K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2009-01-17T14:45:07.401950Z
K 7
svn:log
V 450
MFC r186719:
Extend the struct vm_page wire_count to u_int to avoid the overflow of
the counter, that may happen when too many sendfile(2) calls are being
executed with this vnode.

To keep the size of the struct vm_page and offsets of the fields
accessed by out-of-tree modules, swap the types and locations of the
wire_count and cow fields. Add safety checks to detect cow overflow and
force fallback to the normal copy code for zero-copy sockets.

END