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- Add vm object locking to vfs_clean_pages() and vfs_bio_set_validclean().

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This is to synchronize access to the vm page's valid field by
   vm_page_set_validclean().
This commit is contained in:
Alan Cox 2003-10-19 20:39:06 +00:00
parent d1b8bf476c
commit 48ae2dddac
1 changed files with 4 additions and 2 deletions
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6
sys/kern/vfs_bio.c
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@ -3446,14 +3446,13 @@ vfs_clean_pages(struct buf * bp)
{
int i;
GIANT_REQUIRED;
if (bp->b_flags & B_VMIO) {
vm_ooffset_t foff;
foff = bp->b_offset;
KASSERT(bp->b_offset != NOOFFSET,
("vfs_clean_pages: no buffer offset"));
VM_OBJECT_LOCK(bp->b_object);
vm_page_lock_queues();
for (i = 0; i < bp->b_npages; i++) {
vm_page_t m = bp->b_pages[i];
@ -3467,6 +3466,7 @@ vfs_clean_pages(struct buf * bp)
foff = noff;
}
vm_page_unlock_queues();
VM_OBJECT_UNLOCK(bp->b_object);
}
}
@ -3495,6 +3495,7 @@ vfs_bio_set_validclean(struct buf *bp, int base, int size)
base += (bp->b_offset & PAGE_MASK);
n = PAGE_SIZE - (base & PAGE_MASK);
VM_OBJECT_LOCK(bp->b_object);
vm_page_lock_queues();
for (i = base / PAGE_SIZE; size > 0 && i < bp->b_npages; ++i) {
vm_page_t m = bp->b_pages[i];
@ -3508,6 +3509,7 @@ vfs_bio_set_validclean(struct buf *bp, int base, int size)
n = PAGE_SIZE;
}
vm_page_unlock_queues();
VM_OBJECT_UNLOCK(bp->b_object);
}
}