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Message-ID: <20090826021230.GW6616@linux.vnet.ibm.com> Date: Tue, 25 Aug 2009 19:12:30 -0700 From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> To: Eric Paris <eparis@...hat.com> Cc: Alexey Starikovskiy <astarikovskiy@...e.de>, linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org, len.brown@...el.com, vegard.nossum@...il.com Subject: Re: BUG: scheduling while atomic in acpi_ps_complete_op On Mon, Aug 24, 2009 at 10:36:49AM -0400, Eric Paris wrote: > On Sat, 2009-08-22 at 01:24 +0400, Alexey Starikovskiy wrote: > > Eric Paris пишет: > > > On Sat, 2009-08-22 at 00:12 +0400, Alexey Starikovskiy wrote: > > >> Hi, > > >> This should be handled by abe1dfab60e1839d115930286cb421f5a5b193f3. > > > > > > And yet I'm getting it from linux-next today. > > > > > > So you are apparently failing the in_atomic_preempt_off() test but > > > succeeding in your !irqs_disabled() test. > > > > > > Something isn't right since I'm hitting it hundreds of times on boot. > > > > > > -Eric > > > > > Ok, let's see if replacing irqs_disabled() to > > in_atomic_preempt_off() helps... > > It does stop my slew of warnings. Not sure it completely fixes my > problems though.... > > [ 1.897021] ... counter mask: 0000000700000003^M > [ 1.906821] ACPI: Core revision 20090625^M > [ 10.000008] INFO: RCU detected CPU 0 stall (t=10000 jiffies)^M > [ 10.000008] sending NMI to all CPUs:^M > [ 21.907580] Setting APIC routing to flat^M > [ 21.973314] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1^M > [ 21.985260] CPU0: Intel(R) Xeon(R) CPU X5355 @ 2.66GHz stepping 07^M > [ 21.992017] kmemcheck: Limiting number of CPUs to 1.^M > [ 21.993065] kmemcheck: Initialized^M > [ 22.750118] Brought up 1 CPUs^M > [ 22.751069] Total of 1 processors activated (5333.45 BogoMIPS).^M > [ 23.493639] khelper used greatest stack depth: 4848 bytes left^M > [ 24.999193] Booting paravirtualized kernel on bare hardware^M > [ 25.265364] Time: 17:50:52 Date: 08/21/09^M > [ 25.616191] NET: Registered protocol family 16^M > [ 27.765113] ACPI: bus type pci registered^M > [ 28.795307] PCI: Using configuration type 1 for base access^M > [ 61.793279] bio: create slab <bio-0> at 0^M > [ 95.285367] ACPI: BIOS _OSI(Linux) query ignored^M > [ 102.628227] ACPI: Interpreter enabled^M > [ 102.630134] ACPI: (supports S0 S1 S5)^M > [ 102.823225] ACPI: Using IOAPIC for interrupt routing^M > [ 142.365090] ACPI: No dock devices found.^M > [ 156.864036] ACPI: PCI Root Bridge [PCI0] (0000:00)^M > [ 157.460654] pci 0000:00:07.3: quirk: region 1000-103f claimed by PIIX4 ACPI^M > [ 157.463937] pci 0000:00:07.3: quirk: region 1040-104f claimed by PIIX4 SMB^M > [ 157.644036] pci 0000:00:11.0: transparent bridge^M > [ 193.009036] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 9 10 11 14 15) *0, disabled.^M > [ 193.938036] ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 *9 10 11 14 15)^M > [ 194.864036] ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 10 *11 14 15)^M > [ 195.780036] ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 9 10 11 14 15) *0, disabled.