1. 08 7月, 2014 1 次提交
    • T
      ipv6: Implement automatic flow label generation on transmit · cb1ce2ef
      Tom Herbert 提交于
      Automatically generate flow labels for IPv6 packets on transmit.
      The flow label is computed based on skb_get_hash. The flow label will
      only automatically be set when it is zero otherwise (i.e. flow label
      manager hasn't set one). This supports the transmit side functionality
      of RFC 6438.
      
      Added an IPv6 sysctl auto_flowlabels to enable/disable this behavior
      system wide, and added IPV6_AUTOFLOWLABEL socket option to enable this
      functionality per socket.
      
      By default, auto flowlabels are disabled to avoid possible conflicts
      with flow label manager, however if this feature proves useful we
      may want to enable it by default.
      
      It should also be noted that FreeBSD has already implemented automatic
      flow labels (including the sysctl and socket option). In FreeBSD,
      automatic flow labels default to enabled.
      
      Performance impact:
      
      Running super_netperf with 200 flows for TCP_RR and UDP_RR for
      IPv6. Note that in UDP case, __skb_get_hash will be called for
      every packet with explains slight regression. In the TCP case
      the hash is saved in the socket so there is no regression.
      
      Automatic flow labels disabled:
      
        TCP_RR:
          86.53% CPU utilization
          127/195/322 90/95/99% latencies
          1.40498e+06 tps
      
        UDP_RR:
          90.70% CPU utilization
          118/168/243 90/95/99% latencies
          1.50309e+06 tps
      
      Automatic flow labels enabled:
      
        TCP_RR:
          85.90% CPU utilization
          128/199/337 90/95/99% latencies
          1.40051e+06
      
        UDP_RR
          92.61% CPU utilization
          115/164/236 90/95/99% latencies
          1.4687e+06
      Signed-off-by: NTom Herbert <therbert@google.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      cb1ce2ef
  2. 02 7月, 2014 2 次提交
    • J
      pktgen: document tuning for max NIC performance · 9ceb87fc
      Jesper Dangaard Brouer 提交于
      Using pktgen I'm seeing the ixgbe driver "push-back", due TX ring
      running full.  Thus, the TX ring is artificially limiting pktgen.
      (Diagnose via "ethtool -S", look for "tx_restart_queue" or "tx_busy"
      counters.)
      
      Using ixgbe, the real reason behind the TX ring running full, is due
      to TX ring not being cleaned up fast enough. The ixgbe driver combines
      TX+RX ring cleanups, and the cleanup interval is affected by the
      ethtool --coalesce setting of parameter "rx-usecs".
      
      Do not increase the default NIC TX ring buffer or default cleanup
      interval.  Instead simply document that pktgen needs special NIC
      tuning for maximum packet per sec performance.
      
      Performance results with pktgen with clone_skb=100000.
      TX ring size 512 (default), adjusting "rx-usecs":
       (Single CPU performance, E5-2630, ixgbe)
       - 3935002 pps - rx-usecs:  1 (irqs:  9346)
       - 5132350 pps - rx-usecs: 10 (irqs: 99157)
       - 5375111 pps - rx-usecs: 20 (irqs: 50154)
       - 5454050 pps - rx-usecs: 30 (irqs: 33872)
       - 5496320 pps - rx-usecs: 40 (irqs: 26197)
       - 5502510 pps - rx-usecs: 50 (irqs: 21527)
      
      TX ring size adjusting (ethtool -G), "rx-usecs==1" (default):
       - 3935002 pps - tx-size:  512
       - 5354401 pps - tx-size:  768
       - 5356847 pps - tx-size: 1024
       - 5327595 pps - tx-size: 1536
       - 5356779 pps - tx-size: 2048
       - 5353438 pps - tx-size: 4096
      
      Notice after commit 6f25cd47 (pktgen: fix xmit test for BQL enabled
      devices) pktgen uses netif_xmit_frozen_or_drv_stopped() and ignores
      the BQL "stack" pause (QUEUE_STATE_STACK_XOFF) flag.  This allow us to put
      more pressure on the TX ring buffers.
      
      It is the ixgbe_maybe_stop_tx() call that stops the transmits, and
      pktgen respecting this in the call to netif_xmit_frozen_or_drv_stopped(txq).
      Signed-off-by: NJesper Dangaard Brouer <brouer@redhat.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      9ceb87fc
    • B
      ipv6: Allow accepting RA from local IP addresses. · d9333196
      Ben Greear 提交于
      This can be used in virtual networking applications, and
      may have other uses as well.  The option is disabled by
      default.
      
