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| author | Shijith Thotton <sthotton@marvell.com> | 2019-07-05 07:56:20 +0000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-07-06 10:40:19 +0200 |
| commit | c09cb1293523dd786ae54a12fd88001542cba2f6 (patch) | |
| tree | d8844077305fe22afc3c14a56da1969153d7419f /kernel/irq/chip.c | |
| parent | 9b979ac3ce0b2a3e55cd1b866eaeaed4e1c38df9 (diff) | |
| download | lwn-c09cb1293523dd786ae54a12fd88001542cba2f6.tar.gz lwn-c09cb1293523dd786ae54a12fd88001542cba2f6.zip | |
genirq: Update irq stats from NMI handlers
The NMI handlers handle_percpu_devid_fasteoi_nmi() and handle_fasteoi_nmi()
do not update the interrupt counts. Due to that the NMI interrupt count
does not show up correctly in /proc/interrupts.
Add the statistics and treat the NMI handlers in the same way as per cpu
interrupts and prevent them from updating irq_desc::tot_count as this might
be corrupted due to concurrency.
[ tglx: Massaged changelog ]
Fixes: 2dcf1fbcad35 ("genirq: Provide NMI handlers")
Signed-off-by: Shijith Thotton <sthotton@marvell.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1562313336-11888-1-git-send-email-sthotton@marvell.com
Diffstat (limited to 'kernel/irq/chip.c')
| -rw-r--r-- | kernel/irq/chip.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 29d6c7d070b4..04c850fb70cb 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -748,6 +748,8 @@ void handle_fasteoi_nmi(struct irq_desc *desc) unsigned int irq = irq_desc_get_irq(desc); irqreturn_t res; + __kstat_incr_irqs_this_cpu(desc); + trace_irq_handler_entry(irq, action); /* * NMIs cannot be shared, there is only one action. @@ -962,6 +964,8 @@ void handle_percpu_devid_fasteoi_nmi(struct irq_desc *desc) unsigned int irq = irq_desc_get_irq(desc); irqreturn_t res; + __kstat_incr_irqs_this_cpu(desc); + trace_irq_handler_entry(irq, action); res = action->handler(irq, raw_cpu_ptr(action->percpu_dev_id)); trace_irq_handler_exit(irq, action, res); |