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2015-08-31drm/radeon/native: Send out the full AUX addressAlex Deucher
AUX addresses are 20 bits long. Send out the entire address instead of just the low 16 bits. Port of: drm/radeon/atom: Send out the full AUX address to radeon non-atom aux path Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
2015-08-31drm/radeon/atom: Send out the full AUX addressVille Syrjälä
AUX addresses are 20 bits long. Send out the entire address instead of just the low 16 bits. Cc: Alex Deucher <alexander.deucher@amd.com> Cc: "Christian König" <christian.koenig@amd.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
2015-08-31drm/i915: eDP can be present on DDI-ERodrigo Vivi
Enable eDP on DDI-E. Also let's remove duplicated definitions to avoid later confusion. Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Reviewed-by: Xiong Zhang <xiong.y.zhang@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2015-08-31Merge tag 'char-misc-4.3-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc driver patches from Greg KH: "Here's the "big" char/misc driver update for 4.3-rc1. Not much really interesting here, just a number of little changes all over the place, and some nice consolidation of the nvmem drivers to a common framework. As usual, the mei drivers stand out as the largest "churn" to handle new devices and features in their hardware. All have been in linux-next for a while with no issues" * tag 'char-misc-4.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (136 commits) auxdisplay: ks0108: initialize local parport variable extcon: palmas: Fix build break due to devm_gpiod_get_optional API change extcon: palmas: Support GPIO based USB ID detection extcon: Fix signedness bugs about break error handling extcon: Drop owner assignment from i2c_driver extcon: arizona: Simplify pdata symantics for micd_dbtime extcon: arizona: Declare 3-pole jack if we detect open circuit on mic extcon: Add exception handling to prevent the NULL pointer access extcon: arizona: Ensure variables are set for headphone detection extcon: arizona: Use gpiod inteface to handle micd_pol_gpio gpio extcon: arizona: Add basic microphone detection DT/ACPI bindings extcon: arizona: Update to use the new device properties API extcon: palmas: Remove the mutually_exclusive array extcon: Remove optional print_state() function pointer of struct extcon_dev extcon: Remove duplicate header file in extcon.h extcon: max77843: Clear IRQ bits state before request IRQ toshiba laptop: replace ioremap_cache with ioremap misc: eeprom: max6875: clean up max6875_read() misc: eeprom: clean up eeprom_read() misc: eeprom: 93xx46: clean up eeprom_93xx46_bin_read/write ...
2015-08-31drm/i915/skl: Enable DDI-ERodrigo Vivi
There are OEMs using DDI-E out there, so let's enable it. Unfortunately there is no detection bit for DDI-E So we need to rely on VBT for that. I also need to give credits to Xiong since before seing his approach to check info->support_* I was creating an ugly vbt->ddie_sfuse_strap in order to propagate the ddi presence info v2: Rebased as last patch in the series. since all other patches in this series are needed for anything working propperly on DDI-E. Credits-to: "Zhang, Xiong Y" <xiong.y.zhang@intel.com> Cc: "Zhang, Xiong Y" <xiong.y.zhang@intel.com> Reviewed-by: Xiong Zhang <xiong.y.zhang@intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2015-08-31Merge tag 'kvm-4.3-1' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull kvm updates from Paolo Bonzini: "A very small release for x86 and s390 KVM. - s390: timekeeping changes, cleanups and fixes - x86: support for Hyper-V MSRs to report crashes, and a bunch of cleanups. One interesting feature that was planned for 4.3 (emulating the local APIC in kernel while keeping the IOAPIC and 8254 in userspace) had to be delayed because Intel complained about my reading of the manual" * tag 'kvm-4.3-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (42 commits) x86/kvm: Rename VMX's segment access rights defines KVM: x86/vPMU: Fix unnecessary signed extension for AMD PERFCTRn kvm: x86: Fix error handling in the function kvm_lapic_sync_from_vapic KVM: s390: Fix assumption that kvm_set_irq_routing is always run successfully KVM: VMX: drop ept misconfig check KVM: MMU: fully check zero bits for sptes KVM: MMU: introduce is_shadow_zero_bits_set() KVM: MMU: introduce the framework to check zero bits on sptes KVM: MMU: split reset_rsvds_bits_mask_ept KVM: MMU: split reset_rsvds_bits_mask KVM: MMU: introduce rsvd_bits_validate KVM: MMU: move FNAME(is_rsvd_bits_set) to mmu.c KVM: MMU: fix validation of mmio page fault KVM: MTRR: Use default type for non-MTRR-covered gfn before WARN_ON KVM: s390: host STP toleration for VMs KVM: x86: clean/fix memory barriers in irqchip_in_kernel KVM: document memory barriers for kvm->vcpus/kvm->online_vcpus KVM: x86: remove unnecessary memory barriers for shared MSRs KVM: move code related to KVM_SET_BOOT_CPU_ID to x86 KVM: s390: log capability enablement and vm attribute changes ...
