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o Convert two instances of vm_page_sleep_busy() to vm_page_sleep_if_busy()

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with appropriate page queue locking.
This commit is contained in:
Alan Cox 2002-08-03 18:59:19 +00:00
parent 9bb322433e
commit 3327872297
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=101279
1 changed files with 6 additions and 7 deletions
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13
sys/kern/vfs_bio.c
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@ -2640,6 +2640,7 @@ allocbuf(struct buf *bp, int size)
* if we have to remove any pages.
*/
if (desiredpages < bp->b_npages) {
vm_page_lock_queues();
for (i = desiredpages; i < bp->b_npages; i++) {
/*
* the page is not freed here -- it
@ -2649,14 +2650,13 @@ allocbuf(struct buf *bp, int size)
m = bp->b_pages[i];
KASSERT(m != bogus_page,
("allocbuf: bogus page found"));
while (vm_page_sleep_busy(m, TRUE, "biodep"))
;
while (vm_page_sleep_if_busy(m, TRUE, "biodep"))
vm_page_lock_queues();
bp->b_pages[i] = NULL;
vm_page_lock_queues();
vm_page_unwire(m, 0);
vm_page_unlock_queues();
}
vm_page_unlock_queues();
pmap_qremove((vm_offset_t) trunc_page((vm_offset_t)bp->b_data) +
(desiredpages << PAGE_SHIFT), (bp->b_npages - desiredpages));
bp->b_npages = desiredpages;
@ -2720,8 +2720,8 @@ allocbuf(struct buf *bp, int size)
* vm_fault->getpages->cluster_read->allocbuf
*
*/
if (vm_page_sleep_busy(m, FALSE, "pgtblk"))
vm_page_lock_queues();
if (vm_page_sleep_if_busy(m, FALSE, "pgtblk"))
continue;
/*
@ -2734,7 +2734,6 @@ allocbuf(struct buf *bp, int size)
(cnt.v_free_min + cnt.v_cache_min))) {
pagedaemon_wakeup();
}
vm_page_lock_queues();
vm_page_flag_clear(m, PG_ZERO);
vm_page_wire(m);
vm_page_unlock_queues();