Messages in this thread | | | Date | Tue, 14 Jul 2015 17:44:42 +0200 (CEST) | From | Thomas Gleixner <> | Subject | Re: [patch 1/4] hotplug: Prevent alloc/free of irq descriptors during cpu up/down |
| |
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
| |