2015-08-31drm/i915: Enable HDMI on DDI-EXiong Zhang
DDI-E doesn't have the correspondent GMBUS pin. We rely on VBT to tell us which one it being used instead. The DVI/HDMI on shared port couldn't exist. This patch isn't tested without hardware wchich has HDMI on DDI-E. v2: fix trailing whitespace v3: MISSING_CASE take place of BUG() Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2015-08-31drm/i915: apply the PCI_D0/D3 hibernation workaround everywhere on pre GEN6Imre Deak
commit da2bc1b9db3351addd293e5b82757efe1f77ed1d Author: Imre Deak <imre.deak@intel.com> Date: Thu Oct 23 19:23:26 2014 +0300 drm/i915: add poweroff_late handler introduced a regression on old platforms during hibernation. A workaround was added in commit ab3be73fa7b43f4c3648ce29b5fd649ea54d3adb Author: Imre Deak <imre.deak@intel.com> Date: Mon Mar 2 13:04:41 2015 +0200 drm/i915: gen4: work around hang during hibernation using an explicit blacklist for the GENs/BIOS vendors where the issue was reported. Later there we had reports of the same failure on platforms not on this list. To my best knowledge the correct thing to do is still to put the device to PCI D3 state during hibernation, see [1] and [2] for the reasons. This also aligns with our future plans to unify more the runtime and system suspend/resume paths. Since an exact blacklist seems to be impractical (multiple GENs and BIOS vendors are affected) apply the workaround on everything pre GEN6. [1] http://lists.freedesktop.org/archives/intel-gfx/2015-February/060710.html [2] https://lkml.org/lkml/2015/6/22/274 Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=95061 Reported-by: Ilya Tumaykin <itumaykin@gmail.com> Reported-by: Dirk Griesbach <spamthis@freenet.de> Reported-by: Pavel Machek <pavel@ucw.cz> Reported-by: Mikko Rapeli <mikko.rapeli@iki.fi> Tested-by: Mikko Rapeli <mikko.rapeli@iki.fi> Reported-by: Paul Bolle <pebolle@tiscali.nl> CC: stable@vger.kernel.org Signed-off-by: Imre Deak <imre.deak@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2015-08-31drm/i915: Check DP link status on long hpd tooVille Syrjälä
We are no longer checkling the DP link status on long hpd. We used to do that from the .hot_plug() handler, but it was removed when MST got introduced. If there's no userspace we now fail to retrain the link if the sink power is toggled (or cable yanked and replugged), meaning the user is left staring at a blank screen. With the retraining put back that should be fixed. Also remove the leftover comment that referred to the old retraining from .hot_plug(). Fixes a regression introduced in: commit 0e32b39ceed665bfa4a77a4bc307b6652b991632 Author: Dave Airlie <airlied@redhat.com> Date: Fri May 2 14:02:48 2014 +1000 drm/i915: add DP 1.2 MST support (v0.7) Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89453 Tested-by: Palmer Dabbelt <palmer@dabbelt.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91407 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89461 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89594 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=85641 Cc: Dave Airlie <airlied@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2015-08-31tracing: Don't make assumptions about length of string on task renameSasha Levin
While the dest comm string size is assured to be at least TASK_COMM_LEN long, doing a memcpy() also adds the assumption that the source is at least that long as well, which isn't assured, and isn't true in cases such as: set_task_comm(worker->task, "kworker/dying"); This leads to accessing invalid memory. Link: http://lkml.kernel.org/r/1440760018-1557-1-git-send-email-sasha.levin@oracle.com Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2015-08-31Merge tag 'asoc-v4.2-rc8' of ↵Takashi Iwai
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus ASoC: Updates for v4.3 Not many updates to the core here, but an awful lot of driver updates this time round: - Factoring out of AC'97 reset code into the core - New drivers for Cirrus CS4349, GTM601, InvenSense ICS43432, Realtek RT298 and ST STI controllers. - Machine drivers for Rockchip systems with MAX98090 and RT5645 and RT5650. - Initial driver support for Intel Skylake devices. - A large number of cleanups for Lars-Peter Clausen and Axel Lin.
