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

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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.)
This commit is contained in:
Alan Cox 2009-06-13 18:35:29 +00:00
parent c1f192193d
commit cd2b3416c3
1 changed files with 2 additions and 7 deletions
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9
sys/powerpc/booke/pmap.c
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@ -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);