svn commit: r212363 - head/sys/powerpc/aim

[Nathan Whitehorn]

Author: nwhitehorn
Date: Thu Sep  9 16:06:55 2010
New Revision: 212363
URL: http://svn.freebsd.org/changeset/base/212363

Log:
  Reorder statistics tracking and table lock acquisitions already in place
  to avoid race conditions updating the PVO statistics.

Modified:
  head/sys/powerpc/aim/mmu_oea64.c

Modified: head/sys/powerpc/aim/mmu_oea64.c
==============================================================================
--- head/sys/powerpc/aim/mmu_oea64.c    Thu Sep  9 15:45:11 2010        
(r212362)
+++ head/sys/powerpc/aim/mmu_oea64.c    Thu Sep  9 16:06:55 2010        
(r212363)
@@ -2424,7 +2424,6 @@ moea64_pvo_enter(pmap_t pm, uma_zone_t z
         * the bootstrap pool.
         */
 
-       moea64_pvo_enter_calls++;
        first = 0;
        bootstrap = (flags & PVO_BOOTSTRAP);
 
@@ -2444,6 +2443,8 @@ moea64_pvo_enter(pmap_t pm, uma_zone_t z
         */
        LOCK_TABLE();
 
+       moea64_pvo_enter_calls++;
+
        LIST_FOREACH(pvo, &moea64_pvo_table[ptegidx], pvo_olink) {
                if (pvo->pvo_pmap == pm && PVO_VADDR(pvo) == va) {
                        if ((pvo->pvo_pte.lpte.pte_lo & LPTE_RPGN) == pa &&
@@ -2608,14 +2609,15 @@ moea64_pvo_remove(struct pvo_entry *pvo)
         * if we aren't going to reuse it.
         */
        LIST_REMOVE(pvo, pvo_olink);
+
+       moea64_pvo_entries--;
+       moea64_pvo_remove_calls++;
+
        UNLOCK_TABLE();
 
        if (!(pvo->pvo_vaddr & PVO_BOOTSTRAP))
                uma_zfree((pvo->pvo_vaddr & PVO_MANAGED) ? moea64_mpvo_zone :
                    moea64_upvo_zone, pvo);
-
-       moea64_pvo_entries--;
-       moea64_pvo_remove_calls++;
 }
 
 static struct pvo_entry *
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