Author: royger
Date: Wed May 11 10:10:25 2016
New Revision: 299423
URL: https://svnweb.freebsd.org/changeset/base/299423
Log:
xen/resume: only send BITMAP IPIs if CPUs > 1
This is quite harmless on HEAD, but it's worse on stable/10 where
lapic_ipi_vectored is the local APIC native IPI implementation. On
stable/10 cpu_ops.ipi_vectored should be used instead.
MFC after: 5 days
Sponsored by: Citrix Systems R&D
Modified:
head/sys/dev/xen/control/control.c
Modified: head/sys/dev/xen/control/control.c
==============================================================================
--- head/sys/dev/xen/control/control.c Wed May 11 10:10:11 2016
(r299422)
+++ head/sys/dev/xen/control/control.c Wed May 11 10:10:25 2016
(r299423)
@@ -260,14 +260,14 @@ xctrl_suspend()
gnttab_resume(NULL);
#ifdef SMP
- /* Send an IPI_BITMAP in case there are pending bitmap IPIs. */
- lapic_ipi_vectored(IPI_BITMAP_VECTOR, APIC_IPI_DEST_ALL);
if (!CPU_EMPTY(&cpu_suspend_map)) {
/*
* Now that event channels have been initialized,
* resume CPUs.
*/
resume_cpus(cpu_suspend_map);
+ /* Send an IPI_BITMAP in case there are pending bitmap IPIs. */
+ lapic_ipi_vectored(IPI_BITMAP_VECTOR, APIC_IPI_DEST_ALL);
}
#endif
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