K 10
svn:author
V 5
luigi
K 8
svn:date
V 27
2002-08-04T05:36:22.000000Z
K 7
svn:log
V 574
MFC: add m_getcl() as a preferred way to get an mbuf with an
attached cluster.

Now that we have this interface both in -current and -stable, each
network device driver can replace the call to MGETHDR/MCLGET with
calls to m_getcl(), saving (on -stable) about 400 bytes and the
associated cache pollution.

Also, slightly modify m_freem() so that it keeps a small free list
(controlled by kern.ipc.mcl_pool_max) of such buffers for use in m_getcl().
Even a small size such as 10 elements gives about 10% improvement
in the peak forwarding performance in bridges and routers.

END