Feng,
> I think it's pci_get_subsys() triggered this assert:
>
> /*
> * Oi! Can't be having __GFP_FS allocations with IRQs disabled.
> */
> if (DEBUG_LOCKS_WARN_ON(irqs_disabled_flags(flags)))
> return;
It's bisected down to this commit:
commit 55c844a4dd16a4d1fdc0cf2a283ec631a02ec448
Author: Feng Tang <feng.tang@xxxxxxxxx>
AuthorDate: Wed May 30 23:15:41 2012 +0800
Commit: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed Jun 6 12:03:23 2012 +0200
x86/reboot: Fix a warning message triggered by stop_other_cpus()
Thanks,
Fengguang
> [ 91.282131] machine restart
> [ 91.283895] ------------[ cut here ]------------
> [ 91.284731] WARNING: at /c/wfg/linux/kernel/lockdep.c:2739 lockdep_trace_alloc+0x1fb/0x210()
> [ 91.286132] Modules linked in:
> [ 91.286703] Pid: 697, comm: reboot Not tainted 3.5.0-00024-g01ff5db-dirty #4
> [ 91.287859] Call Trace:
> [ 91.288289] [<81050148>] warn_slowpath_common+0xb8/0x100
> [ 91.289338] [<8110acdb>] ? lockdep_trace_alloc+0x1fb/0x210
> [ 91.290264] [<8110acdb>] ? lockdep_trace_alloc+0x1fb/0x210
> [ 91.291161] [<810501ce>] warn_slowpath_null+0x3e/0x50
> [ 91.292042] [<8110acdb>] lockdep_trace_alloc+0x1fb/0x210
> [ 91.292934] [<81228e25>] kmem_cache_alloc_trace+0x55/0x600
> [ 91.292934] [<813025ca>] ? kobject_put+0x9a/0x160
> [ 91.292934] [<814e95e0>] ? klist_iter_exit+0x30/0x50
> [ 91.292934] [<81405881>] ? bus_find_device+0xf1/0x120
> [ 91.292934] [<81361a3c>] ? pci_get_subsys+0x11c/0x1b0
> [ 91.292934] [<81361a3c>] pci_get_subsys+0x11c/0x1b0
> [ 91.292934] [<81361afe>] pci_get_device+0x2e/0x40
> [ 91.292934] [<81033e25>] mach_reboot_fixups+0xa5/0xd0
> [ 91.292934] [<81027611>] native_machine_emergency_restart+0x1f1/0x590
> [ 91.292934] [<814f2e00>] ? printk+0x4b/0x5b
> [ 91.292934] [<810269ef>] native_machine_restart+0x6f/0x80
> [ 91.292934] [<810271cc>] machine_restart+0x1c/0x30
> [ 91.292934] [<810886e0>] kernel_restart+0x70/0xc0
> [ 91.292934] [<81088a85>] sys_reboot+0x325/0x380
> [ 91.292934] [<811f796c>] ? handle_pte_fault+0xdc/0x1740
> [ 91.292934] [<811f93e7>] ? handle_mm_fault+0x417/0x4a0
> [ 91.292934] [<8103e07b>] ? do_page_fault+0x7fb/0xb30
> [ 91.292934] [<810b33e7>] ? up_read+0x37/0x70
> [ 91.292934] [<8103e07b>] ? do_page_fault+0x7fb/0xb30
> [ 91.292934] [<8123c063>] ? do_sys_open+0x3a3/0x3f0
> [ 91.292934] [<8123c063>] ? do_sys_open+0x3a3/0x3f0
> [ 91.292934] [<810b0270>] ? update_rmtp+0xe0/0xe0
> [ 91.292934] [<8150376e>] ? restore_all+0xf/0xf
> [ 91.292934] [<8103d880>] ? vmalloc_sync_all+0x320/0x320
> [ 91.292934] [<81109fca>] ? trace_hardirqs_on_caller+0x28a/0x380
> [ 91.292934] [<81311594>] ? trace_hardirqs_on_thunk+0xc/0x10
> [ 91.292934] [<81503735>] syscall_call+0x7/0xb
>
> Thanks,
> Fengguang
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