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o Use vm_pageq_remove_nowakeup() and vm_pageq_enqueue() in 

vm_page_zero_idle() instead of partially duplicated implementations.
   In particular, this change guarantees that the number of free pages
   in the free queue(s) matches the global free page count when Giant
   is released.

Submitted by:	peter (via his p4 "pmap" branch)
This commit is contained in:
Alan Cox 2002-07-16 19:39:40 +00:00
parent dde0429505
commit 072e9cbb50
1 changed files with 2 additions and 7 deletions
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9
sys/vm/vm_zeroidle.c
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@ -79,19 +79,14 @@ vm_page_zero_idle(void)
zero_state = 0;
m = vm_pageq_find(PQ_FREE, free_rover, FALSE);
if (m != NULL && (m->flags & PG_ZERO) == 0) {
vm_page_queues[m->queue].lcnt--;
TAILQ_REMOVE(&vm_page_queues[m->queue].pl, m, pageq);
m->queue = PQ_NONE;
vm_pageq_remove_nowakeup(m);
mtx_unlock_spin(&vm_page_queue_free_mtx);
mtx_unlock(&Giant);
pmap_zero_page_idle(m);
mtx_lock(&Giant);
mtx_lock_spin(&vm_page_queue_free_mtx);
vm_page_flag_set(m, PG_ZERO);
m->queue = PQ_FREE + m->pc;
vm_page_queues[m->queue].lcnt++;
TAILQ_INSERT_TAIL(&vm_page_queues[m->queue].pl, m,
pageq);
vm_pageq_enqueue(PQ_FREE + m->pc, m);
++vm_page_zero_count;
++cnt_prezero;
if (vm_page_zero_count >= ZIDLE_HI(cnt.v_free_count))