1. 05 Nov, 2015 22 commits
  2. 04 Nov, 2015 18 commits
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide · 1b1050cd
      Linus Torvalds authored
      Pull IDE fixlet from David Miller:
       "Just a y2038 fix to the pdc202xx_new IDE driver"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide:
        ide: pdc202xx_new: Replace timeval with ktime_t
      1b1050cd
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next · b0f85fa1
      Linus Torvalds authored
      Pull networking updates from David Miller:
      
      Changes of note:
      
       1) Allow to schedule ICMP packets in IPVS, from Alex Gartrell.
      
       2) Provide FIB table ID in ipv4 route dumps just as ipv6 does, from
          David Ahern.
      
       3) Allow the user to ask for the statistics to be filtered out of
          ipv4/ipv6 address netlink dumps.  From Sowmini Varadhan.
      
       4) More work to pass the network namespace context around deep into
          various packet path APIs, starting with the netfilter hooks.  From
          Eric W Biederman.
      
       5) Add layer 2 TX/RX checksum offloading to qeth driver, from Thomas
          Richter.
      
       6) Use usec resolution for SYN/ACK RTTs in TCP, from Yuchung Cheng.
      
       7) Support Very High Throughput in wireless MESH code, from Bob
          Copeland.
      
       8) Allow setting the ageing_time in switchdev/rocker.  From Scott
          Feldman.
      
       9) Properly autoload L2TP type modules, from Stephen Hemminger.
      
      10) Fix and enable offload features by default in 8139cp driver, from
          David Woodhouse.
      
      11) Support both ipv4 and ipv6 sockets in a single vxlan device, from
          Jiri Benc.
      
      12) Fix CWND limiting of thin streams in TCP, from Bendik Rønning
          Opstad.
      
      13) Fix IPSEC flowcache overflows on large systems, from Steffen
          Klassert.
      
      14) Convert bridging to track VLANs using rhashtable entries rather than
          a bitmap.  From Nikolay Aleksandrov.
      
      15) Make TCP listener handling completely lockless, this is a major
          accomplishment.  Incoming request sockets now live in the
          established hash table just like any other socket too.
      
          From Eric Dumazet.
      
      15) Provide more bridging attributes to netlink, from Nikolay
          Aleksandrov.
      
      16) Use hash based algorithm for ipv4 multipath routing, this was very
          long overdue.  From Peter Nørlund.
      
      17) Several y2038 cures, mostly avoiding timespec.  From Arnd Bergmann.
      
      18) Allow non-root execution of EBPF programs, from Alexei Starovoitov.
      
      19) Support SO_INCOMING_CPU as setsockopt, from Eric Dumazet.  This
          influences the port binding selection logic used by SO_REUSEPORT.
      
      20) Add ipv6 support to VRF, from David Ahern.
      
      21) Add support for Mellanox Spectrum switch ASIC, from Jiri Pirko.
      
      22) Add rtl8xxxu Realtek wireless driver, from Jes Sorensen.
      
      23) Implement RACK loss recovery in TCP, from Yuchung Cheng.
      
      24) Support multipath routes in MPLS, from Roopa Prabhu.
      
      25) Fix POLLOUT notification for listening sockets in AF_UNIX, from Eric
          Dumazet.
      
      26) Add new QED Qlogic river, from Yuval Mintz, Manish Chopra, and
          Sudarsana Kalluru.
      
      27) Don't fetch timestamps on AF_UNIX sockets, from Hannes Frederic
          Sowa.
      
      28) Support ipv6 geneve tunnels, from John W Linville.
      
      29) Add flood control support to switchdev layer, from Ido Schimmel.
      
      30) Fix CHECKSUM_PARTIAL handling of potentially fragmented frames, from
          Hannes Frederic Sowa.
      
      31) Support persistent maps and progs in bpf, from Daniel Borkmann.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1790 commits)
        sh_eth: use DMA barriers
        switchdev: respect SKIP_EOPNOTSUPP flag in case there is no recursion
        net: sched: kill dead code in sch_choke.c
        irda: Delete an unnecessary check before the function call "irlmp_unregister_service"
        net: dsa: mv88e6xxx: include DSA ports in VLANs
        net: dsa: mv88e6xxx: disable SA learning for DSA and CPU ports
        net/core: fix for_each_netdev_feature
        vlan: Invoke driver vlan hooks only if device is present
        arcnet/com20020: add LEDS_CLASS dependency
        bpf, verifier: annotate verbose printer with __printf
        dp83640: Only wait for timestamps for packets with timestamping enabled.
        ptp: Change ptp_class to a proper bitmask
        dp83640: Prune rx timestamp list before reading from it
        dp83640: Delay scheduled work.
        dp83640: Include hash in timestamp/packet matching
        ipv6: fix tunnel error handling
        net/mlx5e: Fix LSO vlan insertion
        net/mlx5e: Re-eanble client vlan TX acceleration
        net/mlx5e: Return error in case mlx5e_set_features() fails
        net/mlx5e: Don't allow more than max supported channels
        ...
      b0f85fa1
    • Linus Torvalds's avatar
      Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 · ccc9d4a6
      Linus Torvalds authored
      Pull crypto update from Herbert Xu:
       "API:
      
