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Fix a bug in r222586. Lock the page owner object around the modification

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of the m->dirty.

Reported and tested by:	nwhitehorn
Reviewed by:	alc
This commit is contained in:
Konstantin Belousov 2011-06-11 20:13:28 +00:00
parent 698ef695bc
commit 9d17da3bef
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=222991
1 changed files with 6 additions and 0 deletions
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6
sys/vm/vnode_pager.c
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@ -1195,8 +1195,13 @@ vnode_pager_generic_putpages(struct vnode *vp, vm_page_t *ma, int bytecount,
void
vnode_pager_undirty_pages(vm_page_t *ma, int *rtvals, int written)
{
vm_object_t obj;
int i, pos;
if (written == 0)
return;
obj = ma[0]->object;
VM_OBJECT_LOCK(obj);
for (i = 0, pos = 0; pos < written; i++, pos += PAGE_SIZE) {
if (pos < trunc_page(written)) {
rtvals[i] = VM_PAGER_OK;
@ -1207,4 +1212,5 @@ vnode_pager_undirty_pages(vm_page_t *ma, int *rtvals, int written)
vm_page_clear_dirty(ma[i], 0, written & PAGE_MASK);
}
}
VM_OBJECT_UNLOCK(obj);
}