Author: marcel
Date: Thu Jun 23 16:21:43 2011
New Revision: 223478
URL: http://svn.freebsd.org/changeset/base/223478
Log:
Unblock the outgoing thread after we performed pmap_switch() to
switch the region registers. pmap_switch() returns the pmap for
which the region register are currently programmed, which needs
to be re-programmed on the CPU the ougoing thread gets switched
in. This change does not noticibly change anything or fix known
bugs, but does give me a warm fuzzy feeling by being more
correct.
Modified:
head/sys/ia64/ia64/machdep.c
Modified: head/sys/ia64/ia64/machdep.c
==============================================================================
--- head/sys/ia64/ia64/machdep.c Thu Jun 23 15:53:17 2011
(r223477)
+++ head/sys/ia64/ia64/machdep.c Thu Jun 23 16:21:43 2011
(r223478)
@@ -470,12 +470,12 @@ cpu_switch(struct thread *old, struct th
if (PCPU_GET(fpcurthread) == old)
old->td_frame->tf_special.psr |= IA64_PSR_DFH;
if (!savectx(oldpcb)) {
- atomic_store_rel_ptr(&old->td_lock, mtx);
-
newpcb = new->td_pcb;
oldpcb->pcb_current_pmap =
pmap_switch(newpcb->pcb_current_pmap);
+ atomic_store_rel_ptr(&old->td_lock, mtx);
+
#if defined(SCHED_ULE) && defined(SMP)
while (atomic_load_acq_ptr(&new->td_lock) == &blocked_lock)
cpu_spinwait();
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