Bitao Hu 99cf63c566 genirq: Provide a snapshot mechanism for interrupt statistics ... The soft lockup detector lacks a mechanism to identify interrupt storms as root cause of a lockup. To enable this the detector needs a mechanism to snapshot the interrupt count statistics on a CPU when the detector observes a potential lockup scenario and compare that against the interrupt count when it warns about the lockup later on. The number of interrupts in that period give a hint whether the lockup might have been caused by an interrupt storm. Instead of having extra storage in the lockup detector and accessing the internals of the interrupt descriptor directly, add a snapshot member to the per CPU irq_desc::kstat_irq structure and provide interfaces to take a snapshot of all interrupts on the current CPU and to retrieve the delta of a specific interrupt later on. Originally-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Bitao Hu <yaoma@linux.alibaba.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20240411074134.30922-3-yaoma@linux.alibaba.com		2024-04-12 17:08:05 +02:00
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affinity.c
autoprobe.c
chip.c
cpuhotplug.c
debug.h
debugfs.c
devres.c
dummychip.c
generic-chip.c
handle.c
internals.h	genirq: Convert kstat_irqs to a struct	2024-04-12 17:08:05 +02:00
ipi-mux.c
ipi.c
irq_sim.c	genirq/irq_sim: Shrink code by using <linux/cleanup.h> helpers	2024-01-29 11:07:57 +01:00
irqdesc.c	genirq: Provide a snapshot mechanism for interrupt statistics	2024-04-12 17:08:05 +02:00
irqdomain.c	irqdomain: Check virq for 0 before use in irq_dispose_mapping()	2024-04-08 12:08:58 +02:00
Kconfig	genirq: Provide a snapshot mechanism for interrupt statistics	2024-04-12 17:08:05 +02:00
Makefile
manage.c	genirq: Wake interrupt threads immediately when changing affinity	2024-02-19 11:43:46 +01:00
matrix.c	genirq/matrix: Dynamic bitmap allocation	2024-02-23 10:18:44 +01:00
migration.c
msi.c	genirq/msi: Provide MSI_FLAG_PARENT_PM_DEV	2024-02-15 17:55:41 +01:00
pm.c
proc.c	genirq: Convert kstat_irqs to a struct	2024-04-12 17:08:05 +02:00
resend.c
settings.h
spurious.c
timings.c