From 5c85ea8f7efbaf448334fd682858fa23a7b800ed Mon Sep 17 00:00:00 2001
From: bobijam <bobijam>
Date: Mon, 4 Aug 2008 02:57:42 +0000
Subject: [PATCH] Branch HEAD b=16205 i=adilger, zhen.liang
Handle TCP_BACKOFF in msec or sec.
---
lnet/autoconf/lustre-lnet.m4 | 3 +++
lnet/klnds/socklnd/socklnd_lib-linux.c | 6 ++++++
2 files changed, 9 insertions(+)
diff --git a/lnet/autoconf/lustre-lnet.m4 b/lnet/autoconf/lustre-lnet.m4
index 734d8023be..bd0e21ea15 100644
--- a/lnet/autoconf/lustre-lnet.m4
+++ b/lnet/autoconf/lustre-lnet.m4
@@ -127,6 +127,9 @@ else
if test "$BOCD" != 0 ; then
AC_DEFINE(SOCKNAL_BACKOFF, 1, [use tunable backoff TCP])
AC_MSG_RESULT(yes)
+ if grep rto_max $LINUX/include/linux/tcp.h|grep -q __u16; then
+ AC_DEFINE(SOCKNAL_BACKOFF_MS, 1, [tunable backoff TCP in ms])
+ fi
else
AC_MSG_RESULT([no (no kernel support)])
fi
diff --git a/lnet/klnds/socklnd/socklnd_lib-linux.c b/lnet/klnds/socklnd/socklnd_lib-linux.c
index 821522d139..0eb0997c9b 100644
--- a/lnet/klnds/socklnd/socklnd_lib-linux.c
+++ b/lnet/klnds/socklnd/socklnd_lib-linux.c
@@ -790,6 +790,9 @@ ksocknal_lib_setup_sock (struct socket *sock)
#ifdef SOCKNAL_BACKOFF
if (*ksocknal_tunables.ksnd_backoff_init > 0) {
option = *ksocknal_tunables.ksnd_backoff_init;
+#ifdef SOCKNAL_BACKOFF_MS
+ option *= 1000;
+#endif
set_fs (KERNEL_DS);
rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_BACKOFF_INIT,
@@ -804,6 +807,9 @@ ksocknal_lib_setup_sock (struct socket *sock)
if (*ksocknal_tunables.ksnd_backoff_max > 0) {
option = *ksocknal_tunables.ksnd_backoff_max;
+#ifdef SOCKNAL_BACKOFF_MS
+ option *= 1000;
+#endif
set_fs (KERNEL_DS);
rc = sock->ops->setsockopt (sock, SOL_TCP, TCP_BACKOFF_MAX,
--
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