2015-08-31Merge remote-tracking branches 'spi/topic/ti-qspi', 'spi/topic/xcomm' and ↵Mark Brown
'spi/topic/xlp' into spi-next
2015-08-31Merge remote-tracking branches 'spi/topic/s3c64xx', 'spi/topic/sg', ↵Mark Brown
'spi/topic/sh-msiof', 'spi/topic/spidev' and 'spi/topic/stats' into spi-next
2015-08-31Merge remote-tracking branches 'spi/topic/mtk', 'spi/topic/pxa2xx', ↵Mark Brown
'spi/topic/qspi', 'spi/topic/rockchip' and 'spi/topic/s3c24xx' into spi-next
2015-08-31Merge remote-tracking branches 'spi/topic/dw', 'spi/topic/fsl-espi', ↵Mark Brown
'spi/topic/img-spfi' and 'spi/topic/mpc512x-psc' into spi-next
2015-08-31Merge remote-tracking branches 'spi/topic/atmel', 'spi/topic/bcm2835', ↵Mark Brown
'spi/topic/bcm63xx-hsspi' and 'spi/topic/davinci' into spi-next
2015-08-31Merge remote-tracking branch 'spi/topic/dma' into spi-nextMark Brown
2015-08-31Merge remote-tracking branch 'spi/topic/core' into spi-nextMark Brown
2015-08-31Merge remote-tracking branches 'spi/fix/bcm2835', 'spi/fix/bitbang', ↵Mark Brown
'spi/fix/img-spfi', 'spi/fix/omap2-mcspi', 'spi/fix/orion' and 'spi/fix/xilinx' into spi-linus
2015-08-31spi: sh-msiof: Fix FIFO size to 64 word from 256 wordKoji Matsuoka
The upper limit of Tx/Rx FIFO size is 64 word by the specification of H/W. This patch corrects to 64 word from 256 word. Signed-off-by: Koji Matsuoka <koji.matsuoka.xm@renesas.com> Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
2015-08-31NFSv4.1/pNFS: Don't request a minimal read layout beyond the end of fileTrond Myklebust
If we have a read layout, then sanity check the minimal layout length so that it does not extend beyond the end of file. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2015-08-31NFSv4.1/pnfs: Handle LAYOUTGET return values correctlyTrond Myklebust
According to RFC5661 section 18.43.3, if the server cannot satisfy the loga_minlength argument to LAYOUTGET, there are 2 cases: 1) If loga_minlength == 0, it returns NFS4ERR_LAYOUTTRYLATER 2) If loga_minlength != 0, it returns NFS4ERR_BADLAYOUT Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2015-08-31NFSv4.1/pnfs: Don't ask for a read layout for an empty file.Trond Myklebust
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2015-08-31Merge tag 'perf-core-for-mingo' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvement and fixes from Arnaldo Carvalho de Melo: User visible changes: - Add new compaction-times python script. (Tony Jones) - Make the --[no-]-demangle/--[no-]-demangle-kernel command line options available in 'perf script' too. (Mark Drayton) - Allow for negative numbers in libtraceevent's print format, fixing up misformatting in some tracepoints. (Steven Rostedt) Infrastructure changes: - perf_env/perf_evlist changes to allow accessing the data structure with the environment where some perf data was collected in functions not necessarily related to perf.data file processing. (Kan Liang) - Cleanups for the tracepoint definition location paths routines. (Jiri Olsa) - Introduce sysfs/filename__sprintf_build_id, removing code duplication. (Masami Hiramatsu) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-08-31Merge branch 'perf/urgent' into perf/core, to pick up fixesIngo Molnar
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-08-31Merge tag 'perf-urgent-for-mingo' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent Pull perf/urgent fix from Arnaldo Carvalho de Melo: - Use index, not CPU id, to find core/pkg id in 'perf stat' (Kan Liang) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-08-31Revert "gpio: extraxfs: fix returnvar.cocci warnings"Linus Walleij
This reverts commit 5e22ec019823b0204720e1ad9a5866c638332b3a.
