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Reorder statistics tracking and table lock acquisitions already in place

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to avoid race conditions updating the PVO statistics.
This commit is contained in:
Nathan Whitehorn 2010-09-09 16:06:55 +00:00
parent a8c0af5906
commit 61473c5fd1
1 changed files with 6 additions and 4 deletions
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10
sys/powerpc/aim/mmu_oea64.c
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@ -2424,7 +2424,6 @@ moea64_pvo_enter(pmap_t pm, uma_zone_t zone, struct pvo_head *pvo_head,
* 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 zone, struct pvo_head *pvo_head,
*/
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 *