Author: avg
Date: Fri Nov 29 12:19:52 2013
New Revision: 258739
URL: http://svnweb.freebsd.org/changeset/base/258739
Log:
zfs mappedread_sf: assert that a page is never partially valid
ZFS never partially validates or invalidates a page.
The higher level VM should not do that either.
mappedread_sf correct operation depends on a page being either fully
valid or invalid.
MFC after: 7 days
Modified:
head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c Fri Nov
29 08:22:48 2013 (r258738)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c Fri Nov
29 12:19:52 2013 (r258739)
@@ -587,8 +587,10 @@ mappedread_sf(vnode_t *vp, int nbytes, u
vm_page_activate(pp);
}
vm_page_unlock(pp);
- } else
+ } else {
+ ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL);
vm_page_sunbusy(pp);
+ }
if (error)
break;
uio->uio_resid -= bytes;
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