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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
..
alpha [PATCH] fix osf_getdirents() 2008-08-25 01:18:06 -04:00
arm Merge master.kernel.org:/home/rmk/linux-2.6-arm 2008-09-08 15:50:19 -07:00
avr32 avr32: pm_standby low-power ram bug fix 2008-09-01 13:04:09 +02:00
blackfin Blackfin arch: Fix PM building on BF52x: No ROTWE on BF52x, add USBWE 2008-08-28 17:32:01 +08:00
cris removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
frv FRV: Wire up new system calls 2008-08-01 13:03:49 -07:00
h8300 [h8300] move include/asm-h8300 to arch/h8300/include/asm 2008-08-13 14:26:32 -07:00
ia64 lib: Correct printk %pF to work on all architectures 2008-09-09 11:51:15 -07:00
m32r m32r: use generic show_mem() 2008-07-26 12:00:11 -07:00
m68k m68k: atari_keyb_init operator precedence fix 2008-09-02 10:57:52 -07:00
m68knommu m68k{,nommu}: Wire up new system calls 2008-08-11 10:37:34 -07:00
mips [MIPS] IP22: Fix detection of second HPC3 on Challenge S 2008-09-08 18:45:39 +02:00
mn10300 removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
parisc lib: Correct printk %pF to work on all architectures 2008-09-09 11:51:15 -07:00
powerpc lib: Correct printk %pF to work on all architectures 2008-09-09 11:51:15 -07:00
s390 [S390] CVE-2008-1514: prevent ptrace padding area read/write in 31-bit mode 2008-09-09 12:39:06 +02:00
sh sh64: resume_kernel fix for kernel oops built with CONFIG_BKL_PREEMPT=y. 2008-09-05 14:51:28 +09:00
sparc sparc: Fix resource flags for PCI children in OF device tree. 2008-08-28 22:59:10 -07:00
sparc64 sparc64: Disable timer interrupts in fixup_irqs(). 2008-09-08 17:21:07 -07:00
um uml: fix tty-related build error 2008-07-30 09:41:45 -07:00
x86 x86, oprofile: BUG scheduling while atomic 2008-09-22 11:54:24 +02:00
xtensa remove unneeded #include <linux/ide.h>'s 2008-08-05 18:17:00 +02:00
.gitignore
Kconfig tracehook: CONFIG_HAVE_ARCH_TRACEHOOK 2008-07-26 12:00:09 -07:00