Author: kib
Date: Sat Jun 11 20:13:28 2011
New Revision: 222991
URL: http://svn.freebsd.org/changeset/base/222991
Log:
Fix a bug in r222586. Lock the page owner object around the modification
of the m->dirty.
Reported and tested by: nwhitehorn
Reviewed by: alc
Modified:
head/sys/vm/vnode_pager.c
Modified: head/sys/vm/vnode_pager.c
==============================================================================
--- head/sys/vm/vnode_pager.c Sat Jun 11 18:39:55 2011 (r222990)
+++ head/sys/vm/vnode_pager.c Sat Jun 11 20:13:28 2011 (r222991)
@@ -1195,8 +1195,13 @@ vnode_pager_generic_putpages(struct vnod
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,
vm_page_clear_dirty(ma[i], 0, written & PAGE_MASK);
}
}
+ VM_OBJECT_UNLOCK(obj);
}