Correct the method of waking the page daemon when the number of allocated

pv entries surpasses the high water mark.  The problem was that the page
daemon would only be awakened the first time that the high water mark was
surpassed.  (The variable "pagedaemon_waken" is a non-working vestige of
FreeBSD 4.x, in which it was external and reset by the page daemon whenever
it ran.  This reset allowed subsequent wakeups by the pv entry allocator.)

1 files changed, 2 insertions, 7 deletions

diff --git a/sys/powerpc/booke/pmap.c b/sys/powerpc/booke/pmap.c
index 5a9dc1c..904424d 100644
--- a/sys/powerpc/booke/pmap.c
+++ b/sys/powerpc/booke/pmap.c
@@ -156,8 +156,6 @@ static void mmu_booke_enter_locked(mmu_t, pmap_t, vm_offset_t, vm_page_t,
 unsigned int kptbl_min;		/* Index of the first kernel ptbl. */
 unsigned int kernel_ptbls;	/* Number of KVA ptbls. */
 
-static int pagedaemon_waken;
-
 /*
  * If user pmap is processed with mmu_booke_remove and the resident count
  * drops to 0, there are no more pages to remove, so we need not continue.
@@ -712,11 +710,8 @@ pv_alloc(void)
 	pv_entry_t pv;
 
 	pv_entry_count++;
-	if ((pv_entry_count > pv_entry_high_water) &&
-	    (pagedaemon_waken == 0)) {
-		pagedaemon_waken = 1;
-		wakeup(&vm_pages_needed);
-	}
+	if (pv_entry_count > pv_entry_high_water)
+		pagedaemon_wakeup();
 	pv = uma_zalloc(pvzone, M_NOWAIT);
 
 	return (pv);