2015-08-30ipv4: Fix 32-bit build.David S. Miller
net/ipv4/af_inet.c: In function 'snmp_get_cpu_field64': >> net/ipv4/af_inet.c:1486:26: error: 'offt' undeclared (first use in this function) v = *(((u64 *)bhptr) + offt); ^ net/ipv4/af_inet.c:1486:26: note: each undeclared identifier is reported only once for each function it appears in net/ipv4/af_inet.c: In function 'snmp_fold_field64': >> net/ipv4/af_inet.c:1499:39: error: 'offct' undeclared (first use in this function) res += snmp_get_cpu_field(mib, cpu, offct, syncp_offset); ^ >> net/ipv4/af_inet.c:1499:10: error: too many arguments to function 'snmp_get_cpu_field' res += snmp_get_cpu_field(mib, cpu, offct, syncp_offset); ^ net/ipv4/af_inet.c:1455:5: note: declared here u64 snmp_get_cpu_field(void __percpu *mib, int cpu, int offt) ^ Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-30netlink: rx mmap: fix POLLIN conditionKen-ichirou MATSUZAWA
Poll() returns immediately after setting the kernel current frame (ring->head) to SKIP from user space even though there is no new frame. And in a case of all frames is VALID, user space program unintensionally sets (only) kernel current frame to UNUSED, then calls poll(), it will not return immediately even though there are VALID frames. To avoid situations like above, I think we need to scan all frames to find VALID frames at poll() like netlink_alloc_skb(), netlink_forward_ring() finding an UNUSED frame at skb allocation. Signed-off-by: Ken-ichirou MATSUZAWA <chamas@h4.dion.ne.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-30Merge branch 'thunderx-features-fixes'David S. Miller
Aleksey Makarov says: ==================== net: thunderx: New features and fixes v2: - The unused affinity_mask field of the structure cmp_queue has been deleted. (thanks to David Miller) - The unneeded initializers have been dropped. (thanks to Alexey Klimov) - The commit message "net: thunderx: Rework interrupt handling" has been fixed. (thanks to Alexey Klimov) ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-30net: thunderx: Support for internal loopback modeSunil Goutham
Support for setting VF's corresponding BGX LMAC in internal loopback mode. This mode can be used for verifying basic HW functionality such as packet I/O, RX checksum validation, CQ/RBDR interrupts, stats e.t.c. Useful when DUT has no external network connectivity. 'loopback' mode can be enabled or disabled via ethtool. Note: This feature is not supported when no of VFs enabled are morethan no of physical interfaces i.e active BGX LMACs Signed-off-by: Sunil Goutham <sgoutham@cavium.com> Signed-off-by: Aleksey Makarov <aleksey.makarov@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-30net: thunderx: Support for upto 96 queues for a VFSunil Goutham
This patch adds support for handling multiple qsets assigned to a single VF. There by increasing no of queues from earlier 8 to max no of CPUs in the system i.e 48 queues on a single node and 96 on dual node system. User doesn't have option to assign which Qsets/VFs to be merged. Upon request from VF, PF assigns next free Qsets as secondary qsets. To maintain current behavior no of queues is kept to 8 by default which can be increased via ethtool. If user wants to unbind NICVF driver from a secondary Qset then it should be done after tearing down primary VF's interface. Signed-off-by: Sunil Goutham <sgoutham@cavium.com> Signed-off-by: Aleksey Makarov <aleksey.makarov@caviumnetworks.com> Signed-off-by: Robert Richter <rrichter@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-30net: thunderx: Rework interrupt handlingSunil Goutham
