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authorLinus Torvalds <torvalds@linux-foundation.org>2013-07-13 17:42:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-13 17:42:22 -0700
commitbe9c6d9169705504296bdb42ffec8f406691d99f (patch)
tree60e25d5f33f80a1c09476e770b89ca4661f2e944 /Documentation
parent03ce3ca4b02bfc1e6567a7851ae231ad3cc9418e (diff)
parent307f2fb95e9b96b3577916e73d92e104f8f26494 (diff)
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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller: "Just a bunch of small fixes and tidy ups: 1) Finish the "busy_poll" renames, from Eliezer Tamir. 2) Fix RCU stalls in IFB driver, from Ding Tianhong. 3) Linearize buffers properly in tun/macvtap zerocopy code. 4) Don't crash on rmmod in vxlan, from Pravin B Shelar. 5) Spinlock used before init in alx driver, from Maarten Lankhorst. 6) A sparse warning fix in bnx2x broke TSO checksums, fix from Dmitry Kravkov. 7) Dummy and ifb driver load failure paths can oops, fixes from Tan Xiaojun and Ding Tianhong. 8) Correct MTU calculations in IP tunnels, from Alexander Duyck. 9) Account all TCP retransmits in SNMP stats properly, from Yuchung Cheng. 10) atl1e and via-rhine do not handle DMA mapping failures properly, from Neil Horman. 11) Various equal-cost multipath route fixes in ipv6 from Hannes Frederic Sowa" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (36 commits) ipv6: only static routes qualify for equal cost multipathing via-rhine: fix dma mapping errors atl1e: fix dma mapping warnings tcp: account all retransmit failures usb/net/r815x: fix cast to restricted __le32 usb/net/r8152: fix integer overflow in expression net: access page->private by using page_private net: strict_strtoul is obsolete, use kstrtoul instead drivers/net/ieee802154: don't use devm_pinctrl_get_select_default() in probe drivers/net/ethernet/cadence: don't use devm_pinctrl_get_select_default() in probe drivers/net/can/c_can: don't use devm_pinctrl_get_select_default() in probe net/usb: add relative mii functions for r815x net/tipc: use %*phC to dump small buffers in hex form qlcnic: Adding Maintainers. gre: Fix MTU sizing check for gretap tunnels pkt_sched: sch_qfq: remove forward declaration of qfq_update_agg_ts pkt_sched: sch_qfq: improve efficiency of make_eligible gso: Update tunnel segmentation to support Tx checksum offload inet: fix spacing in assignment ifb: fix oops when loading the ifb failed ...
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/sysctl/net.txt17
1 files changed, 9 insertions, 8 deletions
diff --git a/Documentation/sysctl/net.txt b/Documentation/sysctl/net.txt
index d69e14c9002c..1c15043aaee4 100644
--- a/Documentation/sysctl/net.txt
+++ b/Documentation/sysctl/net.txt
@@ -50,26 +50,27 @@ The maximum number of packets that kernel can handle on a NAPI interrupt,
it's a Per-CPU variable.
Default: 64
-low_latency_read
+busy_read
----------------
Low latency busy poll timeout for socket reads. (needs CONFIG_NET_LL_RX_POLL)
Approximate time in us to busy loop waiting for packets on the device queue.
-This sets the default value of the SO_LL socket option.
-Can be set or overridden per socket by setting socket option SO_LL, which is
-the preferred method of enabling.
-If you need to enable the feature globally via sysctl, a value of 50 is recommended.
+This sets the default value of the SO_BUSY_POLL socket option.
+Can be set or overridden per socket by setting socket option SO_BUSY_POLL,
+which is the preferred method of enabling. If you need to enable the feature
+globally via sysctl, a value of 50 is recommended.
Will increase power usage.
Default: 0 (off)
-low_latency_poll
+busy_poll
----------------
Low latency busy poll timeout for poll and select. (needs CONFIG_NET_LL_RX_POLL)
Approximate time in us to busy loop waiting for events.
Recommended value depends on the number of sockets you poll on.
For several sockets 50, for several hundreds 100.
For more than that you probably want to use epoll.
-Note that only sockets with SO_LL set will be busy polled, so you want to either
-selectively set SO_LL on those sockets or set sysctl.net.low_latency_read globally.
+Note that only sockets with SO_BUSY_POLL set will be busy polled,
+so you want to either selectively set SO_BUSY_POLL on those sockets or set
+sysctl.net.busy_read globally.
Will increase power usage.
Default: 0 (off)