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linux-stable/arch/x86/kernel/cpu
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Frederic Weisbecker 98ad1cc14a x86: Call idle notifier after irq_enter() 
Interrupts notify the idle exit state before calling irq_enter().
But the notifier code calls rcu_read_lock() and this is not
allowed while rcu is in an extended quiescent state. We need
to wait for irq_enter() -> rcu_idle_exit() to be called before
doing so otherwise this results in a grumpy RCU:

[    0.099991] WARNING: at include/linux/rcupdate.h:194 __atomic_notifier_call_chain+0xd2/0x110()
[    0.099991] Hardware name: AMD690VM-FMH
[    0.099991] Modules linked in:
[    0.099991] Pid: 0, comm: swapper Not tainted 3.0.0-rc6+ #255
[    0.099991] Call Trace:
[    0.099991]  <IRQ>  [<ffffffff81051c8a>] warn_slowpath_common+0x7a/0xb0
[    0.099991]  [<ffffffff81051cd5>] warn_slowpath_null+0x15/0x20
[    0.099991]  [<ffffffff817d6fa2>] __atomic_notifier_call_chain+0xd2/0x110
[    0.099991]  [<ffffffff817d6ff1>] atomic_notifier_call_chain+0x11/0x20
[    0.099991]  [<ffffffff81001873>] exit_idle+0x43/0x50
[    0.099991]  [<ffffffff81020439>] smp_apic_timer_interrupt+0x39/0xa0
[    0.099991]  [<ffffffff817da253>] apic_timer_interrupt+0x13/0x20
[    0.099991]  <EOI>  [<ffffffff8100ae67>] ? default_idle+0xa7/0x350
[    0.099991]  [<ffffffff8100ae65>] ? default_idle+0xa5/0x350
[    0.099991]  [<ffffffff8100b19b>] amd_e400_idle+0x8b/0x110
[    0.099991]  [<ffffffff810cb01f>] ? rcu_enter_nohz+0x8f/0x160
[    0.099991]  [<ffffffff810019a0>] cpu_idle+0xb0/0x110
[    0.099991]  [<ffffffff817a7505>] rest_init+0xe5/0x140
[    0.099991]  [<ffffffff817a7468>] ? rest_init+0x48/0x140
[    0.099991]  [<ffffffff81cc5ca3>] start_kernel+0x3d1/0x3dc
[    0.099991]  [<ffffffff81cc5321>] x86_64_start_reservations+0x131/0x135
[    0.099991]  [<ffffffff81cc5412>] x86_64_start_kernel+0xed/0xf4

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Andy Henroid <andrew.d.henroid@intel.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
2011-12-11 10:31:38 -08:00
..
mcheck x86: Call idle notifier after irq_enter() 2011-12-11 10:31:38 -08:00
mtrr x86/mtrr: Resolve inconsistency with Intel processor manual 2011-12-05 15:06:15 +01:00
.gitignore
amd.c x86: Fix boot failures on older AMD CPU's 2011-12-04 11:57:09 -08:00
bugs.c x86-32, fpu: Fix DNA exception during check_fpu() 2011-06-30 17:29:47 -07:00
bugs_64.c x86/cpu: Clean up various files a bit 2009-07-11 11:24:09 +02:00
centaur.c x86, cpu: mv display_cacheinfo -> cpu_detect_cache_sizes 2009-11-23 11:59:53 -08:00
common.c Merge branch 'x86-rdrand-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2011-10-28 05:29:07 -07:00
cpu.h x86: Add a BSP cpu_dev helper 2011-08-05 12:26:49 -07:00
cyrix.c x86, cpu: mv display_cacheinfo -> cpu_detect_cache_sizes 2009-11-23 11:59:53 -08:00
hypervisor.c x86, hyper: Change hypervisor detection order 2011-07-08 16:22:29 -07:00
intel.c x86, intel: Use c->microcode for Atom errata check 2011-10-14 13:16:38 +02:00
intel_cacheinfo.c x86: cache_info: Update calculation of AMD L3 cache indices 2011-09-12 19:29:03 +02:00
Makefile Merge branch 'x86-rdrand-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2011-10-28 05:29:07 -07:00
mkcapflags.pl
mshyperv.c x86: Hyper-V: Integrate the clocksource with Hyper-V detection code 2011-09-08 10:33:59 +02:00
perf_event.c perf/x86: Enable raw event access to Intel offcore events 2011-11-14 13:03:44 +01:00
perf_event.h perf, intel: Use GO/HO bits in perf-ctr 2011-10-10 06:56:42 +02:00
perf_event_amd.c perf, x86: Share IBS macros between perf and oprofile 2011-10-10 06:57:11 +02:00
perf_event_amd_ibs.c perf, x86: Force IBS LVT offset assignment for family 10h 2011-12-05 09:32:59 +01:00
perf_event_intel.c perf, x86: Disable PEBS on SandyBridge chips 2011-12-05 09:32:38 +01:00
perf_event_intel_ds.c perf/x86: Fix PEBS instruction unwind 2011-11-14 13:01:20 +01:00
perf_event_intel_lbr.c x86, perf: Clean up perf_event cpu code 2011-09-26 12:58:00 +02:00
perf_event_p4.c perf: Don't use -ENOSPC for out of PMU resources 2011-11-14 13:01:24 +01:00
perf_event_p6.c x86, perf: Clean up perf_event cpu code 2011-09-26 12:58:00 +02:00
perfctr-watchdog.c perf, x86: Add new AMD family 15h msrs to perfctr reservation code 2011-02-16 13:30:50 +01:00
powerflags.c
proc.c x86, microcode: Correct microcode revision format 2011-10-19 15:47:48 +02:00
rdrand.c x86, random: Verify RDRAND functionality and allow it to be disabled 2011-07-31 14:02:19 -07:00
scattered.c Merge branch 'x86-amd-nb-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-10-21 13:01:08 -07:00
sched.c sched: x86: Name old_perf in a unique way 2009-09-16 11:21:07 +02:00
topology.c x86, cpu: Split addon_cpuid_features.c 2010-07-19 19:02:41 -07:00
transmeta.c x86, cpu: mv display_cacheinfo -> cpu_detect_cache_sizes 2009-11-23 11:59:53 -08:00
umc.c x86: move various CPU initialization objects into .cpuinit.rodata 2009-03-12 13:13:07 +01:00
vmware.c x86: Fix common misspellings 2011-03-18 10:39:30 +01:00