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Optimize TX coalescing by keeping pointer to last mbuf.

Description

Optimize TX coalescing by keeping pointer to last mbuf.

Before m_cat() each time traversed through all the coalesced chain.

MFC after: 1 week

(cherry picked from commit b85a67f54a40053e75658a17c620b89bafaba67f)

Details

Provenance
mavAuthored on Mar 2 2021, 4:31 AM
Parents
rG76d8d700f26c: Optimize out few extra memory accesses.
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