linux/kernel/irq
Rei Yamamoto c11ef9ded2 genirq/affinity: Consider that CPUs on nodes can be unbalanced
commit 08d835dff9 upstream.

If CPUs on a node are offline at boot time, the number of nodes is
different when building affinity masks for present cpus and when building
affinity masks for possible cpus. This causes the following problem:

In the case that the number of vectors is less than the number of nodes
there are cases where bits of masks for present cpus are overwritten when
building masks for possible cpus.

Fix this by excluding CPUs, which are not part of the current build mask
(present/possible).

[ tglx: Massaged changelog and added comment ]

Fixes: b825921990 ("genirq/affinity: Spread IRQs to all available NUMA nodes")
Signed-off-by: Rei Yamamoto <yamamoto.rei@jp.fujitsu.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220331003309.10891-1-yamamoto.rei@jp.fujitsu.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-20 09:34:20 +02:00
..
affinity.c genirq/affinity: Consider that CPUs on nodes can be unbalanced 2022-04-20 09:34:20 +02:00
autoprobe.c
chip.c genirq: Provide IRQCHIP_AFFINITY_PRE_STARTUP 2021-08-10 10:59:20 +02:00
cpuhotplug.c genirq/cpuhotplug: Demote debug printk to KERN_DEBUG 2021-08-24 09:16:20 +02:00
debug.h
debugfs.c
devres.c
dummychip.c
generic-chip.c genirq/generic_chip: Use struct_size() in kzalloc() 2021-08-10 15:35:20 +02:00
handle.c
internals.h
ipi.c genirq: Fix kernel-doc warnings in pm.c, msi.c and ipi.c 2021-08-11 14:33:35 +02:00
irq_sim.c
irqdesc.c genirq: Improve "hwirq" output in /proc and /sys/ 2021-07-30 23:07:31 +02:00
irqdomain.c irqchip fixes for 5.15, take #1 2021-09-24 14:11:04 +02:00
Kconfig
Makefile
manage.c genirq: Fix kernel doc indentation 2021-08-13 12:45:13 +02:00
matrix.c genirq/matrix: Fix kernel doc warnings for irq_matrix_alloc_managed() 2021-08-10 22:50:07 +02:00
migration.c
msi.c PCI/MSI: Move non-mask check back into low level accessors 2021-11-18 19:17:14 +01:00
pm.c genirq: Fix kernel-doc warnings in pm.c, msi.c and ipi.c 2021-08-11 14:33:35 +02:00
proc.c genirq: Improve "hwirq" output in /proc and /sys/ 2021-07-30 23:07:31 +02:00
resend.c
settings.h
spurious.c
timings.c Updates to the interrupt core and driver subsystems: 2021-08-30 14:38:37 -07:00