AuxXxilium/linux_dsm_epyc7002
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98ad1cc14a
linux_dsm_epyc7002/arch/x86/kernel/cpu/mcheck
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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
..
Makefile ACPI, APEI, Generic Hardware Error Source memory error support 2010-05-19 22:41:16 -04:00
mce_amd.c x86, mce: Use mce_sysdev_ prefix to group functions 2011-06-16 12:10:16 +02:00
mce_intel.c locking, x86: mce: Annotate cmci_discover_lock as raw 2011-09-13 11:12:09 +02:00
mce-apei.c x86: Fix files explicitly requiring export.h for EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:30:35 -04:00
mce-inject.c x86/mce: Make mce_chrdev_ops 'static const' 2011-11-08 16:17:11 +01:00
mce-internal.h ACPI, APEI, Use ERST for persistent storage of MCE 2010-05-19 22:41:40 -04:00
mce-severity.c x86, mce, severity: Clean up trivial coding style problems 2011-06-16 12:10:07 +02:00
mce.c x86/mce: Make mce_chrdev_ops 'static const' 2011-11-08 16:17:11 +01:00
p5.c x86, mce: make mce_disabled boolean 2009-06-16 16:56:07 -07:00
therm_throt.c x86: Call idle notifier after irq_enter() 2011-12-11 10:31:38 -08:00
threshold.c x86: Call idle notifier after irq_enter() 2011-12-11 10:31:38 -08:00
winchip.c x86, mce: unify mce.h 2009-06-16 16:56:07 -07:00