         - Add support for cipher output IVs in testmgr
         - Add missing crypto_ahash_blocksize helper
         - Mark authenc and des ciphers as not allowed under FIPS.
      
      Algorithms:
      
         - Add CRC support to 842 compression
         - Add keywrap algorithm
         - A number of changes to the akcipher interface:
            + Separate functions for setting public/private keys.
            + Use SG lists.
      
      Drivers:
      
         - Add Intel SHA Extension optimised SHA1 and SHA256
         - Use dma_map_sg instead of custom functions in crypto drivers
         - Add support for STM32 RNG
         - Add support for ST RNG
         - Add Device Tree support to exynos RNG driver
         - Add support for mxs-dcp crypto device on MX6SL
         - Add xts(aes) support to caam
         - Add ctr(aes) and xts(aes) support to qat
         - A large set of fixes from Russell King for the marvell/cesa driver"
      
      * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (115 commits)
        crypto: asymmetric_keys - Fix unaligned access in x509_get_sig_params()
        crypto: akcipher - Don't #include crypto/public_key.h as the contents aren't used
        hwrng: exynos - Add Device Tree support
        hwrng: exynos - Fix missing configuration after suspend to RAM
        hwrng: exynos - Add timeout for waiting on init done
        dt-bindings: rng: Describe Exynos4 PRNG bindings
        crypto: marvell/cesa - use __le32 for hardware descriptors
        crypto: marvell/cesa - fix missing cpu_to_le32() in mv_cesa_dma_add_op()
        crypto: marvell/cesa - use memcpy_fromio()/memcpy_toio()
        crypto: marvell/cesa - use gfp_t for gfp flags
        crypto: marvell/cesa - use dma_addr_t for cur_dma
        crypto: marvell/cesa - use readl_relaxed()/writel_relaxed()
        crypto: caam - fix indentation of close braces
        crypto: caam - only export the state we really need to export
        crypto: caam - fix non-block aligned hash calculation
        crypto: caam - avoid needlessly saving and restoring caam_hash_ctx
        crypto: caam - print errno code when hash registration fails
        crypto: marvell/cesa - fix memory leak
        crypto: marvell/cesa - fix first-fragment handling in mv_cesa_ahash_dma_last_req()
        crypto: marvell/cesa - rearrange handling for sw padded hashes
        ...
      ccc9d4a6
    • Linus Torvalds's avatar
      Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 66ef3493
      Linus Torvalds authored
      Pull x86 platform changes from Ingo Molnar:
       "Misc updates to the Intel MID and SGI UV platforms"
      
      * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/intel-mid: Make intel_mid_ops static
        arch/x86/intel-mid: Use kmemdup rather than duplicating its implementation
        x86/platform/uv: Implement simple dump failover if kdump fails
        x86/platform/uv: Insert per_cpu accessor function on uv_hub_nmi
      66ef3493
    • Linus Torvalds's avatar
      Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 639ab3eb
      Linus Torvalds authored
      Pull x86 mm changes from Ingo Molnar:
       "The main changes are: continued PAT work by Toshi Kani, plus a new
        boot time warning about insecure RWX kernel mappings, by Stephen
        Smalley.
      
        The new CONFIG_DEBUG_WX=y warning is marked default-y if
        CONFIG_DEBUG_RODATA=y is already eanbled, as a special exception, as
        these bugs are hard to notice and this check already found several
        live bugs"
      
      * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/mm: Warn on W^X mappings
        x86/mm: Fix no-change case in try_preserve_large_page()
        x86/mm: Fix __split_large_page() to handle large PAT bit
        x86/mm: Fix try_preserve_large_page() to handle large PAT bit
        x86/mm: Fix gup_huge_p?d() to handle large PAT bit
        x86/mm: Fix slow_virt_to_phys() to handle large PAT bit
        x86/mm: Fix page table dump to show PAT bit
        x86/asm: Add pud_pgprot() and pmd_pgprot()
        x86/asm: Fix pud/pmd interfaces to handle large PAT bit
        x86/asm: Add pud/pmd mask interfaces to handle large PAT bit
        x86/asm: Move PUD_PAGE macros to page_types.h
        x86/vdso32: Define PGTABLE_LEVELS to 32bit VDSO
      639ab3eb
    • Linus Torvalds's avatar
      Merge branch 'x86-headers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 4302d506
      Linus Torvalds authored
      Pull x86 sigcontext header cleanups from Ingo Molnar:
       "This series reorganizes and cleans up various aspects of the main
        sigcontext UAPI headers, such as unifying the data structures and
        updating/adding lots of comments to explain all the ABI details and
        quirks.  The headers can now also be built in user-space standalone"
      
      * 'x86-headers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/headers: Clean up too long lines
        x86/headers: Remove <asm/sigcontext.h> references on the kernel side
        x86/headers: Remove direct sigcontext32.h uses
        x86/headers: Convert sigcontext_ia32 uses to sigcontext_32
        x86/headers: Unify 'struct sigcontext_ia32' and 'struct sigcontext_32'
        x86/headers: Make sigcontext pointers bit independent
        x86/headers: Move the 'struct sigcontext' definitions into the UAPI header
        x86/headers: Clean up the kernel's struct sigcontext types to be ABI-clean
        x86/headers: Convert uses of _fpstate_ia32 to _fpstate_32
        x86/headers: Unify 'struct _fpstate_ia32' and i386 struct _fpstate
        x86/headers: Unify register type definitions between 32-bit compat and i386
        x86/headers: Use ABI types consistently in sigcontext*.h
        x86/headers: Separate out legacy user-space structure definitions
        x86/headers: Clean up and better document uapi/asm/sigcontext.h
        x86/headers: Clean up uapi/asm/sigcontext32.h
        x86/headers: Fix (old) header file dependency bug in uapi/asm/sigcontext32.h
      4302d506
    • Linus Torvalds's avatar
      Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · ce4d72fa
      Linus Torvalds authored
      Pull x86 fpu changes from Ingo Molnar:
       "There are two main areas of changes:
      
         - Rework of the extended FPU state code to robustify the kernel's
           usage of cpuid provided xstate sizes - and related changes (Dave
           Hansen)"
      
         - math emulation enhancements: new modern FPU instructions support,
           with testcases, plus cleanups (Denys Vlasnko)"
      
      * 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
        x86/fpu: Fixup uninitialized feature_name warning
        x86/fpu/math-emu: Add support for FISTTP instructions
        x86/fpu/math-emu, selftests: Add test for FISTTP instructions
        x86/fpu/math-emu: Add support for FCMOVcc insns
        x86/fpu/math-emu: Add support for F[U]COMI[P] insns
        x86/fpu/math-emu: Remove define layer for undocumented opcodes
        x86/fpu/math-emu, selftests: Add tests for FCMOV and FCOMI insns
        x86/fpu/math-emu: Remove !NO_UNDOC_CODE
        x86/fpu: Check CPU-provided sizes against struct declarations
        x86/fpu: Check to ensure increasing-offset xstate offsets
        x86/fpu: Correct and check XSAVE xstate size calculations
        x86/fpu: Add C structures for AVX-512 state components
        x86/fpu: Rework YMM definition
        x86/fpu/mpx: Rework MPX 'xstate' types
        x86/fpu: Add xfeature_enabled() helper instead of test_bit()
        x86/fpu: Remove 'xfeature_nr'
        x86/fpu: Rework XSTATE_* macros to remove magic '2'
        x86/fpu: Rename XFEATURES_NR_MAX
        x86/fpu: Rename XSAVE macros
        x86/fpu: Remove partial LWP support definitions
        ...
      ce4d72fa
    • Linus Torvalds's avatar
      Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 0f25f2c1
      Linus Torvalds authored
      Pull x86 kgdb fixlet from Ingo Molnar:
       "A single debugging related commit: compress the memory usage of a kgdb
        data structure"
      
      * 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/kgdb: Replace bool_int_array[NR_CPUS] with bitmap
      0f25f2c1
    • Linus Torvalds's avatar
      Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · f323c49b
      Linus Torvalds authored
      Pull x86 cpu changes from Ingo Molnar:
       "Two changes in this cycle: a Kconfig help text enhancement, and an AMD
        CLZERO instruction capability detection and enumeration"
      
      * 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/cpu: Add CLZERO detection
        x86/Kconfig/cpus: Fix/complete CPU type help texts
      f323c49b
    • Linus Torvalds's avatar
      Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 33d46f97
      Linus Torvalds authored
      Pull x86 cleanups from Ingo Molnar:
       "An early_printk cleanup plus deinlining enhancements"
      
