linux-kernel - BUG: scheduling while atomic, under native_smp_prepare

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Date:	Fri, 17 Aug 2012 21:49:44 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Yinghai Lu <yinghai@...nel.org>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: BUG: scheduling while atomic, under native_smp_prepare_cpus()

Trace one (full config/dmesg attached):

[    0.042794] init IO_APIC IRQs
[    0.043305]  apic 2 pin 0 not connected
[    0.043953] BUG: scheduling while atomic: swapper/0/1/0x10000002
[    0.044017] no locks held by swapper/0/1.
[    0.044692] Pid: 1, comm: swapper/0 Not tainted 3.6.0-rc1-00420-gb7aebb9 #34
[    0.045861] Call Trace:
[    0.048071]  [<c106361e>] __schedule_bug+0x5e/0x70
[    0.048890]  [<c1b28701>] __schedule+0x91/0xb10
[    0.049660]  [<c14472ea>] ? vsnprintf+0x33a/0x450
[    0.050444]  [<c1060006>] ? lg_local_lock+0x6/0x70
[    0.051256]  [<c14fb5b1>] ? wait_for_xmitr+0x31/0x90
[    0.052019]  [<c144fd55>] ? do_raw_spin_unlock+0xa5/0xf0
[    0.052903]  [<c1b2a532>] ? _raw_spin_unlock+0x22/0x30
[    0.053759]  [<c105cdbb>] ? up+0x1b/0x70
[    0.054421]  [<c1065d6b>] __cond_resched+0x1b/0x30
[    0.055228]  [<c1b292d5>] _cond_resched+0x45/0x50
[    0.056020]  [<c1b26c58>] mutex_lock_nested+0x28/0x370
[    0.056884]  [<c1034222>] ? console_unlock+0x3a2/0x4e0
[    0.057741]  [<c1ac8559>] __irq_alloc_descs+0x39/0x1c0
[    0.058589]  [<c10223bc>] io_apic_setup_irq_pin+0x2c/0x310
[    0.060042]  [<c20638df>] setup_IO_APIC+0x101/0x744
[    0.060878]  [<c1021d51>] ? clear_IO_APIC+0x31/0x50
[    0.061695]  [<c20600f4>] native_smp_prepare_cpus+0x538/0x680
[    0.062644]  [<c2056a91>] ? do_one_initcall+0x12c/0x12c
[    0.063517]  [<c2056a91>] ? do_one_initcall+0x12c/0x12c
[    0.064016]  [<c2056adc>] kernel_init+0x4b/0x17f
[    0.064790]  [<c2056a91>] ? do_one_initcall+0x12c/0x12c
[    0.065660]  [<c1b2bbd6>] kernel_thread_helper+0x6/0x10
[    0.066592] IOAPIC[0]: Set routing entry (2-1 -> 0x41 -> IRQ 1 Mode:0 Active:0 Dest:1)
[    0.068045] IOAPIC[0]: Set routing entry (2-2 -> 0x51 -> IRQ 0 Mode:0 Active:0 Dest:1)

Trace two (triggered by another config):

[    0.288018] tlb_flushall_shift is 0xffffffff
[    0.316019] Freeing SMP alternatives: 20k freed
[    0.364022] BUG: scheduling while atomic: swapper/0/1/0x10000002
[    0.364022] no locks held by swapper/0/1.
[    0.368023] Pid: 1, comm: swapper/0 Not tainted 3.6.0-rc1 #1
[    0.368023] Call Trace:
[    0.368023]  [<79812e23>] __schedule_bug+0x41/0x53
[    0.372023]  [<79820393>] __schedule+0x62/0x488
[    0.376023]  [<792d17ae>] ? radix_tree_lookup+0xa/0xc
[    0.376023]  [<79071f4e>] ? rcu_irq_exit+0x61/0x66
[    0.376023]  [<79026be7>] ? irq_exit+0x60/0x6c
[    0.376023]  [<790035df>] ? do_IRQ+0x6c/0x80
[    0.380023]  [<7903d794>] __cond_resched+0x16/0x26
[    0.380023]  [<79820888>] _cond_resched+0x13/0x1c
[    0.380023]  [<7909f30a>] slab_pre_alloc_hook.isra.44+0x2e/0x33
[    0.380023]  [<790a09c6>] kmem_cache_alloc+0x1b/0xbb
[    0.384024]  [<792ce416>] ? alloc_cpumask_var_node+0x1a/0x72
[    0.384024]  [<792ce416>] alloc_cpumask_var_node+0x1a/0x72
[    0.384024]  [<792ce486>] alloc_cpumask_var+0xb/0xd
[    0.388024]  [<792ce493>] zalloc_cpumask_var+0xb/0xd
[    0.388024]  [<79bfe1fd>] native_smp_prepare_cpus+0x93/0x380
[    0.388024]  [<79bf6a7e>] ? do_one_initcall+0x10c/0x10c
[    0.388024]  [<79bf6ac6>] kernel_init+0x48/0x16e
[    0.392024]  [<79bf6a7e>] ? do_one_initcall+0x10c/0x10c
[    0.392024]  [<7982241e>] kernel_thread_helper+0x6/0xd
[    0.400025] smpboot: SMP disabled
[    0.400025] Performance Events:

Thanks,
Fengguang

View attachment "dmesg-kvm-bens-3065-2012-08-17-20-40-44-3.6.0-rc1-00420-gb7aebb9-34" of type "text/plain" (74372 bytes)

View attachment "config-3.6.0-rc1-00420-gb7aebb9" of type "text/plain" (74240 bytes)