tree a0f7baa86b26ebde34ccfed77995ba8bd3948858
parent c68a4cfdc54301d4ac7365d291dbe4af52b1294b
author Maxim Dounin <mdounin@mdounin.ru> 1328445756 +0000
committer Maxim Dounin <mdounin@mdounin.ru> 1328445756 +0000

Merge r4336:

Microoptimization of sendfile(2) usage under FreeBSD.

FreeBSD kernel checks headers/trailers pointer against NULL, not
corresponding count.  Passing NULL if there are no headers/trailers
helps to avoid unneeded work in kernel, as well as unexpected 0 bytes
GIO in traces.