On Tue, 14 Jul 2015, Boris Ostrovsky wrote:
> > Prevent allocation and freeing of interrupt descriptors accross cpu
> > hotplug.
>
>
> This breaks Xen guests that allocate interrupt descriptors in .cpu_up().
And where exactly does XEN allocate those descriptors?
> Any chance this locking can be moved into arch code?
No.
> (The patch doesn't appear to have any side effects for the down path since Xen
> guests deallocate descriptors in __cpu_die()).
Exact place please.
Thanks,
tglx
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