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Unblock the outgoing thread after we performed pmap_switch() to

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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.
This commit is contained in:
Marcel Moolenaar 2011-06-23 16:21:43 +00:00
parent e1b4a23921
commit ded49c2eae
1 changed files with 2 additions and 2 deletions
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4
sys/ia64/ia64/machdep.c
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@ -470,12 +470,12 @@ cpu_switch(struct thread *old, struct thread *new, struct mtx *mtx)
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();