      * 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/early_printk: Set __iomem address space for IO
        x86/signal: Deinline get_sigframe, save 240 bytes
        x86: Deinline early_console_register, save 403 bytes
        x86/e820: Deinline e820_type_to_string, save 126 bytes
      33d46f97
    • Linus Torvalds's avatar
      Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 378e4e98
      Linus Torvalds authored
      Pull x86 boot cleanup from Ingo Molnar:
       "A single commit: remove an obsolete kcrash boot flag"
      
      * 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/kexec: Remove obsolete 'in_crash_kexec' flag
      378e4e98
    • Linus Torvalds's avatar
      Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · a75a3f6f
      Linus Torvalds authored
      Pull x86 asm changes from Ingo Molnar:
       "The main change in this cycle is another step in the big x86 system
        call interface rework by Andy Lutomirski, which moves most of the low
        level x86 entry code from assembly to C, for all syscall entries
        except native 64-bit system calls:
      
          arch/x86/entry/entry_32.S        | 182 ++++------
          arch/x86/entry/entry_64_compat.S | 547 ++++++++-----------------------
          194 insertions(+), 535 deletions(-)
      
        ... our hope is that the final remaining step (converting native
        64-bit system calls) will be less painful as all the previous steps,
        given that most of the legacies and quirks are concentrated around
        native 32-bit and compat environments"
      
      * 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (47 commits)
        x86/entry/32: Fix FS and GS restore in opportunistic SYSEXIT
        x86/entry/32: Fix entry_INT80_32() to expect interrupts to be on
        um/x86: Fix build after x86 syscall changes
        x86/asm: Remove the xyz_cfi macros from dwarf2.h
        selftests/x86: Style fixes for the 'unwind_vdso' test
        x86/entry/64/compat: Document sysenter_fix_flags's reason for existence
        x86/entry: Split and inline syscall_return_slowpath()
        x86/entry: Split and inline prepare_exit_to_usermode()
        x86/entry: Use pt_regs_to_thread_info() in syscall entry tracing
        x86/entry: Hide two syscall entry assertions behind CONFIG_DEBUG_ENTRY
        x86/entry: Micro-optimize compat fast syscall arg fetch
        x86/entry: Force inlining of 32-bit syscall code
        x86/entry: Make irqs_disabled checks in exit code depend on lockdep
        x86/entry: Remove unnecessary IRQ twiddling in fast 32-bit syscalls
        x86/asm: Remove thread_info.sysenter_return
        x86/entry/32: Re-implement SYSENTER using the new C path
        x86/entry/32: Switch INT80 to the new C syscall path
        x86/entry/32: Open-code return tracking from fork and kthreads
        x86/entry/compat: Implement opportunistic SYSRETL for compat syscalls
        x86/vdso/compat: Wire up SYSENTER and SYSCSALL for compat userspace
        ...
      a75a3f6f
    • Linus Torvalds's avatar
      Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · d2bea739
      Linus Torvalds authored
      Pull x86 apic changes from Ingo Molnar:
       "The main changes in this cycle were:
      
         - Numachip updates: new hardware support, fixes and cleanups.
           (Daniel J Blueman)
      
         - misc smaller cleanups and fixlets"
      
      * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/io_apic: Make eoi_ioapic_pin() static
        x86/irq: Drop unlikely before IS_ERR_OR_NULL
        x86/x2apic: Make stub functions available even if !CONFIG_X86_LOCAL_APIC
        x86/apic: Deinline various functions
        x86/numachip: Fix timer build conflict
        x86/numachip: Introduce Numachip2 timer mechanisms
        x86/numachip: Add Numachip IPI optimisations
        x86/numachip: Add Numachip2 APIC support
        x86/numachip: Cleanup Numachip support
      d2bea739
    • Linus Torvalds's avatar
      Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 53528695
      Linus Torvalds authored
      Pull scheduler changes from Ingo Molnar:
       "The main changes in this cycle were:
      
         - sched/fair load tracking fixes and cleanups (Byungchul Park)
      
         - Make load tracking frequency scale invariant (Dietmar Eggemann)
      
         - sched/deadline updates (Juri Lelli)
      
         - stop machine fixes, cleanups and enhancements for bugs triggered by
           CPU hotplug stress testing (Oleg Nesterov)
      
         - scheduler preemption code rework: remove PREEMPT_ACTIVE and related
           cleanups (Peter Zijlstra)
      
         - Rework the sched_info::run_delay code to fix races (Peter Zijlstra)
      
         - Optimize per entity utilization tracking (Peter Zijlstra)
      
         - ... misc other fixes, cleanups and smaller updates"
      
      * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (57 commits)
        sched: Don't scan all-offline ->cpus_allowed twice if !CONFIG_CPUSETS
        sched: Move cpu_active() tests from stop_two_cpus() into migrate_swap_stop()
        sched: Start stopper early
        stop_machine: Kill cpu_stop_threads->setup() and cpu_stop_unpark()
        stop_machine: Kill smp_hotplug_thread->pre_unpark, introduce stop_machine_unpark()
        stop_machine: Change cpu_stop_queue_two_works() to rely on stopper->enabled
        stop_machine: Introduce __cpu_stop_queue_work() and cpu_stop_queue_two_works()
        stop_machine: Ensure that a queued callback will be called before cpu_stop_park()
        sched/x86: Fix typo in __switch_to() comments
        sched/core: Remove a parameter in the migrate_task_rq() function
        sched/core: Drop unlikely behind BUG_ON()
        sched/core: Fix task and run queue sched_info::run_delay inconsistencies
        sched/numa: Fix task_tick_fair() from disabling numa_balancing
        sched/core: Add preempt_count invariant check
        sched/core: More notrace annotations
        sched/core: Kill PREEMPT_ACTIVE
        sched/core, sched/x86: Kill thread_info::saved_preempt_count
        sched/core: Simplify preempt_count tests
        sched/core: Robustify preemption leak checks
        sched/core: Stop setting PREEMPT_ACTIVE
        ...
      53528695
    • Linus Torvalds's avatar
      Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · b831ef2c
      Linus Torvalds authored
      Pull RAS changes from Ingo Molnar:
       "The main system reliability related changes were from x86, but also
        some generic RAS changes:
      
         - AMD MCE error injection subsystem enhancements.  (Aravind
           Gopalakrishnan)
      
         - Fix MCE and CPU hotplug interaction bug.  (Ashok Raj)
      
         - kcrash bootup robustness fix.  (Baoquan He)
      
         - kcrash cleanups.  (Borislav Petkov)
      
         - x86 microcode driver rework: simplify it by unmodularizing it and
           other cleanups.  (Borislav Petkov)"
      
      * 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
        x86/mce: Add a default case to the switch in __mcheck_cpu_ancient_init()
        x86/mce: Add a Scalable MCA vendor flags bit
        MAINTAINERS: Unify the microcode driver section
        x86/microcode/intel: Move #ifdef DEBUG inside the function
        x86/microcode/amd: Remove maintainers from comments
        x86/microcode: Remove modularization leftovers
        x86/microcode: Merge the early microcode loader
        x86/microcode: Unmodularize the microcode driver
        x86/mce: Fix thermal throttling reporting after kexec
        kexec/crash: Say which char is the unrecognized
        x86/setup/crash: Check memblock_reserve() retval
        x86/setup/crash: Cleanup some more
        x86/setup/crash: Remove alignment variable
        x86/setup: Cleanup crashkernel reservation functions
        x86/amd_nb, EDAC: Rename amd_get_node_id()
        x86/setup: Do not reserve crashkernel high memory if low reservation failed
        x86/microcode/amd: Do not overwrite final patch levels
        x86/microcode/amd: Extract current patch level read to a function
        x86/ras/mce_amd_inj: Inject bank 4 errors on the NBC
        x86/ras/mce_amd_inj: Trigger deferred and thresholding errors interrupts
        ...
      b831ef2c
    • Linus Torvalds's avatar
      Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · b02ac6b1
      Linus Torvalds authored
      Pull perf updates from Ingo Molnar:
       "Kernel side changes:
      
         - Improve accuracy of perf/sched clock on x86.  (Adrian Hunter)
      
         - Intel DS and BTS updates.  (Alexander Shishkin)
      
         - Intel cstate PMU support.  (Kan Liang)
      
         - Add group read support to perf_event_read().  (Peter Zijlstra)
      
         - Branch call hardware sampling support, implemented on x86 and
           PowerPC.  (Stephane Eranian)
      
         - Event groups transactional interface enhancements.  (Sukadev
           Bhattiprolu)
      
         - Enable proper x86/intel/uncore PMU support on multi-segment PCI
           systems.  (Taku Izumi)
      
         - ... misc fixes and cleanups.
      
        The perf tooling team was very busy again with 200+ commits, the full
        diff doesn't fit into lkml size limits.  Here's an (incomplete) list
        of the tooling highlights:
      
        New features:
      
         - Change the default event used in all tools (record/top): use the
           most precise "cycles" hw counter available, i.e. when the user
           doesn't specify any event, it will try using cycles:ppp, cycles:pp,
           etc and fall back transparently until it finds a working counter.
           (Arnaldo Carvalho de Melo)
      
         - Integration of perf with eBPF that, given an eBPF .c source file
           (or .o file built for the 'bpf' target with clang), will get it
           automatically built, validated and loaded into the kernel via the
           sys_bpf syscall, which can then be used and seen using 'perf trace'
           and other tools.
      
