How can I allocate big mbufs in a device driver?

[Aaron Schuman]

Jack Jansen asked for the calling sequence for m_vget.  I hope this
brief code excerpt helps:


/* get a variable-sized cluster
 *      If you ask for a full page of CLBYTES bytes, you will get a full
 *      page in a different format.
 *
 *      In any case, the length field will be set to the requested size.
 */
struct mbuf *                           /* 0 or little-mbuf-header */
m_vget(canwait, size, type)
int canwait;                            /* 1=ok to sleep */
int size;                               /* desired data size in bytes */
int type;