      A specific use case is setting up virtual routers, bridges, and
      hosts on a single OS without the use of network namespaces or
      virtual machines.  With proper use of ip rules, routing tables,
      veth interface pairs and/or other virtual interfaces,
      and applications that can bind to interfaces and/or IP addresses,
      it is possibly to create one or more virtual routers with multiple
      hosts attached.  The host interfaces can act as IPv6 systems,
      with radvd running on the ports in the virtual routers.  With the
      option provided in this patch enabled, those hosts can now properly
      obtain IPv6 addresses from the radvd.
      Signed-off-by: NBen Greear <greearb@candelatech.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      d9333196
  3. 12 6月, 2014 2 次提交
  4. 11 6月, 2014 1 次提交
    • A
      net: filter: cleanup A/X name usage · e430f34e
      Alexei Starovoitov 提交于
      The macro 'A' used in internal BPF interpreter:
       #define A regs[insn->a_reg]
      was easily confused with the name of classic BPF register 'A', since
      'A' would mean two different things depending on context.
      
      This patch is trying to clean up the naming and clarify its usage in the
      following way:
      
      - A and X are names of two classic BPF registers
      
      - BPF_REG_A denotes internal BPF register R0 used to map classic register A
        in internal BPF programs generated from classic
      
      - BPF_REG_X denotes internal BPF register R7 used to map classic register X
        in internal BPF programs generated from classic
      
      - internal BPF instruction format:
      struct sock_filter_int {
              __u8    code;           /* opcode */
              __u8    dst_reg:4;      /* dest register */
              __u8    src_reg:4;      /* source register */
              __s16   off;            /* signed offset */
              __s32   imm;            /* signed immediate constant */
      };
      
      - BPF_X/BPF_K is 1 bit used to encode source operand of instruction
      In classic:
        BPF_X - means use register X as source operand
        BPF_K - means use 32-bit immediate as source operand
      In internal:
        BPF_X - means use 'src_reg' register as source operand
        BPF_K - means use 32-bit immediate as source operand
      Suggested-by: NChema Gonzalez <chema@google.com>
      Signed-off-by: NAlexei Starovoitov <ast@plumgrid.com>
      Acked-by: NDaniel Borkmann <dborkman@redhat.com>
      Acked-by: NChema Gonzalez <chema@google.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      e430f34e
  5. 24 5月, 2014 1 次提交
  6. 23 5月, 2014 1 次提交
  7. 19 5月, 2014 1 次提交
  8. 14 5月, 2014 1 次提交
  9. 05 5月, 2014 2 次提交
  10. 25 4月, 2014 2 次提交
    • M
      bonding: Add tlb_dynamic_lb parameter for tlb mode · e9f0fb88
      Mahesh Bandewar 提交于
      The aggresive load balancing causes packet re-ordering as active
      flows are moved from a slave to another within the group. Sometime
      this aggresive lb is not necessary if the preference is for less
      re-ordering. This parameter if used with value "0" disables
      this dynamic flow shuffling minimizing packet re-ordering. Of course
      the side effect is that it has to live with the static load balancing
      that the hashing distribution provides. This impact is less severe if
      the correct xmit-hashing-policy is used for the tlb setup.
      
      The default value of the parameter is set to "1" mimicing the earlier
      behavior.
      
      Ran the netperf test with 200 stream for 1 min between two hosts with
      4x1G trunk (xmit-lb mode with xmit-policy L3+4) before and after these
      changes. Following was the command used for those 200 instances -
      
          netperf -t TCP_RR -l 60 -s 5 -H <host> -- -r81920,81920
      
      Transactions per second:
          Before change: 1,367.11
          After  change: 1,470.65
      
      Change-Id: Ie3f75c77282cf602e83a6e833c6eb164e72a0990
      Signed-off-by: NMahesh Bandewar <maheshb@google.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      e9f0fb88
    • M
      bonding: Added bond_tlb_xmit() for tlb mode. · f05b42ea
      Mahesh Bandewar 提交于
      Re-organized the xmit function for the lb mode separating tlb xmit
      from the alb mode. This will enable use of the hashing policies
      like 802.3ad mode. Also extended use of xmit-hash-policy to tlb mode.
      
