Andrea Righi b61e06f258 x86, oprofile: BUG scheduling while atomic ... nmi_shutdown() calls unregister_die_notifier() from an atomic context after setting preempt_disable() via get_cpu_var(): [ 1049.404154] BUG: scheduling while atomic: oprofiled/7796/0x00000002 [ 1049.404171] INFO: lockdep is turned off. [ 1049.404176] Modules linked in: oprofile af_packet rfcomm l2cap kvm_intel kvm i915 drm acpi_cpufreq cpufreq_userspace cpufreq_conservative cpufreq_ondemand cpufreq_powersave freq_table container sbs sbshc dm_mod arc4 ecb cryptomgr aead snd_hda_intel crypto_blkcipher snd_pcm_oss crypto_algapi snd_pcm iwlagn iwlcore snd_timer iTCO_wdt led_class btusb iTCO_vendor_support snd psmouse bluetooth mac80211 soundcore cfg80211 snd_page_alloc intel_agp video output button battery ac dcdbas evdev ext3 jbd mbcache sg sd_mod piix ata_piix libata scsi_mod dock tg3 libphy ehci_hcd uhci_hcd usbcore thermal processor fan fuse [ 1049.404362] Pid: 7796, comm: oprofiled Not tainted 2.6.27-rc5-mm1 #30 [ 1049.404368] Call Trace: [ 1049.404384] [<ffffffff804769fd>] thread_return+0x4a0/0x7d3 [ 1049.404396] [<ffffffff8026ad92>] generic_exec_single+0x52/0xe0 [ 1049.404405] [<ffffffff8026ae1a>] generic_exec_single+0xda/0xe0 [ 1049.404414] [<ffffffff8026aee3>] smp_call_function_single+0x73/0x150 [ 1049.404423] [<ffffffff804770c5>] schedule_timeout+0x95/0xd0 [ 1049.404430] [<ffffffff80476083>] wait_for_common+0x43/0x180 [ 1049.404438] [<ffffffff80476154>] wait_for_common+0x114/0x180 [ 1049.404448] [<ffffffff80236980>] default_wake_function+0x0/0x10 [ 1049.404457] [<ffffffff8024f810>] synchronize_rcu+0x30/0x40 [ 1049.404463] [<ffffffff8024f890>] wakeme_after_rcu+0x0/0x10 [ 1049.404472] [<ffffffff80479ca0>] _spin_unlock_irqrestore+0x40/0x80 [ 1049.404482] [<ffffffff80256def>] atomic_notifier_chain_unregister+0x3f/0x60 [ 1049.404501] [<ffffffffa03d8801>] nmi_shutdown+0x51/0x90 [oprofile] [ 1049.404517] [<ffffffffa03d6134>] oprofile_shutdown+0x34/0x70 [oprofile] [ 1049.404532] [<ffffffffa03d721e>] event_buffer_release+0xe/0x40 [oprofile] [ 1049.404543] [<ffffffff802bdcdd>] __fput+0xcd/0x240 [ 1049.404551] [<ffffffff802baa74>] filp_close+0x54/0x90 [ 1049.404560] [<ffffffff8023e1d1>] put_files_struct+0xb1/0xd0 [ 1049.404568] [<ffffffff8023f82f>] do_exit+0x18f/0x930 [ 1049.404576] [<ffffffff8020be03>] restore_args+0x0/0x30 [ 1049.404584] [<ffffffff80240006>] do_group_exit+0x36/0xa0 [ 1049.404592] [<ffffffff8020b7cb>] system_call_fastpath+0x16/0x1b This can be easily triggered with 'opcontrol --shutdown'. Simply move get_cpu_var() above unregister_die_notifier(). Signed-off-by: Andrea Righi <righi.andrea@gmail.com> Acked-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2008-09-22 11:54:24 +02:00
..
boot	x86: boot: stub out unimplemented CPU feature words	2008-09-05 16:13:44 -07:00
configs	x86: update defconfigs	2008-08-27 08:14:17 +02:00
crypto	[CRYPTO] aes-x86-32: Remove unused return code	2008-04-21 10:19:21 +08:00
ia32	tracehook: exec	2008-07-26 12:00:08 -07:00
kernel	AMD IOMMU: protect completion wait loop with iommu lock	2008-09-18 09:25:44 +02:00
kvm	KVM: MMU: Fix torn shadow pte	2008-08-25 17:24:27 +03:00
lguest	lguest: set max_pfn_mapped, growl loudly at Yinghai Lu	2008-07-29 09:58:31 +10:00
lib	x86: msr: propagate errors from smp_call_function_single()	2008-08-25 17:45:48 -07:00
mach-default	x86: add ->pre_time_init to x86_quirks	2008-07-20 09:25:52 +02:00
mach-es7000	x86: move the last Dprintk instance to pr_debug()	2008-07-21 21:58:34 +02:00
mach-generic	x86: make generic arch support NUMAQ, fix	2008-07-08 10:35:45 +02:00
mach-rdc321x	removed unused #include <linux/version.h>'s	2008-08-23 12:14:12 -07:00
mach-voyager	Merge branch 'generic-ipi' into generic-ipi-for-linus	2008-07-15 21:55:59 +02:00
math-emu	x86: coding style fixes to arch/x86/math-emu/reg_constant	2008-06-18 15:00:13 +02:00
mm	x86/paravirt: Remove duplicate paravirt_pagetable_setup_{start, done}()	2008-09-14 18:10:01 +02:00
oprofile	x86, oprofile: BUG scheduling while atomic	2008-09-22 11:54:24 +02:00
pci	Un-break printk strings in x86 PCI probing code	2008-09-02 10:38:28 -07:00
power	x86: fix i486 suspend to disk CR4 oops	2008-08-18 08:50:19 +02:00
vdso	Merge branches 'x86/urgent', 'x86/amd-iommu', 'x86/apic', 'x86/cleanups', 'x86/core', 'x86/cpu', 'x86/fixmap', 'x86/gart', 'x86/kprobes', 'x86/memtest', 'x86/modules', 'x86/nmi', 'x86/pat', 'x86/reboot', 'x86/setup', 'x86/step', 'x86/unify-pci', 'x86/uv', 'x86/xen' and 'xen-64bit' into x86/for-linus	2008-07-21 16:37:17 +02:00
video	x86: video/fbdev.c: add MODULE_LICENSE	2008-05-04 20:04:46 +02:00
xen	xen: fix for xen guest with mem > 3.7G	2008-09-14 16:46:34 +02:00
Kconfig	[x86] Clean up MAXSMP Kconfig, and limit NR_CPUS to 512	2008-08-25 14:15:38 -07:00
Kconfig.cpu	x86: disable static NOPLs on 32 bits	2008-09-08 11:35:43 -07:00
Kconfig.debug	x86: Fix help message for STRICT_DEVMEM config option	2008-07-21 13:04:08 -07:00
Makefile	x86, RDC321x: add to mach-default	2008-07-26 13:51:46 +02:00
Makefile_32.cpu	x86: move i386 and x86_64 Makefiles to arch/x86	2007-10-25 22:27:34 +02:00