Messages in this thread | | | Date | Wed, 5 Jul 2017 22:10:18 +0800 | From | Chen Yu <> | Subject | Re: [PATCH][RFC] x86: Fix the irq affinity in fixup_cpus |
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On Wed, Jul 05, 2017 at 08:46:08AM +0200, Thomas Gleixner wrote: > On Wed, 5 Jul 2017, Chen Yu wrote: > > On Tue, Jul 04, 2017 at 10:50:33AM +0200, Thomas Gleixner wrote: > > Here's the test result for affinity: > > # uname -r > > 4.12.0+ > > # cat /proc/irq/32/smp_affinity > > 00000000,80000000 > > # echo 0 > /sys/devices/system/cpu/cpu31/online > > # cat /proc/irq/32/smp_affinity > > 00000000,ffffffff > > Looks like cpu31 is till included in the irq mask. > > Yes, because the offline broke affinity and now it's reset to the default > affinity mask. /proc/irq/*/affinity is the affinity which is allowed by the > admin, not the one which is effective. > > Look at /proc/irq/32/effective_affinity to see where it's really routed to. > ok, got it, this is normal now. cat /proc/irq/32/effective_affinity 00000000,00000001
Thanks, Yu
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