           (Wang Nan)
      
        Various user interface improvements:
      
         - Automatic pager invocation on long help output.  (Namhyung Kim)
      
         - Search for more options when passing args to -h, e.g.: (Arnaldo
           Carvalho de Melo)
      
              $ perf report -h interface
      
              Usage: perf report [<options>]
      
               --gtk    Use the GTK2 interface
               --stdio  Use the stdio interface
               --tui    Use the TUI interface
      
         - Show ordered command line options when -h is used or when an
           unknown option is specified.  (Arnaldo Carvalho de Melo)
      
         - If options are passed after -h, show just its descriptions, not all
           options.  (Arnaldo Carvalho de Melo)
      
         - Implement column based horizontal scrolling in the hists browser
           (top, report), making it possible to use the TUI for things like
           'perf mem report' where there are many more columns than can fit in
           a terminal.  (Arnaldo Carvalho de Melo)
      
         - Enhance the error reporting of tracepoint event parsing, e.g.:
      
             $ oldperf record -e sched:sched_switc usleep 1
             event syntax error: 'sched:sched_switc'
                                  \___ unknown tracepoint
             Run 'perf list' for a list of valid events
      
           Now we get the much nicer:
      
             $ perf record -e sched:sched_switc ls
             event syntax error: 'sched:sched_switc'
                                  \___ can't access trace events
      
             Error: No permissions to read /sys/kernel/debug/tracing/events/sched/sched_switc
             Hint:  Try 'sudo mount -o remount,mode=755 /sys/kernel/debug'
      
           And after we have those mount point permissions fixed:
      
             $ perf record -e sched:sched_switc ls
             event syntax error: 'sched:sched_switc'
                                  \___ unknown tracepoint
      
             Error: File /sys/kernel/debug/tracing/events/sched/sched_switc not found.
             Hint:  Perhaps this kernel misses some CONFIG_ setting to enable this feature?.
      
           I.e.  basically now the event parsing routing uses the strerror_open()
           routines introduced by and used in 'perf trace' work.  (Jiri Olsa)
      
         - Fail properly when pattern matching fails to find a tracepoint,
           i.e. '-e non:existent' was being correctly handled, with a proper
           error message about that not being a valid event, but '-e
           non:existent*' wasn't, fix it.  (Jiri Olsa)
      
         - Do event name substring search as last resort in 'perf list'.
           (Arnaldo Carvalho de Melo)
      
           E.g.:
      
             # perf list clock
      
             List of pre-defined events (to be used in -e):
      
              cpu-clock                                          [Software event]
              task-clock                                         [Software event]
      
              uncore_cbox_0/clockticks/                          [Kernel PMU event]
              uncore_cbox_1/clockticks/                          [Kernel PMU event]
      
              kvm:kvm_pvclock_update                             [Tracepoint event]
              kvm:kvm_update_master_clock                        [Tracepoint event]
              power:clock_disable                                [Tracepoint event]
              power:clock_enable                                 [Tracepoint event]
              power:clock_set_rate                               [Tracepoint event]
              syscalls:sys_enter_clock_adjtime                   [Tracepoint event]
              syscalls:sys_enter_clock_getres                    [Tracepoint event]
              syscalls:sys_enter_clock_gettime                   [Tracepoint event]
              syscalls:sys_enter_clock_nanosleep                 [Tracepoint event]
              syscalls:sys_enter_clock_settime                   [Tracepoint event]
              syscalls:sys_exit_clock_adjtime                    [Tracepoint event]
              syscalls:sys_exit_clock_getres                     [Tracepoint event]
              syscalls:sys_exit_clock_gettime                    [Tracepoint event]
              syscalls:sys_exit_clock_nanosleep                  [Tracepoint event]
              syscalls:sys_exit_clock_settime                    [Tracepoint event]
      
        Intel PT hardware tracing enhancements:
      
         - Accept a zero --itrace period, meaning "as often as possible".  In
           the case of Intel PT that is the same as a period of 1 and a unit
           of 'instructions' (i.e.  --itrace=i1i).  (Adrian Hunter)
      
         - Harmonize itrace's synthesized callchains with the existing
           --max-stack tool option.  (Adrian Hunter)
      
         - Allow time to be displayed in nanoseconds in 'perf script'.
           (Adrian Hunter)
      
