Merge branch 'wip-zero-copy-bufferlist-last'

Reviewed-by: Samuel Just <[email protected]>

configure.ac

@@ -584,6 +584,20 @@ AC_CHECK_MEMBER([struct stat.st_mtimespec.tv_nsec],
   [AC_DEFINE(HAVE_STAT_ST_MTIMESPEC_TV_NSEC, 1,
     [Define if you have struct stat.st_mtimespec.tv_nsec])])
 
+# splice/tee
+AC_CHECK_FUNC([splice],
+	[AC_DEFINE([CEPH_HAVE_SPLICE], [], [splice(2) is supported])],
+	[])
+
+
+AC_CHECK_HEADERS([arpa/nameser_compat.h])
+
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <fcntl.h>
+F_SETPIPE_SZ]])],
+	[AC_DEFINE([CEPH_HAVE_SETPIPE_SZ], [], [F_SETPIPE_SZ is supported])],
+	[AC_MSG_NOTICE(["F_SETPIPE_SZ not found, zero-copy may be less efficent"])])
+
+
 AC_CHECK_HEADERS([arpa/nameser_compat.h])
 AC_CHECK_HEADERS([sys/prctl.h])
 AC_CHECK_FUNCS([prctl])