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Improve multilink xmit performance by netgraph item reuse.

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This commit is contained in:
Alexander Motin 2008-01-26 22:41:14 +00:00
parent 93caf2e299
commit f9ec69904b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=175697
1 changed files with 13 additions and 3 deletions
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16
sys/netgraph/ng_ppp.c
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@ -1974,11 +1974,12 @@ ng_ppp_mp_xmit(node_p node, item_p item, uint16_t proto)
/* Extract mbuf. */
NGI_GET_M(item, m);
NG_FREE_ITEM(item);
/* Prepend protocol number, possibly compressed. */
if ((m = ng_ppp_addproto(m, proto, 1)) == NULL)
if ((m = ng_ppp_addproto(m, proto, 1)) == NULL) {
NG_FREE_ITEM(item);
return (ENOBUFS);
}
/* Clear distribution plan */
bzero(&distrib, priv->numActiveLinks * sizeof(distrib[0]));
@ -2067,6 +2068,8 @@ ng_ppp_mp_xmit(node_p node, item_p item, uint16_t proto)
if (n == NULL) {
NG_FREE_M(m);
if (firstFragment)
NG_FREE_ITEM(item);
return (ENOMEM);
}
m_tag_copy_chain(n, m, M_DONTWAIT);
@ -2100,11 +2103,18 @@ ng_ppp_mp_xmit(node_p node, item_p item, uint16_t proto)
if (m2 == NULL) {
if (!lastFragment)
m_freem(m);
if (firstFragment)
NG_FREE_ITEM(item);
return (ENOBUFS);
}
/* Send fragment */
if ((item = ng_package_data(m2, NG_NOFLAGS)) != NULL) {
if (firstFragment) {
NGI_M(item) = m2; /* Reuse original item. */
} else {
item = ng_package_data(m2, NG_NOFLAGS);
}
if (item != NULL) {
error = ng_ppp_link_xmit(node, item, PROT_MP,
linkNum, (firstFragment?plen:0));
if (error != 0) {