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kernel-ark/arch/x86/kernel/apic
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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
..
apic_flat_64.c x86, apic: Include module.h header in apic_flat_64.c 2011-05-23 21:27:35 +02:00
apic_noop.c x86-32, NUMA: Make apic->x86_32_numa_cpu_node() optional 2011-05-02 14:18:52 +02:00
apic.c x86: Call idle notifier after irq_enter() 2011-12-11 10:31:38 -08:00
bigsmp_32.c apic, i386/bigsmp: Fix false warnings regarding logical APIC ID mismatches 2011-09-28 19:01:53 +02:00
es7000_32.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
hw_nmi.c x86, nmi: Wire up NMI handlers to new routines 2011-10-10 06:56:57 +02:00
io_apic.c x86: Call idle notifier after irq_enter() 2011-12-11 10:31:38 -08:00
ipi.c x86: Always use x86_cpu_to_logical_apicid for cpu -> logical apic id 2011-01-28 14:54:05 +01:00
Makefile x86, apic: Introduce .apicdrivers section to find the list of apic drivers 2011-05-22 11:48:03 +02:00
numaq_32.c x86, apic: Make apic drivers static 2011-05-22 11:48:04 +02:00
probe_32.c apic, i386/bigsmp: Fix false warnings regarding logical APIC ID mismatches 2011-09-28 19:01:53 +02:00
probe_64.c x86, apic: Make apic drivers static 2011-05-22 11:48:04 +02:00
summit_32.c x86, apic: Make apic drivers static 2011-05-22 11:48:04 +02:00
x2apic_cluster.c x86, apic: Make apic drivers static 2011-05-22 11:48:04 +02:00
x2apic_phys.c x86, apic: Make apic drivers static 2011-05-22 11:48:04 +02:00
x2apic_uv_x.c x86, UV: Fix UV2 hub part number 2011-12-05 11:49:52 +01:00