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| author | marcel <marcel@FreeBSD.org> | 2003-05-19 06:05:30 +0000 |
|---|---|---|
| committer | marcel <marcel@FreeBSD.org> | 2003-05-19 06:05:30 +0000 |
| commit | 5d98f3c472df5592e8b5adc0549c2ece606416f5 (patch) | |
| tree | 731e0e8a24c0252b44569013830c43ca827d223b /sys/ia64 | |
| parent | cd7086c532d7fcc9f4b3277152396924b3dea95d (diff) | |
| download | FreeBSD-src-5d98f3c472df5592e8b5adc0549c2ece606416f5.zip FreeBSD-src-5d98f3c472df5592e8b5adc0549c2ece606416f5.tar.gz | |
Unconditionally set pcb_current_pmap. WIP versions of the code
previously committed cleared pcb_current_pmap prior to changing
the region registers, but that was removed before committing.
Since we don't normally (at all?) pass a NULL pointer, the bug
was mostly harmless. Fix it while I'm here...
I'm here because we need to have data serialization after writing
to the region registers. Not doing so was likely the cause of the
hangs we were experiencing. General exceptions in cpu_switch may
also be caused by the lack of serialization.
Approved by: re (blanket)
Diffstat (limited to 'sys/ia64')
| -rw-r--r-- | sys/ia64/ia64/pmap.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/ia64/ia64/pmap.c b/sys/ia64/ia64/pmap.c index 94003f3..c76871e 100644 --- a/sys/ia64/ia64/pmap.c +++ b/sys/ia64/ia64/pmap.c @@ -2558,8 +2558,9 @@ pmap_switch(pmap_t pm) (pm->pm_rid[i] << 8)|(PAGE_SHIFT << 2)|1); } atomic_set_32(&pm->pm_active, PCPU_GET(cpumask)); - PCPU_SET(current_pmap, pm); } + PCPU_SET(current_pmap, pm); + __asm __volatile("srlz.d"); return (prevpm); } |