Rework interrupt handler to avoid checking IRQ affinity of CQ interrupts. Now separate handlers are registered for each IRQ including RBDR. Register interrupt handlers for only those which are being used. Add nicvf_dump_intr_status() and use it in irq handlers. Signed-off-by: Sunil Goutham <sgoutham@cavium.com> Signed-off-by: Aleksey Makarov <aleksey.makarov@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-30net: thunderx: Support for HW VLAN strippingSunil Goutham
This patch configures HW to strip 802.1Q header if found in a receiving packet. The stripped VLAN ID and TCI information is passed on to software via CQE_RX. Also sets netdev's 'vlan_features' so that other HW offload features can be used for tagged packets. This offload feature can be enabled or disabled via ethtool. Network stack normally ignores RPS for 802.1Q packets and hence low throughput. With this offload enabled throughput for tagged packets will be almost same as normal packets. Note: This patch doesn't enable HW VLAN insertion for transmit packets. Signed-off-by: Sunil Goutham <sgoutham@cavium.com> Signed-off-by: Aleksey Makarov <aleksey.makarov@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-30net: thunderx: Receive hashing HW offload supportSunil Goutham
Adding support for receive hashing HW offload by using RSS_ALG and RSS_TAG fields of CQE_RX descriptor. Also removed dependency on minimum receive queue count to configure RSS so that hash is always generated. This hash is used by RPS logic to distribute flows across multiple CPUs. Offload can be disabled via ethtool. Signed-off-by: Robert Richter <rrichter@cavium.com> Signed-off-by: Sunil Goutham <sgoutham@cavium.com> Signed-off-by: Aleksey Makarov <aleksey.makarov@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-30net: thunderx: mailboxes: remove code duplicationSunil Goutham
Use the nicvf_send_msg_to_pf() function in the mailbox code. Signed-off-by: Sunil Goutham <sgoutham@cavium.com> Signed-off-by: Robert Richter <rrichter@cavium.com> Signed-off-by: Aleksey Makarov <aleksey.makarov@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-30net: thunderx: Add receive error stats reporting via ethtoolSunil Goutham
Added ethtool support to dump receive packet error statistics reported in CQE. Also made some small fixes Signed-off-by: Sunil Goutham <sgoutham@cavium.com> Signed-off-by: Aleksey Makarov <aleksey.makarov@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-30net: thunderx: fix MAINTAINERSAleksey Makarov
The liquidio and thunder drivers have different maintainers. Signed-off-by: Aleksey Makarov <aleksey.makarov@caviumnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-30Merge branch 'snmp-stat-aggregation'David S. Miller
Raghavendra K T says: ==================== Optimize the snmp stat aggregation for large cpus While creating 1000 containers, perf is showing lot of time spent in snmp_fold_field on a large cpu system. The current patch tries to improve by reordering the statistics gathering. Please note that similar overhead was also reported while creating veth pairs https://lkml.org/lkml/2013/3/19/556 Changes in V4: - remove 'item' variable and use IPSTATS_MIB_MAX to avoid sparse warning (Eric) also remove 'item' parameter (Joe) - add missing memset of padding. Changes in V3: - use memset to initialize temp buffer in leaf function. (David) - use memcpy to copy the buffer data to stat instead of unalign_pu (Joe) - Move buffer definition to leaf function __snmp6_fill_stats64() (Eric) - Changes in V2: - Allocate the stat calculation buffer in stack. (Eric) Setup: 160 cpu (20 core) baremetal powerpc system with 1TB memory 