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| author | Thomas Gleixner <tglx@linutronix.de> | 2015-12-31 16:30:52 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-03-03 15:07:31 -0800 |
| commit | 950c362bdfb191aa3b149493c0447c89845f3a87 (patch) | |
| tree | caf7728adaf2cebe453dbc1d22d68d2e76706089 | |
| parent | 00bb447126d363fbf401d973548b193828c83fb2 (diff) | |
| download | lwn-950c362bdfb191aa3b149493c0447c89845f3a87.tar.gz lwn-950c362bdfb191aa3b149493c0447c89845f3a87.zip | |
x86/irq: Remove outgoing CPU from vector cleanup mask
commit 56d7d2f4bbd00fb198b7907cb3ab657d06115a42 upstream.
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>
Link: http://lkml.kernel.org/r/20151231160107.045961667@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 a1938a62d10a..cbb6c10c3187 100644 --- a/arch/x86/kernel/apic/vector.c +++ b/arch/x86/kernel/apic/vector.c @@ -631,9 +631,23 @@ 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 |