diff options
| author |   Thomas Gleixner <tglx@linutronix.de> | 2015-12-31 16:30:52 +0000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-01-15 13:44:01 +0100 |
| commit | 56d7d2f4bbd00fb198b7907cb3ab657d06115a42 (patch) | |
| tree | 68abc85548849ef65c4501c647e1ae3e2d0015be /arch/x86/kernel | |
| parent | x86/irq: Remove the cpumask allocation from send_cleanup_vector() (diff) | |
| download | linux-dev-56d7d2f4bbd00fb198b7907cb3ab657d06115a42.tar.xz linux-dev-56d7d2f4bbd00fb198b7907cb3ab657d06115a42.zip | |
x86/irq: Remove outgoing CPU from vector cleanup mask
We want to synchronize new vector assignments with a pending cleanup. Remove a
dying cpu from a pending cleanup mask.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Borislav Petkov <bp@alien8.de>
Tested-by: Joe Lawrence <joe.lawrence@stratus.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Jeremiah Mahler <jmmahler@gmail.com>
Cc: andy.shevchenko@gmail.com
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: stable@vger.kernel.org #4.3+
Link: http://lkml.kernel.org/r/20151231160107.045961667@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/apic/vector.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c index 91dc2742cfb1..a7fa11e49582 100644 --- a/arch/x86/kernel/apic/vector.c +++ b/arch/x86/kernel/apic/vector.c @@ -633,9 +633,23 @@ void irq_complete_move(struct irq_cfg *cfg) void irq_force_complete_move(int irq) { struct irq_cfg *cfg = irq_cfg(irq); + struct apic_chip_data *data; + + if (!cfg) + return; - if (cfg) - __irq_complete_move(cfg, cfg->vector); + __irq_complete_move(cfg, cfg->vector); + + /* + * Remove this cpu from the cleanup mask. The IPI might have been sent + * just before the cpu was removed from the offline mask, but has not + * been processed because the CPU has interrupts disabled and is on + * the way out. + */ + raw_spin_lock(&vector_lock); + data = container_of(cfg, struct apic_chip_data, cfg); + cpumask_clear_cpu(smp_processor_id(), data->old_domain); + raw_spin_unlock(&vector_lock); } #endif |