1000 docker containers was created with command docker run -itd ubuntu:15.04 /bin/bash in loop observation: Docker container creation linearly increased from around 1.6 sec to 7.5 sec (at 1000 containers) perf data showed, creating veth interfaces resulting in the below code path was taking more time. rtnl_fill_ifinfo -> inet6_fill_link_af -> inet6_fill_ifla6_attrs -> snmp_fold_field proposed idea: currently __snmp6_fill_stats64 calls snmp_fold_field that walks through per cpu data to of an item (iteratively for around 36 items). The patch tries to aggregate the statistics by going through all the items of each cpu sequentially which is reducing cache misses. Performance of docker creation improved by around more than 2x after the patch. before the patch: ================ 3f45ba571a42e925c4ec4aaee0e48d7610a9ed82a4c931f83324d41822cf6617 real 0m6.836s user 0m0.095s sys 0m0.011s perf record -a docker run -itd ubuntu:15.04 /bin/bash ======================================================= 50.73% docker [kernel.kallsyms] [k] snmp_fold_field 9.07% swapper [kernel.kallsyms] [k] snooze_loop 3.49% docker [kernel.kallsyms] [k] veth_stats_one 2.85% swapper [kernel.kallsyms] [k] _raw_spin_lock 1.37% docker docker [.] backtrace_qsort 1.31% docker docker [.] strings.FieldsFunc cache-misses: 2.7% after the patch: ============= 9178273e9df399c8290b6c196e4aef9273be2876225f63b14a60cf97eacfafb5 real 0m3.249s user 0m0.088s sys 0m0.020s perf record -a docker run -itd ubuntu:15.04 /bin/bash ======================================================= 10.57% docker docker [.] scanblock 8.37% swapper [kernel.kallsyms] [k] snooze_loop 6.91% docker [kernel.kallsyms] [k] snmp_get_cpu_field 6.67% docker [kernel.kallsyms] [k] veth_stats_one 3.96% docker docker [.] runtime_MSpan_Sweep 2.47% docker docker [.] strings.FieldsFunc cache-misses: 1.41 % Please let me know if you have suggestions/comments. Thanks Eric, Joe and David for the comments. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-30net: Optimize snmp stat aggregation by walking all the percpu data at onceRaghavendra K T
Docker container creation linearly increased from around 1.6 sec to 7.5 sec (at 1000 containers) and perf data showed 50% ovehead in snmp_fold_field. reason: currently __snmp6_fill_stats64 calls snmp_fold_field that walks through per cpu data of an item (iteratively for around 36 items). idea: This patch tries to aggregate the statistics by going through all the items of each cpu sequentially which is reducing cache misses. Docker creation got faster by more than 2x after the patch. Result: Before After Docker creation time 6.836s 3.25s cache miss 2.7% 1.41% perf before: 50.73% docker [kernel.kallsyms] [k] snmp_fold_field 9.07% swapper [kernel.kallsyms] [k] snooze_loop 3.49% docker [kernel.kallsyms] [k] veth_stats_one 2.85% swapper [kernel.kallsyms] [k] _raw_spin_lock perf after: 10.57% docker docker [.] scanblock 8.37% swapper [kernel.kallsyms] [k] snooze_loop 6.91% docker [kernel.kallsyms] [k] snmp_get_cpu_field 6.67% docker [kernel.kallsyms] [k] veth_stats_one changes/ideas suggested: Using buffer in stack (Eric), Usage of memset (David), Using memcpy in place of unaligned_put (Joe). Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-30net: Introduce helper functions to get the per cpu dataRaghavendra K T
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-08-30Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
2015-08-30NFSv4.1: Fix a protocol issue with CLOSE stateidsTrond Myklebust
