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Hold the lock on the containing vm object when calling

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vm_page_sleep_if_busy().
This commit is contained in:
Alan Cox 2004-10-26 06:58:26 +00:00
parent 9b7cc97f6c
commit cd9c0da805
1 changed files with 2 additions and 0 deletions
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2
sys/kern/vfs_bio.c
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@ -2820,6 +2820,7 @@ allocbuf(struct buf *bp, int size)
if (desiredpages < bp->b_npages) { if (desiredpages < bp->b_npages) {
vm_page_t m; vm_page_t m;
VM_OBJECT_LOCK(bp->b_object);
vm_page_lock_queues(); vm_page_lock_queues();
for (i = desiredpages; i < bp->b_npages; i++) { for (i = desiredpages; i < bp->b_npages; i++) {
/* /*
@ -2837,6 +2838,7 @@ allocbuf(struct buf *bp, int size)
vm_page_unwire(m, 0); vm_page_unwire(m, 0);
} }
vm_page_unlock_queues(); vm_page_unlock_queues();
VM_OBJECT_UNLOCK(bp->b_object);
pmap_qremove((vm_offset_t) trunc_page((vm_offset_t)bp->b_data) + pmap_qremove((vm_offset_t) trunc_page((vm_offset_t)bp->b_data) +
(desiredpages << PAGE_SHIFT), (bp->b_npages - desiredpages)); (desiredpages << PAGE_SHIFT), (bp->b_npages - desiredpages));
bp->b_npages = desiredpages; bp->b_npages = desiredpages;