         - Fix potential infinite loop when handling Intel PT timestamps.
           (Adrian Hunter)
      
         - Slighly improve Intel PT debug logging.  (Adrian Hunter)
      
         - Warn when AUX data has been lost, just like when processing
           PERF_RECORD_LOST.  (Adrian Hunter)
      
         - Further document export-to-postgresql.py script.  (Adrian Hunter)
      
         - Add option to synthesize branch stack from auxtrace data.  (Adrian
           Hunter)
      
        Misc notable changes:
      
         - Switch the default callchain output mode to 'graph,0.5,caller', to
           make it look like the default for other tools, reducing the
           learning curve for people used to 'caller' based viewing.  (Arnaldo
           Carvalho de Melo)
      
         - various call chain usability enhancements.  (Namhyung Kim)
      
         - Introduce the 'P' event modifier, meaning 'max precision level,
           please', i.e.:
      
              $ perf record -e cycles:P usleep 1
      
           Is now similar to:
      
              $ perf record usleep 1
      
           Useful, for instance, when specifying multiple events.  (Jiri Olsa)
      
         - Add 'socket' sort entry, to sort by the processor socket in 'perf
           top' and 'perf report'.  (Kan Liang)
      
         - Introduce --socket-filter to 'perf report', for filtering by
           processor socket.  (Kan Liang)
      
         - Add new "Zoom into Processor Socket" operation in the perf hists
           browser, used in 'perf top' and 'perf report'.  (Kan Liang)
      
         - Allow probing on kmodules without DWARF.  (Masami Hiramatsu)
      
         - Fix 'perf probe -l' for probes added to kernel module functions.
           (Masami Hiramatsu)
      
         - Preparatory work for the 'perf stat record' feature that will allow
           generating perf.data files with counting data in addition to the
           sampling mode we have now (Jiri Olsa)
      
         - Update libtraceevent KVM plugin.  (Paolo Bonzini)
      
         - ... plus lots of other enhancements that I failed to list properly,
           by: Adrian Hunter, Alexander Shishkin, Andi Kleen, Andrzej Hajda,
           Arnaldo Carvalho de Melo, Dima Kogan, Don Zickus, Geliang Tang, He
           Kuang, Huaitong Han, Ingo Molnar, Jan Stancek, Jiri Olsa, Kan
           Liang, Kirill Tkhai, Masami Hiramatsu, Matt Fleming, Namhyung Kim,
           Paolo Bonzini, Peter Zijlstra, Rabin Vincent, Scott Wood, Stephane
           Eranian, Sukadev Bhattiprolu, Taku Izumi, Vaishali Thakkar, Wang
           Nan, Yang Shi and Yunlong Song"
      
      * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (260 commits)
        perf unwind: Pass symbol source to libunwind
        tools build: Fix libiberty feature detection
        perf tools: Compile scriptlets to BPF objects when passing '.c' to --event
        perf record: Add clang options for compiling BPF scripts
        perf bpf: Attach eBPF filter to perf event
        perf tools: Make sure fixdep is built before libbpf
        perf script: Enable printing of branch stack
        perf trace: Add cmd string table to decode sys_bpf first arg
        perf bpf: Collect perf_evsel in BPF object files
        perf tools: Load eBPF object into kernel
        perf tools: Create probe points for BPF programs
        perf tools: Enable passing bpf object file to --event
        perf ebpf: Add the libbpf glue
        perf tools: Make perf depend on libbpf
        perf symbols: Fix endless loop in dso__split_kallsyms_for_kcore
        perf tools: Enable pre-event inherit setting by config terms
        perf symbols: we can now read separate debug-info files based on a build ID
        perf symbols: Fix type error when reading a build-id
        perf tools: Search for more options when passing args to -h
        perf stat: Cache aggregated map entries in extra cpumap
        ...
      b02ac6b1
    • Linus Torvalds's avatar
      atomic: remove all traces of READ_ONCE_CTRL() and atomic*_read_ctrl() · 105ff3cb
      Linus Torvalds authored
      This seems to be a mis-reading of how alpha memory ordering works, and
      is not backed up by the alpha architecture manual.  The helper functions
      don't do anything special on any other architectures, and the arguments
      that support them being safe on other architectures also argue that they
      are safe on alpha.
      
      Basically, the "control dependency" is between a previous read and a
      subsequent write that is dependent on the value read.  Even if the
      subsequent write is actually done speculatively, there is no way that
      such a speculative write could be made visible to other cpu's until it
      has been committed, which requires validating the speculation.
      
