On 2020-08-13 09:08, Thomas Gleixner wrote:
Yunfeng Ye <yeyunf...@huawei.com> writes:
[...]
You are looking at the wrong file. /proc/irq/$IRQ/smp_affinity* is the
possible mask. If you want to know to which CPU an interrupt is affine
then look at /proc/irq/$IRQ/effective_affinity*
If effective_affinity* is not showing the correct value, then the irq
chip affinity setter is broken and needs to be fixed.
In order to reassure myself that nothing was untoward in GIC-land,
I went in and looked at an ITS-based VM running whatever is in
Linus' tree today. I see the effective affinity being correctly
setup, and being as expected a subset of the affinity. This is
without isolcpu though.
In any case, I'd be interested in understanding what this patch is
trying to solve, really.
M.
--
Who you jivin' with that Cosmik Debris?
