diff options
Diffstat (limited to 'usr/src/uts/common/xen/io/xnbu.c')
| -rw-r--r-- | usr/src/uts/common/xen/io/xnbu.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/usr/src/uts/common/xen/io/xnbu.c b/usr/src/uts/common/xen/io/xnbu.c index fa9604194b..f7e84987a1 100644 --- a/usr/src/uts/common/xen/io/xnbu.c +++ b/usr/src/uts/common/xen/io/xnbu.c @@ -20,7 +20,7 @@ */ /* - * Copyright 2007 Sun Microsystems, Inc. All rights reserved. + * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ @@ -432,6 +432,12 @@ xnbu_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) mr->m_callbacks = &xnb_callbacks; mr->m_min_sdu = 0; mr->m_max_sdu = XNBMAXPKT; + /* + * xnbu is a virtual device, and it is not associated with any + * physical device. Its margin size is determined by the maximum + * packet size it can handle, which is PAGESIZE. + */ + mr->m_margin = PAGESIZE - XNBMAXPKT - sizeof (struct ether_header); (void) memset(xnbp->xnb_mac_addr, 0xff, ETHERADDRL); xnbp->xnb_mac_addr[0] &= 0xfe; |