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MFC r202406:

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Don't free mbuf chains when bge(4) fails to collapse the mbuf
  chains. This part of code is to enhance performance so failing the
  collapsing should not free TX frames. Otherwise bge(4) will
  unnecessarily drop frames which in turn can freeze the network
  connection.

  Reported by:	Igor Sysoev (is <> rambler-co dot ru)
  Tested by:	Igor Sysoev (is <> rambler-co dot ru)
This commit is contained in:
Pyun YongHyeon 2010-01-21 00:53:00 +00:00
parent 85f51ebea9
commit eac2bf0ee0
1 changed files with 2 additions and 5 deletions
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7
sys/dev/bge/if_bge.c
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@ -3948,11 +3948,8 @@ bge_encap(struct bge_softc *sc, struct mbuf **m_head, uint32_t *txidx)
m = m_defrag(m, M_DONTWAIT);
else
m = m_collapse(m, M_DONTWAIT, sc->bge_forced_collapse);
if (m == NULL) {
m_freem(*m_head);
*m_head = NULL;
return (ENOBUFS);
}
if (m == NULL)
m = *m_head;
*m_head = m;
}