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Lock the vm_object in vfs_busy_pages().

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alc 2003-04-20 00:17:05 +00:00
parent 3214ca63ea
commit c9e51c9b11
1 changed files with 4 additions and 0 deletions
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4
sys/kern/vfs_bio.c
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@ -3322,6 +3322,8 @@ vfs_busy_pages(struct buf * bp, int clear_modify)
KASSERT(bp->b_offset != NOOFFSET,
("vfs_busy_pages: no buffer offset"));
vfs_setdirty(bp);
if (obj != NULL)
VM_OBJECT_LOCK(obj);
retry:
vm_page_lock_queues();
for (i = 0; i < bp->b_npages; i++) {
@ -3365,6 +3367,8 @@ vfs_busy_pages(struct buf * bp, int clear_modify)
foff = (foff + PAGE_SIZE) & ~(off_t)PAGE_MASK;
}
vm_page_unlock_queues();
if (obj != NULL)
VM_OBJECT_UNLOCK(obj);
if (bogus)
pmap_qenter(trunc_page((vm_offset_t)bp->b_data), bp->b_pages, bp->b_npages);
}