According to RFC5661 Section 18.2.4, CLOSE is supposed to return the zero stateid. This means that nfs_clear_open_stateid_locked() cannot assume that the result stateid will always match the 'other' field of the existing open stateid when trying to determine a race with a parallel OPEN. Instead, we look at the argument, and check for matches. Cc: stable@vger.kernel.org # v4.0+ Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2015-08-30alpha: select CONFIG_ARCH_USE_CMPXCHG_LOCKREF.Matt Turner
On Alpha we have spinlocks that are 32b in size and an efficient cmpxchg64 implementation, so we qualify to make use of cmpxchg backed lockrefs. Select the ARCH_USE_CMPXCHG_LOCKREF Kconfig symbol and provide a trivial implementation of arch_spin_value_unlocked to satisfy the lockref code. Using Linus' simple testcase from http://article.gmane.org/gmane.linux.file-systems/77466 on a dual CPU ES47 system I see around an 8% gain: N Min Max Median Avg Stddev x 30 6194580 6295654 6272504 6272514 17694.232 + 30 6731164 6786334 6767982 6764274 13738.863 Difference at 95.0% confidence 491760 +/- 8188.17 7.83992% +/- 0.130541% (Student's t, pooled s = 15840.5) Signed-off-by: Matt Turner <mattst88@gmail.com>
2015-08-31Merge branch 'exynos-drm-next' of ↵Dave Airlie
git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-next This is a second pull-request which adds last part of atomic modeset/pageflip support, render node support, clean-up, and fix-up. * 'exynos-drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos: drm/exynos: fix build warning to exynos_drm_gem.c drm/exynos: Properly report supported formats for each device drm/exynos: add render node support drm/exynos: implement atomic_{begin/flush} of DECON drm/exynos: remove legacy ->suspend()/resume() drm/exynos: Enable atomic modesetting feature drm/exynos: remove wait queue for pending page flip drm/exynos: wait all planes updates to finish drm/exynos: add atomic asynchronous commit drm/exynos: fimd: only finish update if START == START_S drm/exynos: add macro to get the address of START_S reg drm/exynos: check for pending fb before finish update drm/exynos: fimd: move window protect code to prepare/cleanup_plane drm/exynos: add prepare and cleanup phases for planes drm/exynos: fimd: unify call to exynos_drm_crtc_finish_pageflip() drm/exynos: don't track enabled state at exynos_crtc
2015-08-31Merge tag 'drm-intel-next-fixes-2015-08-28' of ↵Dave Airlie
git://anongit.freedesktop.org/drm-intel into drm-next Some i915 fixes headed for v4.3. SKL DDI-E is a wip, but here's the first in a series. * tag 'drm-intel-next-fixes-2015-08-28' of git://anongit.freedesktop.org/drm-intel: drm/i915/skl: enable DDI-E hotplug drm/i915: Fix build warning on 32-bit drm/i915/skl: Update DDI buffer translation programming. drm/i915: Allow parsing of variable size child device entries from VBT drm/i915: fix link rates reported for SKL drm/i915: fix VBT parsing for SDVO child device mapping
2015-08-31Merge tag 'drm-amdkfd-next-fixes-2015-08-30' of ↵Dave Airlie
git://people.freedesktop.org/~gabbayo/linux into drm-next Just one small fix before 4.3 merge window: - Use linux/mman.h instead of uapi's mman-common.h inside the driver. * tag 'drm-amdkfd-next-fixes-2015-08-30' of git://people.freedesktop.org/~gabbayo/linux: amdkfd: use <linux/mman.h> instead of <uapi/asm-generic/mman-common.h>
2015-08-30NFSv4.1/flexfiles: Don't mark the entire deviceid as bad for file errorsTrond Myklebust
If the file was fenced and/or has been deleted on the DS, then we want to retry pNFS after a layoutreturn with error report. If the server cannot fix the problem, then we rely on it to tell us so in the response to the LAYOUTGET. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2015-08-30pinctrl: at91: fix null pointer dereferenceDavid Dueck
