PERFORCE change 96460 for review
Kip Macy
kmacy at FreeBSD.org
Mon May 1 01:29:28 UTC 2006
http://perforce.freebsd.org/chv.cgi?CH=96460
Change 96460 by kmacy at kmacy_storage:sun4v_rwbuf on 2006/05/01 01:28:40
add missing bucket unlocks
Affected files ...
.. //depot/projects/kmacy_sun4v/src/sys/sun4v/sun4v/pmap.c#39 edit
Differences ...
==== //depot/projects/kmacy_sun4v/src/sys/sun4v/sun4v/pmap.c#39 (text+ko) ====
@@ -972,10 +972,9 @@
else
tte_data |= TTE_MINFLAGS;
- if ((otte_data & ~(VTD_W|VTD_REF)) != tte_data) {
+ if ((otte_data & ~(VTD_W|VTD_REF|VTD_LOCK)) != tte_data) {
if (otte_data & VTD_V) {
invlva = FALSE;
- *otte = tte_data;
if (otte_data & VTD_REF) {
if (otte_data & VTD_MANAGED)
vm_page_flag_set(om, PG_REFERENCED);
@@ -989,6 +988,11 @@
if ((prot & VM_PROT_WRITE) == 0)
invlva = TRUE;
}
+ DPRINTF("update *otte 0x%lx -> 0x%lx\n", otte_data, tte_data);
+ *otte = tte_data;
+
+ if (!(otte_data & VTD_LOCK))
+ tte_hash_bucket_unlock(pmap->pm_hash, va);
#ifdef notyet
if (invlva)
#endif
@@ -997,9 +1001,13 @@
tte_hash_insert(pmap->pm_hash, va, tte_data);
membar(Sync);
}
+ } else {
+ if (!(*otte & VTD_LOCK))
+ tte_hash_bucket_unlock(pmap->pm_hash, va);
+ else
+ *otte = (*otte & ~VTD_LOCK);
}
-
sched_unpin();
PMAP_UNLOCK(pmap);
vm_page_unlock_queues();
@@ -1556,7 +1564,11 @@
vm_page_t m;
retry:
tte = tte_hash_lookup(pmap->pm_hash, tva, TRUE);
- otte_data = tte_data = tte ? *tte : 0;
+ if (tte == NULL)
+ continue;
+
+ otte_data = tte_data = *tte;
+
if (tte_data & VTD_MANAGED) {
m = NULL;
if (tte_data & VTD_REF) {
@@ -1573,10 +1585,15 @@
tte_data &= ~(VTD_SW_W | VTD_W);
if (tte_data != otte_data) {
- if (!atomic_cmpset_long(tte, otte_data, tte_data))
+ if (!atomic_cmpset_long(tte, otte_data, tte_data)) {
+ /* XXX this should never happen with hash bucket locks - FIXME */
+ panic("bucket locked but tte data changed");
+ tte_hash_bucket_unlock(pmap->pm_hash, tva);
goto retry;
+ }
anychanged = 1;
}
+ tte_hash_bucket_unlock(pmap->pm_hash, tva);
}
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