Heiko Carstens f2db2e6cb3 [S390] pfault: cpu hotplug vs missing completion interrupts ... On cpu hot remove a PFAULT CANCEL command is sent to the hypervisor which in turn will cancel all outstanding pfault requests that have been issued on that cpu (the same happens with a SIGP cpu reset). The result is that we end up with uninterruptible processes where the interrupt that would wake up these processes never arrives. In order to solve this all processes which wait for a pfault completion interrupt get woken up after a cpu hot remove. The worst case that could happen is that they fault again and in turn need to wait again. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>		2011-05-23 10:24:29 +02:00
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asm	[S390] pfault: cpu hotplug vs missing completion interrupts	2011-05-23 10:24:29 +02:00