      Note that most weakely ordered architectures (very much including alpha)
      do not guarantee any ordering relationship between two loads that depend
      on each other on a control dependency:
      
          read A
          if (val == 1)
              read B
      
      because the conditional may be predicted, and the "read B" may be
      speculatively moved up to before reading the value A.  So we require the
      user to insert a smp_rmb() between the two accesses to be correct:
      
          read A;
          if (A == 1)
              smp_rmb()
              read B
      
      Alpha is further special in that it can break that ordering even if the
      *address* of B depends on the read of A, because the cacheline that is
      read later may be stale unless you have a memory barrier in between the
      pointer read and the read of the value behind a pointer:
      
          read ptr
          read offset(ptr)
      
      whereas all other weakly ordered architectures guarantee that the data
      dependency (as opposed to just a control dependency) will order the two
      accesses.  As a result, alpha needs a "smp_read_barrier_depends()" in
      between those two reads for them to be ordered.
      
      The coontrol dependency that "READ_ONCE_CTRL()" and "atomic_read_ctrl()"
      had was a control dependency to a subsequent *write*, however, and
      nobody can finalize such a subsequent write without having actually done
      the read.  And were you to write such a value to a "stale" cacheline
      (the way the unordered reads came to be), that would seem to lose the
      write entirely.
      
      So the things that make alpha able to re-order reads even more
      aggressively than other weak architectures do not seem to be relevant
      for a subsequent write.  Alpha memory ordering may be strange, but
      there's no real indication that it is *that* strange.
      
      Also, the alpha architecture reference manual very explicitly talks
      about the definition of "Dependence Constraints" in section 5.6.1.7,
      where a preceding read dominates a subsequent write.
      
      Such a dependence constraint admittedly does not impose a BEFORE (alpha
      architecture term for globally visible ordering), but it does guarantee
      that there can be no "causal loop".  I don't see how you could avoid
      such a loop if another cpu could see the stored value and then impact
      the value of the first read.  Put another way: the read and the write
      could not be seen as being out of order wrt other cpus.
      
      So I do not see how these "x_ctrl()" functions can currently be necessary.
      
      I may have to eat my words at some point, but in the absense of clear
      proof that alpha actually needs this, or indeed even an explanation of
      how alpha could _possibly_ need it, I do not believe these functions are
      called for.
      
      And if it turns out that alpha really _does_ need a barrier for this
      case, that barrier still should not be "smp_read_barrier_depends()".
      We'd have to make up some new speciality barrier just for alpha, along
      with the documentation for why it really is necessary.
      
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul E McKenney <paulmck@us.ibm.com>
      Cc: Dmitry Vyukov <dvyukov@google.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Ingo Molnar <mingo@kernel.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      105ff3cb
    • Linus Torvalds's avatar
      Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · d63a9788
      Linus Torvalds authored
      Pull locking changes from Ingo Molnar:
       "The main changes in this cycle were:
      
         - More gradual enhancements to atomic ops: new atomic*_read_ctrl()
           ops, synchronize atomic_{read,set}() ordering requirements between
           architectures, add atomic_long_t bitops.  (Peter Zijlstra)
      
         - Add _{relaxed|acquire|release}() variants for inc/dec atomics and
           use them in various locking primitives: mutex, rtmutex, mcs, rwsem.
           This enables weakly ordered architectures (such as arm64) to make
           use of more locking related optimizations.  (Davidlohr Bueso)
      
         - Implement atomic[64]_{inc,dec}_relaxed() on ARM.  (Will Deacon)
      
         - Futex kernel data cache footprint micro-optimization.  (Rasmus
           Villemoes)
      
         - pvqspinlock runtime overhead micro-optimization.  (Waiman Long)
      
         - misc smaller fixlets"
      
      * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        ARM, locking/atomics: Implement _relaxed variants of atomic[64]_{inc,dec}
        locking/rwsem: Use acquire/release semantics
        locking/mcs: Use acquire/release semantics
        locking/rtmutex: Use acquire/release semantics
        locking/mutex: Use acquire/release semantics
        locking/asm-generic: Add _{relaxed|acquire|release}() variants for inc/dec atomics
        atomic: Implement atomic_read_ctrl()
        atomic, arch: Audit atomic_{read,set}()
        atomic: Add atomic_long_t bitops
        futex: Force hot variables into a single cache line
        locking/pvqspinlock: Kick the PV CPU unconditionally when _Q_SLOW_VAL
        locking/osq: Relax atomic semantics
        locking/qrwlock: Rename ->lock to ->wait_lock
        locking/Documentation/lockstat: Fix typo - lokcing -> locking
        locking/atomics, cmpxchg: Privatize the inclusion of asm/cmpxchg.h
      d63a9788