From: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Date: Sat, 18 Jan 2014 20:24:58 +0000 (+0100)
Subject: cache: use sendfile() instead of a pair of read() + write()
X-Git-Url: https://gitweb.ps.run/ps-cgit/commitdiff_plain/d3581b58890389794de5d5222c91a0129873e95c?hp=d3581b58890389794de5d5222c91a0129873e95c

cache: use sendfile() instead of a pair of read() + write()

sendfile() does the same job and avoids to copy the content into userland
and back. One has to define NO_SENDFILE in case the OS (kernel / libc)
does not supported. It is disabled by default on non-linux environemnts.
According to the glibc, sendfile64() was added in Linux 2.4 (so it has
been there for a while) but after browsing over the mapage of FreeBSD's I
noticed that the prototype is little different.

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
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