tree a5f390dae59ed792dc9140b68e4188ae7cb4e4a7
parent 8d3ef1a3b320f786d06170d5831555aa3910de64
author Maxim Dounin <mdounin@mdounin.ru> 1323621042 +0000
committer Maxim Dounin <mdounin@mdounin.ru> 1323621042 +0000

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.