm: swapper Not tainted 2.6.28-rc8-next-20081216-autokern1 #1 RIP: 0010:[<ffffffff8072c547>] [<ffffffff8072c547>] init_ISA_irqs+0x20/0x5d RSP: 0018:ffffffff8071df38 EFLAGS: 00010093 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff80796e40 RDX: 0000000000000100 RSI: 0000000000000092 RDI: 0000000000000000 RBP: ffffffff8071df48 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8071df18 R11: 0000000000000070 R12: ffff88000103a040 R13: cccccccccccccccd R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffffffff8070e3c0(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: 0000000000000048 CR3: 0000000000201000 CR4: 00000000000006a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process swapper (pid: 0, threadinfo ffffffff8071c000, task ffffffff806a43a0) Stack: cccccccccccccccd ffffffff80754aa0 ffffffff8071df68 ffffffff8072c591 ffffffff8071df68 ffffffff8073ca50 ffffffff8071df98 ffffffff80725af2 0000000000000000 0000000000837a70 0000000000000000 0000000000000000 Call Trace: [<ffffffff8072c591>] native_init_IRQ+0xd/0x8a2 [<ffffffff8073ca50>] ? rcu_init+0x9/0xb [<ffffffff80725af2>] start_kernel+0x1a1/0x315 [<ffffffff807252a0>] x86_64_start_reservations+0xaf/0xb3 [<ffffffff807253a1>] x86_64_start_kernel+0xda/0xe1 Code: 20 5f 6a 80 e8 63 08 cb ff c9 c3 55 48 89 e5 53 31 db 48 83 ec 08 e8 05 88 00 00 31 ff e8 cd 2f ae ff 89 df e8 4d d5 b3 ff 89 df <c7> 40 48 00 02 00 00 48 c7 40 40 00 00 00 00 c7 40 4c 01 00 00 RIP [<ffffffff8072c547>] init_ISA_irqs+0x20/0x5d RSP <ffffffff8071df38> CR2: 0000000000000048 ---[ end trace 4eaa2a86a8e2da22 ]--- Kernel panic - not syncing: Attempted to kill the idle task! Pid: 0, comm: swapper Tainted: G D 2.6.28-rc8-next-20081216-autokern1 #1 Call Trace: [<ffffffff80237e80>] panic+0xa0/0x160 [<ffffffff803b6b40>] ? account+0xe2/0xf1 [<ffffffff8024e065>] ? blocking_notifier_call_chain+0xf/0x11 [<ffffffff8023ad07>] do_exit+0x7c/0x7a9 [<ffffffff803b6cf1>] ? get_random_bytes+0x1b/0x1d [<ffffffff80546456>] oops_end+0xb2/0xba [<ffffffff80547cfb>] do_page_fault+0x738/0x7e7 [<ffffffff80545a3f>] page_fault+0x1f/0x30 [<ffffffff8072c547>] ? init_ISA_irqs+0x20/0x5d [<ffffffff8072c545>] ? init_ISA_irqs+0x1e/0x5d [<ffffffff8072c591>] native_init_IRQ+0xd/0x8a2 [<ffffffff8073ca50>] ? rcu_init+0x9/0xb [<ffffffff80725af2>] start_kernel+0x1a1/0x315 [<ffffffff807252a0>] x86_64_start_reservations+0xaf/0xb3 [<ffffffff807253a1>] x86_64_start_kernel+0xda/0xe1 ------------[ cut here ]------------ WARNING: at kernel/smp.c:299 smp_call_function_many+0x3a/0x215() Hardware name: IBM eServer BladeCenter LS20 -[885055U]- Modules linked in: Pid: 0, comm: swapper Tainted: G D 2.6.28-rc8-next-20081216-autokern1 #1 Call Trace: [<ffffffff80237db2>] warn_slowpath+0xd3/0xf2 [<ffffffff80238ada>] ? printk+0x67/0x69 [<ffffffff807253a1>] ? x86_64_start_kernel+0xda/0xe1 [<ffffffff8021eb4b>] ? touch_nmi_watchdog+0x65/0x69 [<ffffffff8020f26e>] ? printk_address+0x2c/0x2e [<ffffffff807253a1>] ? x86_64_start_kernel+0xda/0xe1 [<ffffffff8020f453>] ? print_context_stack+0x97/0xaf [<ffffffff8020e6b9>] ? dump_trace+0x26f/0x27e [<ffffffff8025631c>] smp_call_function_many+0x3a/0x215 [<ffffffff80212130>] ? stop_this_cpu+0x0/0x20 [<ffffffff80256517>] smp_call_function+0x20/0x24 [<ffffffff8021d4fb>] native_smp_send_stop+0x22/0x30 [<ffffffff80237e94>] panic+0xb4/0x160 [<ffffffff803b6b40>] ? account+0xe2/0xf1 [<ffffffff8024e065>] ? blocking_notifier_call_chain+0xf/0x11 [<ffffffff8023ad07>] do_exit+0x7c/0x7a9 [<ffffffff803b6cf1>] ? get_random_bytes+0x1b/0x1d [<ffffffff80546456>] oops_end+0xb2/0xba [<ffffffff80547cfb>] do_page_fault+0x738/0x7e7 [<ffffffff80545a3f>] page_fault+0x1f/0x30 [<ffffffff8072c547>] ? init_ISA_irqs+0x20/0x5d [<ffffffff8072c545>] ? init_ISA_irqs+0x1e/0x5d [<ffffffff8072c591>] native_init_IRQ+0xd/0x8a2 [<ffffffff8073ca50>] ? rcu_init+0x9/0xb [<ffffffff80725af2>] start_kernel+0x1a1/0x315 [<ffffffff807252a0>] x86_64_start_reservations+0xaf/0xb3 [<ffffffff807253a1>] x86_64_start_kernel+0xda/0xe1 ---[ end trace 4eaa2a86a8e2da22 ]--- -- Thanks & Regards, Kamalesh Babulal, Linux Technology Center, IBM, ISTL. -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
