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cxgbei: Rework the pdu_append_data hook to support M_WAITOK.
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Authored by jhb on Apr 21 2021, 11:59 PM.
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Summary
  • Only allocate 16K jumbo mbufs if the region of data to be appended is sufficiently large, and use a loop.
  • Use m_getm2() to allocate a chain for data less than 16K, or if m_getjcl() fails.
  • Use ENOMEM as the return value instead of '1' if the hook fails due to a memory allocation error.

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rG FreeBSD src repository
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