Messages in this thread | | | Date | Thu, 21 Apr 2022 16:34:05 +0200 | Subject | Re: [RFC PATCH] kernel/cpu: restart cpu_up when hotplug is disabled | From | David Hildenbrand <> |
| |
On 21.04.22 16:31, David Hildenbrand wrote: >>> It's far from perfect I would say, but we really wanted to avoid >>> letting user space having to deal with retry logic. >> >> What's so hard with retry logic in user space? >> >> If you can come up with a reasonable argument why user space cannot be >> fixed, then there is certainly a better solution than slapping a >> msleep(5) at some random place into the code. > Most probably you're right and we should just retry in udev. Staring at > the history, it looks like the -EBUSY might have been returned forever, > so user space just never really triggered it on actual CPU hotplug > because it doesn't usually happen that cpu hotplug is disabled.
The last part was confusing: "on actual CPU hotplug because it doesn't usually happen that cpu hotplug is disabled when onlining a CPU that was just hotplugged."
-- Thanks,
David / dhildenb
| |