      Now the tlb-mode defaults to BOND_XMIT_POLICY_LAYER2 if the xmit policy
      module parameter is not set (just like 802.3ad, or Xor mode).
      
      Change-Id: I140257403d272df75f477b380207338d0f04963e
      Signed-off-by: NMahesh Bandewar <maheshb@google.com>
      Acked-by: NEric Dumazet <edumazet@google.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      f05b42ea
  11. 24 4月, 2014 1 次提交
  12. 23 4月, 2014 1 次提交
  13. 01 4月, 2014 1 次提交
  14. 31 3月, 2014 1 次提交
  15. 28 3月, 2014 1 次提交
  16. 21 3月, 2014 2 次提交
  17. 19 3月, 2014 2 次提交
  18. 18 3月, 2014 1 次提交
  19. 13 3月, 2014 1 次提交
  20. 07 3月, 2014 1 次提交
  21. 03 3月, 2014 1 次提交
    • O
      can: remove CAN FD compatibility for CAN 2.0 sockets · 821047c4
      Oliver Hartkopp 提交于
      In commit e2d265d3 (canfd: add support for CAN FD in CAN_RAW sockets)
      CAN FD frames with a payload length up to 8 byte are passed to legacy
      sockets where the CAN FD support was not enabled by the application.
      
      After some discussions with developers at a fair this well meant feature
      leads to confusion as no clean switch for CAN / CAN FD is provided to the
      application programmer. Additionally a compatibility like this for legacy
      CAN_RAW sockets requires some compatibility handling for the sending, e.g.
      make CAN2.0 frames a CAN FD frame with BRS at transmission time (?!?).
      
      This will become a mess when people start to develop applications with
      real CAN FD hardware. This patch reverts the bad compatibility code
      together with the documentation describing the removed feature.
      Acked-by: NStephane Grosjean <s.grosjean@peak-system.com>
      Signed-off-by: NOliver Hartkopp <socketcan@hartkopp.net>
      Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>
      821047c4
  22. 27 2月, 2014 2 次提交
  23. 25 2月, 2014 1 次提交
  24. 19 2月, 2014 3 次提交
  25. 18 2月, 2014 1 次提交
  26. 14 2月, 2014 2 次提交
  27. 11 2月, 2014 1 次提交
    • H
      Documentation/: update 00-INDEX files · 3cf8ca1c
      Henrik Austad 提交于
      Some of the 00-INDEX files are somewhat outdated and some folders does
      not contain 00-INDEX at all.  Only outdated (with the notably exception
      of spi) indexes are touched here, the 169 folders without 00-INDEX has
      not been touched.
      
