Author: nwhitehorn
Date: Tue Dec 28 17:02:15 2010
New Revision: 216765
URL: http://svn.freebsd.org/changeset/base/216765
Log:
Only keep track of PTE validity statistics for pages not locked in the
table. The 'locked' attribute is used to circumvent the regular page table
locking for some special pages, with the result that including locked pages
here causes races when updating the stats.
Modified:
head/sys/powerpc/aim/moea64_native.c
Modified: head/sys/powerpc/aim/moea64_native.c
==============================================================================
--- head/sys/powerpc/aim/moea64_native.c Tue Dec 28 16:57:29 2010
(r216764)
+++ head/sys/powerpc/aim/moea64_native.c Tue Dec 28 17:02:15 2010
(r216765)
@@ -281,7 +281,10 @@ moea64_pte_set_native(struct lpte *pt, s
EIEIO();
pt->pte_hi = pvo_pt->pte_hi;
PTESYNC();
- moea64_pte_valid++;
+
+ /* Keep statistics for unlocked pages */
+ if (!(pvo_pt->pte_hi & LPTE_LOCKED))
+ moea64_pte_valid++;
}
static void
@@ -310,7 +313,10 @@ moea64_pte_unset_native(mmu_t mmu, uintp
* Save the reg & chg bits.
*/
moea64_pte_synch_native(mmu, pt_cookie, pvo_pt);
- moea64_pte_valid--;
+
+ /* Keep statistics for unlocked pages */
+ if (!(pvo_pt->pte_hi & LPTE_LOCKED))
+ moea64_pte_valid--;
}
static void
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