Not all gpio banks are necessarily enabled, in the current code this can lead to null pointer dereferences. [ 51.130000] Unable to handle kernel NULL pointer dereference at virtual address 00000058 [ 51.130000] pgd = dee04000 [ 51.130000] [00000058] *pgd=3f66d831, *pte=00000000, *ppte=00000000 [ 51.140000] Internal error: Oops: 17 [#1] ARM [ 51.140000] Modules linked in: [ 51.140000] CPU: 0 PID: 1664 Comm: cat Not tainted 4.1.1+ #6 [ 51.140000] Hardware name: Atmel SAMA5 [ 51.140000] task: df6dd880 ti: dec60000 task.ti: dec60000 [ 51.140000] PC is at at91_pinconf_get+0xb4/0x200 [ 51.140000] LR is at at91_pinconf_get+0xb4/0x200 [ 51.140000] pc : [<c01e71a0>] lr : [<c01e71a0>] psr: 600f0013 sp : dec61e48 ip : 600f0013 fp : df522538 [ 51.140000] r10: df52250c r9 : 00000058 r8 : 00000068 [ 51.140000] r7 : 00000000 r6 : df53c910 r5 : 00000000 r4 : dec61e7c [ 51.140000] r3 : 00000000 r2 : c06746d4 r1 : 00000000 r0 : 00000003 [ 51.140000] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 51.140000] Control: 10c53c7d Table: 3ee04059 DAC: 00000015 [ 51.140000] Process cat (pid: 1664, stack limit = 0xdec60208) [ 51.140000] Stack: (0xdec61e48 to 0xdec62000) [ 51.140000] 1e40: 00000358 00000000 df522500 ded15f80 c05a9d08 ded15f80 [ 51.140000] 1e60: 0000048c 00000061 df522500 ded15f80 c05a9d08 c01e7304 ded15f80 00000000 [ 51.140000] 1e80: c01e6008 00000060 0000048c c01e6034 c01e5f6c ded15f80 dec61ec0 00000000 [ 51.140000] 1ea0: 00020000 ded6f280 dec61f80 00000001 00000001 c00ae0b8 b6e80000 ded15fb0 [ 51.140000] 1ec0: 00000000 00000000 df4bc974 00000055 00000800 ded6f280 b6e80000 ded6f280 [ 51.140000] 1ee0: ded6f280 00020000 b6e80000 00000000 00020000 c0090dec c0671e1c dec61fb0 [ 51.140000] 1f00: b6f8b510 00000001 00004201 c000924c 00000000 00000003 00000003 00000000 [ 51.140000] 1f20: df4bc940 00022000 00000022 c066e188 b6e7f000 c00836f4 000b6e7f ded6f280 [ 51.140000] 1f40: ded6f280 b6e80000 dec61f80 ded6f280 00020000 c0091508 00000000 00000003 [ 51.140000] 1f60: 00022000 00000000 00000000 ded6f280 ded6f280 00020000 b6e80000 c0091d9c [ 51.140000] 1f80: 00000000 00000000 ffffffff 00020000 00020000 b6e80000 00000003 c000f124 [ 51.140000] 1fa0: dec60000 c000efa0 00020000 00020000 00000003 b6e80000 00020000 000271c4 [ 51.140000] 1fc0: 00020000 00020000 b6e80000 00000003 7fffe000 00000000 00000000 00020000 [ 51.140000] 1fe0: 00000000 bef50b64 00013835 b6f29c76 400f0030 00000003 00000000 00000000 [ 51.140000] [<c01e71a0>] (at91_pinconf_get) from [<c01e7304>] (at91_pinconf_dbg_show+0x18/0x2c0) [ 51.140000] [<c01e7304>] (at91_pinconf_dbg_show) from [<c01e6034>] (pinconf_pins_show+0xc8/0xf8) [ 51.140000] [<c01e6034>] (pinconf_pins_show) from [<c00ae0b8>] (seq_read+0x1a0/0x464) [ 51.140000] [<c00ae0b8>] (seq_read) from [<c0090dec>] (__vfs_read+0x20/0xd0) [ 51.140000] [<c0090dec>] (__vfs_read) from [<c0091508>] (vfs_read+0x7c/0x108) [ 51.140000] [<c0091508>] (vfs_read) from [<c0091d9c>] (SyS_read+0x40/0x94) [ 51.140000] [<c0091d9c>] (SyS_read) from [<c000efa0>] (ret_fast_syscall+0x0/0x3c) [ 51.140000] Code: eb010ec2 e30a0d08 e34c005a eb0ae5a7 (e5993000) [ 51.150000] ---[ end trace fb3c370da3ea4794 ]--- Fixes: a0b957f306fa ("pinctrl: at91: allow to have disabled gpio bank") Cc: stable@vger.kernel.org # 3.18 Signed-off-by: David Dueck <davidcdueck@googlemail.com> Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Boris Brezillon <boris.brezillon@free-electrons.com> Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-08-30Linux 4.2v4.2Linus Torvalds
generated by cgit (git 2.34.1) at 2025-09-14 08:31:51 +0000