      New 00-INDEX
       - spi/* was added in a series of commits dating back to 2006
      
      Added files (missing in (*/)00-INDEX)
       - dmatest.txt was added by commit 851b7e16 ("dmatest: run test via
         debugfs")
       - this_cpu_ops.txt was added by commit a1b2a555 ("percpu: add
         documentation on this_cpu operations")
       - ww-mutex-design.txt was added by commit 040a0a37 ("mutex: Add
         support for wound/wait style locks")
       - bcache.txt was added by commit cafe5635 ("bcache: A block layer
         cache")
       - kernel-per-CPU-kthreads.txt was added by commit 49717cb4
         ("kthread: Document ways of reducing OS jitter due to per-CPU
         kthreads")
       - phy.txt was added by commit ff764963 ("drivers: phy: add generic
         PHY framework")
       - block/null_blk was added by commit 12f8f4fc ("null_blk:
         documentation")
       - module-signing.txt was added by commit 3cafea30 ("Add
         Documentation/module-signing.txt file")
       - assoc_array.txt was added by commit 3cb98950 ("Add a generic
         associative array implementation.")
       - arm/IXP4xx was part of the initial repo
       - arm/cluster-pm-race-avoidance.txt was added by commit 7fe31d28
         ("ARM: mcpm: introduce helpers for platform coherency exit/setup")
       - arm/firmware.txt was added by commit 7366b92a ("ARM: Add
         interface for registering and calling firmware-specific operations")
       - arm/kernel_mode_neon.txt was added by commit 2afd0a05 ("ARM:
         7825/1: document the use of NEON in kernel mode")
       - arm/tcm.txt was added by commit bc581770 ("ARM: 5580/2: ARM TCM
         (Tightly-Coupled Memory) support v3")
       - arm/vlocks.txt was added by commit 9762f12d ("ARM: mcpm: Add
         baremetal voting mutexes")
       - blackfin/gptimers-example.c, Makefile was added by commit
         4b60779d ("Blackfin: add an example showing how to use the
         gptimers API")
       - devicetree/usage-model.txt was added by commit 31134efc ("dt:
         Linux DT usage model documentation")
       - fb/api.txt was added by commit fb21c2f4 ("fbdev: Add FOURCC-based
         format configuration API")
       - fb/sm501.txt was added by commit e6a04980 ("video, sm501: add
         edid and commandline support")
       - fb/udlfb.txt was added by commit 96f8d864 ("fbdev: move udlfb out
         of staging.")
       - filesystems/Makefile was added by commit 1e0051ae
         ("Documentation/fs/: split txt and source files")
       - filesystems/nfs/nfsd-admin-interfaces.txt was added by commit
         8a4c6e19 ("nfsd: document kernel interfaces for nfsd
         configuration")
       - ide/warm-plug-howto.txt was added by commit f74c9141 ("ide: add
         warm-plug support for IDE devices (take 2)")
       - laptops/Makefile was added by commit d49129ac
         ("Documentation/laptop/: split txt and source files")
       - leds/leds-blinkm.txt was added by commit b54cf35a ("LEDS: add
         BlinkM RGB LED driver, documentation and update MAINTAINERS")
       - leds/ledtrig-oneshot.txt was added by commit 5e417281 ("leds: add
         oneshot trigger")
       - leds/ledtrig-transient.txt was added by commit 44e1e9f8 ("leds:
         add new transient trigger for one shot timer activation")
       - m68k/README.buddha was part of the initial repo
       - networking/LICENSE.(qla3xxx|qlcnic|qlge) was added by commits
         40839129, c4e84bde, 5a4faa87
       - networking/Makefile was added by commit 3794f3e8 ("docsrc: build
         Documentation/ sources")
       - networking/i40evf.txt was added by commit 105bf2fe ("i40evf: add
         driver to kernel build system")
       - networking/ipsec.txt was added by commit b3c6efbc ("xfrm: Add
         file to document IPsec corner case")
       - networking/mac80211-auth-assoc-deauth.txt was added by commit
         3cd7920a ("mac80211: add auth/assoc/deauth flow diagram")
       - networking/netlink_mmap.txt was added by commit 5683264c
         ("netlink: add documentation for memory mapped I/O")
       - networking/nf_conntrack-sysctl.txt was added by commit c9f9e0e1
         ("netfilter: doc: add nf_conntrack sysctl api documentation") lan)
       - networking/team.txt was added by commit 3d249d4c ("net: introduce
         ethernet teaming device")
       - networking/vxlan.txt was added by commit d342894c ("vxlan:
         virtual extensible lan")
       - power/runtime_pm.txt was added by commit 5e928f77 ("PM: Introduce
         core framework for run-time PM of I/O devices (rev.  17)")
       - power/charger-manager.txt was added by commit 3bb3dbbd
         ("power_supply: Add initial Charger-Manager driver")
       - RCU/lockdep-splat.txt was added by commit d7bd2d68 ("rcu:
         Document interpretation of RCU-lockdep splats")
       - s390/kvm.txt was added by 5ecee4ba (KVM: s390: API documentation)
       - s390/qeth.txt was added by commit b4d72c08 ("qeth: bridgeport
         support - basic control")
       - scheduler/sched-bwc.txt was added by commit 88ebc08e ("sched: Add
         documentation for bandwidth control")
       - scsi/advansys.txt was added by commit 4bd6d7f3 ("[SCSI] advansys:
         Move documentation to Documentation/scsi")
       - scsi/bfa.txt was added by commit 1ec90174 ("[SCSI] bfa: add
         readme file")
       - scsi/bnx2fc.txt was added by commit 12b8fc10 ("[SCSI] bnx2fc: Add
         driver documentation")
       - scsi/cxgb3i.txt was added by commit c3673464 ("[SCSI] cxgb3i: Add
         cxgb3i iSCSI driver.")
       - scsi/hpsa.txt was added by commit 992ebcf1 ("[SCSI] hpsa: Add
         hpsa.txt to Documentation/scsi")
       - scsi/link_power_management_policy.txt was added by commit
         ca77329f ("[libata] Link power management infrastructure")
       - scsi/osd.txt was added by commit 78e0c621 ("[SCSI] osd:
         Documentation for OSD library")
       - scsi/scsi-parameter.txt was created/moved by commit 163475fb
         ("Documentation: move SCSI parameters to their own text file")
       - serial/driver was part of the initial repo
       - serial/n_gsm.txt was added by commit 323e8412 ("n_gsm: add a
         documentation")
       - timers/Makefile was added by commit 3794f3e8 ("docsrc: build
         Documentation/ sources")
       - virt/kvm/s390.txt was added by commit d9101fca ("KVM: s390:
         diagnose call documentation")
       - vm/split_page_table_lock was added by commit 49076ec2 ("mm:
         dynamically allocate page->ptl if it cannot be embedded to struct
         page")
       - w1/slaves/w1_ds28e04 was added by commit fbf7f7b4 ("w1: Add
         1-wire slave device driver for DS28E04-100")
       - w1/masters/omap-hdq was added by commit e0a29382 ("hdq:
         documentation for OMAP HDQ")
       - x86/early-microcode.txt was added by commit 0d91ea86 ("x86, doc:
         Documentation for early microcode loading")
       - x86/earlyprintk.txt was added by commit a1aade47 ("x86/doc:
         mini-howto for using earlyprintk=dbgp")
       - x86/entry_64.txt was added by commit 8b4777a4 ("x86-64: Document
         some of entry_64.S")
       - x86/pat.txt was added by commit d27554d8 ("x86: PAT
         documentation")
      
