Hello!
> 1st Question: It is guaranteed that the timer interrupt will go to
> all CPUs _soon_???
After it will tick on each cpu. It is not very soon. 8)
Blocking in __kmem_cache_shrink to wait for this looks like a bug.
> 2nd Question: Is there a sane way to queue an operation to be done in
> each specific CPU?
smp_call_function().
If you cannot complete the operation on hard irq, you raise some softirq
to complete it.
Alexey
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