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We have some space in the external mbufs so use this space for

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the external buffer reference count. This saves us a malloc() + free()
per small receive mbuf.
This commit is contained in:
Hartmut Brandt 2003-10-29 13:21:38 +00:00
parent 7672807356
commit 908b018b49
2 changed files with 5 additions and 2 deletions
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6
sys/dev/hatm/if_hatm_intr.c
View file

@ -426,8 +426,9 @@ hatm_rx_buffer(struct hatm_softc *sc, u_int group, u_int handle)
c0->hdr.chunkno, chunkno));
if (m != NULL) {
m->m_ext.ref_cnt = &c0->hdr.ref_cnt;
m_extadd(m, (void *)c0, MBUF0_SIZE,
hatm_mbuf0_free, sc, M_PKTHDR, EXT_NET_DRV);
hatm_mbuf0_free, sc, M_PKTHDR, EXT_EXTREF);
m->m_data += MBUF0_OFFSET;
} else
hatm_mbuf0_free(c0, sc);
@ -442,8 +443,9 @@ hatm_rx_buffer(struct hatm_softc *sc, u_int group, u_int handle)
c1->hdr.chunkno, chunkno));
if (m != NULL) {
m->m_ext.ref_cnt = &c1->hdr.ref_cnt;
m_extadd(m, (void *)c1, MBUF1_SIZE,
hatm_mbuf1_free, sc, M_PKTHDR, EXT_NET_DRV);
hatm_mbuf1_free, sc, M_PKTHDR, EXT_EXTREF);
m->m_data += MBUF1_OFFSET;
} else
hatm_mbuf1_free(c1, sc);

1
sys/dev/hatm/if_hatmvar.h
View file

@ -275,6 +275,7 @@ struct mbuf_page {
struct mbuf_chunk_hdr {
uint16_t pageno;
uint16_t chunkno;
u_int ref_cnt;
};
#define MBUFX_STORAGE_SIZE(X) (MBUF##X##_CHUNK \