      Moved files
       - arm/kernel_user_helpers.txt was moved out of arch/arm/kernel by
         commit 37b83046 ("ARM: kuser: move interface documentation out of
         the source code")
       - efi-stub.txt was moved out of x86/ and down into Documentation/ in
         commit 4172fe2f ("EFI stub documentation updates")
       - laptops/hpfall.c was moved out of hwmon/ and into laptops/ in commit
         efcfed9b ("Move hp_accel to drivers/platform/x86")
       - commit 5616c23a ("x86: doc: move x86-generic documentation from
         Doc/x86/i386"):
         * x86/usb-legacy-support.txt
         * x86/boot.txt
         * x86/zero_page.txt
       - power/video_extension.txt was moved to acpi in commit 70e66e4d
         ("ACPI / video: move video_extension.txt to Documentation/acpi")
      
      Removed files (left in 00-INDEX)
       - memory.txt was removed by commit 00ea8990 ("memory.txt: remove
         stray information")
       - gpio.txt was moved to gpio/ in commit fd8e198c ("Documentation:
         gpiolib: document new interface")
       - networking/DLINK.txt was removed by commit 168e06ae
         ("drivers/net: delete old parallel port de600/de620 drivers")
       - serial/hayes-esp.txt was removed by commit f53a2ade ("tty: esp:
         remove broken driver")
       - s390/TAPE was removed by commit 9e280f66 ("[S390] remove tape
         block docu")
       - vm/locking was removed by commit 57ea8171 ("mm: documentation:
         remove hopelessly out-of-date locking doc")
       - laptops/acer-wmi.txt was remvoed by commit 02003667 ("acer-wmi:
         Delete out-of-date documentation")
      
      Typos/misc issues
       - rpc-server-gss.txt was added as knfsd-rpcgss.txt in commit
         030d794b ("SUNRPC: Use gssproxy upcall for server RPCGSS
         authentication.")
       - commit b88cf73d ("net: add missing entries to
         Documentation/networking/00-INDEX")
         * generic-hdlc.txt was added as generic_hdlc.txt
         * spider_net.txt was added as spider-net.txt
       - w1/master/mxc-w1 was added as mxc_w1 by commit a5fd9139 ("w1: add
         1-wire master driver for i.MX27 / i.MX31")
       - s390/zfcpdump.txt was added as zfcpdump by commit 6920c12a
         ("[S390] Add Documentation/s390/00-INDEX.")
      Signed-off-by: NHenrik Austad <henrik@austad.us>
      Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>	[rcu bits]
      Acked-by: NRob Landley <rob@landley.net>
      Cc: Jiri Kosina <jkosina@suse.cz>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Rob Herring <robh+dt@kernel.org>
      Cc: David S. Miller <davem@davemloft.net>
      Cc: Mark Brown <broonie@kernel.org>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Gleb Natapov <gleb@kernel.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Len Brown <len.brown@intel.com>
      Cc: James Bottomley <JBottomley@parallels.com>
      Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      3cf8ca1c
  28. 28 1月, 2014 2 次提交
  29. 23 1月, 2014 1 次提交