[PATCH net-next v6 3/9] kbuild: document RPS/XPS network Kconfig options
From: David Decotigny <hidden>
Date: 2011-11-16 22:17:49
Also in:
lkml
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
This adds a description of RPS/XPS options and allow them to be changed at make menuconfig time. It also fixes following checkpatch syntax warnings: ERROR: trailing whitespace +^I $ ERROR: trailing whitespace +^I$ Signed-off-by: David Decotigny <redacted> --- net/Kconfig | 22 +++++++++++++++++----- 1 files changed, 17 insertions(+), 5 deletions(-)
diff --git a/net/Kconfig b/net/Kconfig
index a073148..8e2104e 100644
--- a/net/Kconfig
+++ b/net/Kconfig@@ -10,7 +10,7 @@ menuconfig NET The reason is that some programs need kernel networking support even when running on a stand-alone machine that isn't connected to any other computer. - + If you are upgrading from an older kernel, you should consider updating your networking tools too because changes in the kernel and the tools often go hand in hand. The tools are
@@ -217,20 +217,33 @@ source "net/dns_resolver/Kconfig" source "net/batman-adv/Kconfig" config RPS - boolean + boolean "Enable Receive Packet Steering" depends on SMP && SYSFS && USE_GENERIC_SMP_HELPERS default y + help + RPS distributes the load of received packet processing + across multiple CPUs. If unsure, say Y. config RFS_ACCEL - boolean + boolean "Enable Hardware Acceleration of RFS" depends on RPS && GENERIC_HARDIRQS select CPU_RMAP default y + help + This is the hardware version of RPS. On multi-queue network + devices, this configures the hardware to distribute the + received packets across multiple CPUs. If unsure, say Y. config XPS - boolean + boolean "Enable Transmit Packet Steering" depends on SMP && SYSFS && USE_GENERIC_SMP_HELPERS default y + help + For multiqueue devices, XPS selects a transmit queue during + packet transmission based on configuration. This is done by + mapping the CPU transmitting the packet to a queue. XPS can + reduce transmit network latency on SMP systems. If unsure, + say Y. config HAVE_BPF_JIT bool
@@ -274,7 +287,6 @@ config NET_TCPPROBE Documentation on how to use TCP connection probing can be found at: - http://www.linuxfoundation.org/collaborate/workgroups/networking/tcpprobe To compile this code as a module, choose M here: the
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1.7.3.1