^M > > Something took 20 seconds between "ACPI: Core revision 20090625" and > "Setting APIC routing to flat" > > This is a linux-next kernel, on vmware-server, with kmemcheck enabled. > Disabling kmemcheck seems to make all of this go away. If not the ACPI > guys who should I be talking to? > > A little bit later I finally see backtraces from NMIs because of RCU > stalls. Anyone have ideas here? This usually means that something is spinning indefinitely in the kernel. Do you really only have one CPU? If not, the other CPUs appear to be locked up hard enough to ignore an NMI, which is rather impressive. If you really do only have one CPU, I suggest looking up the stack from the <EOI>, and see if there is a possibility for it to loop for many seconds. Thanx, Paul > [ 213.168161] INFO: RCU detected CPU 0 stall (t=10004 jiffies)^M > [ 213.168161] sending NMI to all CPUs:^M > [ 213.168161] NMI backtrace for cpu 0^M > [ 213.168161] CPU 0:^M > [ 213.168161] Modules linked in:^M > [ 213.168161] Pid: 1, comm: swapper Not tainted 2.6.31-rc6-next-20090821 #46 VMware Virtual Platform^M > [ 213.168161] RIP: 0010:[<ffffffff81036ff1>] [<ffffffff81036ff1>] flat_send_IPI_mask+0x81/0xe0^M > [ 213.168161] RSP: 0018:ffff880006403d48 EFLAGS: 00000046^M > [ 213.168161] RAX: 0000000000000c00 RBX: 0000000000000c00 RCX: 0000000000000001^M > [ 213.168161] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000300^M > [ 213.168161] RBP: ffff880006403d78 R08: 0000000000000002 R09: 0000000000010002^M > [ 213.168161] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000002^M > [ 213.168161] R13: 0000000000000046 R14: 0000000000000001 R15: ffffffff8173e140^M > [ 213.168161] FS: 0000000000000000(0000) GS:ffff880006400000(0000) knlGS:0000000000000000^M > [ 213.168161] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b^M > [ 213.168161] CR2: ffff88007f80605c CR3: 0000000001001000 CR4: 00000000000006f0^M > [ 213.168161] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000^M > [ 213.168161] DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400^M > [ 213.168161] Call Trace:^M > [ 213.168161] <#DB[1]> <<EOE>> Pid: 1, comm: swapper Not tainted 2.6.31-rc6-next-20090821 #46^M > [ 213.168161] Call Trace:^M > [ 213.168161] <NMI> [<ffffffff815353f1>] nmi_watchdog_tick+0x1a1/0x2f0^M > [ 213.168161] [<ffffffff81097f4d>] ? notify_die+0x3d/0x60^M > [ 213.168161] [<ffffffff81534338>] do_nmi+0xb8/0x2f0^M > [ 213.168161] [<ffffffff81533f40>] nmi+0x20/0x39^M > [ 213.168161] [<ffffffff81036ff1>] ? flat_send_IPI_mask+0x81/0xe0^M > [ 213.168161] <<EOE>> <IRQ> [<ffffffff810370ce>] flat_send_IPI_all+0x7e/0x90^M > [ 213.168161] [<ffffffff8103268c>] arch_trigger_all_cpu_backtrace+0x5c/0xb0^M > [ 213.168161] [<ffffffff810de45d>] __rcu_pending+0x8d/0x320^M > [ 213.168161] [<ffffffff810de726>] rcu_pending+0x36/0x80^M > [ 213.168161] [<ffffffff8107f62b>] ? run_local_timers+0x2b/0x50^M > [ 213.168161] [<ffffffff8107fa9d>] update_process_times+0x4d/0x90^M > [ 213.168161] [<ffffffff810a3393>] ? tick_do_update_jiffies64+0x83/0xf0^M > [ 213.168161] [<ffffffff810a36cb>] tick_sched_timer+0x6b/0xe0^M > [ 213.168161] [<ffffffff815337d5>] ? _spin_unlock+0x75/0x80^M > [ 213.168161] [<ffffffff810a3660>] ? tick_sched_timer+0x0/0xe0^M > [ 213.168161] [<ffffffff810957b6>] __run_hrtimer+0x76/0x100^M > [ 213.168161] [<ffffffff810958f1>] ? hrtimer_interrupt+0xb1/0x1b0^M > [ 213.168161] [<ffffffff8109592b>] hrtimer_interrupt+0xeb/0x1b0^M > [ 213.168161] [<ffffffff81031538>] smp_apic_timer_interrupt+0x78/0xd0^M > [ 213.168161] [<ffffffff81014e63>] apic_timer_interrupt+0x13/0x20^M > [ 213.168161] <EOI> [<ffffffff81533270>] ? _write_unlock_irqrestore+0x90/0xb0^M > [ 213.168161] [<ffffffff81153eae>] ? create_object+0x1fe/0x2e0^M > [ 213.168161] [<ffffffff8104c684>] ? mark_shadow+0x74/0xf0^M > [ 213.168161] [<ffffffff8151843e>] ? kmemleak_alloc+0x6e/0xf0^M > [ 213.168161] [<ffffffff8114cc44>] ? __kmalloc_track_caller+0x164/0x2e0^M > [ 213.168161] [<ffffffff810f66e2>] ? trace_define_field+0x92/0x180^M > [ 213.168161] [<ffffffff8111ec26>] ? kstrdup+0x46/0x90^M > [ 213.168161] [<ffffffff810f66e2>] ? trace_define_field+0x92/0x180^M > [ 213.168161] [<ffffffff81057744>] ? ftrace_define_fields_sched_wait_task+0x1a4/0x1b0^M > [ 213.168161] [<ffffffff810f7342>] ? event_create_dir+0x1e2/0x440^M > [ 213.168161] [<ffffffff8182c15d>] ? event_trace_init+0x15d/0x260^M > [ 213.168161] [<ffffffff8182c000>] ? event_trace_init+0x0/0x260^M > [ 213.168161] [<ffffffff8100a07b>] ? do_one_initcall+0x4b/0x1b0^M > [ 213.168161] [<ffffffff810d84c0>] ? irq_to_desc+0x40/0x50^M > [ 213.168161] [<ffffffff81804140>] ? early_idt_handler+0x0/0x71^M > [ 213.168161] [<ffffffff81805280>] ? kernel_init+0x210/0x2e0^M > [ 213.168161] [<ffffffff8101539a>] ? child_rip+0xa/0x20^M > [ 213.168161] [<ffffffff81014cd4>] ? restore_args+0x0/0x30^M > [ 213.168161] [<ffffffff81805070>] ? kernel_init+0x0/0x2e0^M > [ 213.168161] [<ffffffff81015390>] ? child_rip+0x0/0x20^M > > [ 243.172246] INFO: RCU detected CPU 0 stall (t=40007 jiffies)^M > [ 243.172246] sending NMI to all CPUs:^M > [ 243.172246] NMI backtrace for cpu 0^M > [ 243.172246] CPU 0:^M > [ 243.172246] Modules linked in:^M > [ 243.172246] Pid: 1, comm: swapper Not tainted 2.6.31-rc6-next-20090821 #46 VMware Virtual Platform^M > [ 243.172246] RIP: 0010:[<ffffffff81036ff1>] [<ffffffff81036ff1>] flat_send_IPI_mask+0x81/0xe0^M > [ 243.172246] RSP: 0018:ffff880006403d48 EFLAGS: 00000046^M > [ 243.172246] RAX: 0000000000000c00 RBX: 0000000000000c00 RCX: 0000000000000001^M > [ 243.172246] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000300^M > [ 243.172246] RBP: ffff880006403d78 R08: 0000000000000002 R09: 0000000000010002^M > [ 243.172246] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000002^M > [ 243.172246] R13: 0000000000000046 R14: 0000000000000001 R15: ffffffff8173e140^M > [ 243.172246] FS: 0000000000000000(0000) GS:ffff880006400000(0000) knlGS:0000000000000000^M > [ 243.172246] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b^M > [ 243.172246] CR2: ffff88007f80605c CR3: 0000000001001000 CR4: 00000000000006f0^M > [ 243.172246] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000^M > [ 243.172246] DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400^M > [ 243.172246] Call Trace:^M > [ 243.172246] <#DB[1]> <<EOE>> Pid: 1, comm: swapper Not tainted 2.6.31-rc6-next-20090821 #46^M > [ 243.172246] Call Trace:^M > [ 243.172246] <NMI> [<ffffffff815353f1>] nmi_watchdog_tick+0x1a1/0x2f0^M > [ 243.172246] [<ffffffff81097f4d>] ? notify_die+0x3d/0x60^M > [ 243.172246] [<ffffffff81534338>] do_nmi+0xb8/0x2f0^M > [ 243.172246] [<ffffffff81533f40>] nmi+0x20/0x39^M > [ 243.172246] [<ffffffff81036ff1>] ? flat_send_IPI_mask+0x81/0xe0^M > [ 243.172246] <<EOE>> <IRQ> [<ffffffff810370ce>] flat_send_IPI_all+0x7e/0x90^M > [ 243.172246] [<ffffffff8103268c>] arch_trigger_all_cpu_backtrace+0x5c/0xb0^M > [ 243.172246] [<ffffffff810de45d>] __rcu_pending+0x8d/0x320^M > [ 243.172246] [<ffffffff810de726>] rcu_pending+0x36/0x80^M > [ 243.172246] [<ffffffff8107f62b>] ? run_local_timers+0x2b/0x50^M > [ 243.172246] [<ffffffff8107fa9d>] update_process_times+0x4d/0x90^M > [ 243.172246] [<ffffffff810a3393>] ? tick_do_update_jiffies64+0x83/0xf0^M > [ 243.172246] [<ffffffff810a36cb>] tick_sched_timer+0x6b/0xe0^M > [ 243.172246] [<ffffffff815337d5>] ? _spin_unlock+0x75/0x80^M > [ 243.172246] [<ffffffff810a3660>] ? tick_sched_timer+0x0/0xe0^M > [ 243.172246] [<ffffffff810957b6>] __run_hrtimer+0x76/0x100^M > [ 243.172246] [<ffffffff810958f1>] ? hrtimer_interrupt+0xb1/0x1b0^M > [ 243.172246] [<ffffffff8109592b>] hrtimer_interrupt+0xeb/0x1b0^M > [ 243.172246] [<ffffffff81031538>] smp_apic_timer_interrupt+0x78/0xd0^M > [ 243.172246] [<ffffffff81014e63>] apic_timer_interrupt+0x13/0x20^M > [ 243.172246] <EOI> [<ffffffff81533270>] ? _write_unlock_irqrestore+0x90/0xb0^M > [ 243.172246] [<ffffffff81153eae>] ? create_object+0x1fe/0x2e0^M > [ 243.172246] [<ffffffff8151843e>] ? kmemleak_alloc+0x6e/0xf0^M > [ 243.172246] [<ffffffff8114c5a3>] ? kmem_cache_alloc+0x153/0x200^M > [ 243.172246] [<ffffffff810fd08f>] ? init_preds+0xdf/0x280^M > [ 243.172246] [<ffffffff810f25de>] ? register_ftrace_event+0x7e/0x230^M > [ 243.172246] [<ffffffff8126b5e4>] ? ftrace_raw_init_event_block_remap+0x54/0x70^M > [ 243.172246] [<ffffffff8182c182>] ? event_trace_init+0x182/0x260^M > [ 243.172246] [<ffffffff8182c000>] ? event_trace_init+0x0/0x260^M > [ 243.172246] [<ffffffff8100a07b>] ? do_one_initcall+0x4b/0x1b0^M > [ 243.172246] [<ffffffff810d84c0>] ? irq_to_desc+0x40/0x50^M > [ 243.172246] [<ffffffff81804140>] ? early_idt_handler+0x0/0x71^M > [ 243.172246] [<ffffffff81805280>] ? kernel_init+0x210/0x2e0^M > [ 243.172246] [<ffffffff8101539a>] ? child_rip+0xa/0x20^M > [ 243.172246] [<ffffffff81014cd4>] ? restore_args+0x0/0x30^M > [ 243.172246] [<ffffffff81805070>] ? kernel_init+0x0/0x2e0^M > [ 243.172246] [<ffffffff81015390>] ? child_rip+0x0/0x20^M > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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