1. 03 12月, 2013 6 次提交
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      posix-timers: Fix full dynticks CPUs kick on timer rescheduling · c925077c
      Frederic Weisbecker 提交于
      A posix CPU timer can be rearmed while it is firing or after it is
      notified with a signal. This can happen for example with timers that
      were set with a non zero interval in timer_settime().
      
      This rearming can happen in two places:
      
      1) On timer firing time, which happens on the target's tick. If the timer
      can't trigger a signal because it is ignored, it reschedules itself
      to honour the timer interval.
      
      2) On signal handling from the timer's notification target. This one
      can be a different task than the timer's target itself. Once the
      signal is notified, the notification target rearms the timer, again
      to honour the timer interval.
      
      When a timer is rearmed, we need to notify the full dynticks CPUs
      such that they restart their tick in case they are running tasks that
      may have a share in elapsing this timer.
      
      Now the 1st case above handles full dynticks CPUs with a call to
      posix_cpu_timer_kick_nohz() from the posix cpu timer firing code. But
      the second case ignores the fact that some CPUs may run non-idle tasks
      with their tick off. As a result, when a timer is resheduled after its signal
      notification, the full dynticks CPUs may completely ignore it and not
      tick on the timer as expected
      
      This patch fixes this bug by handling both cases in one. All we need
      is to move the kick to the rearming common code in posix_cpu_timer_schedule().
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Olivier Langlois <olivier@olivierlanglois.net>
      c925077c
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      posix-timers: Spare workqueue if there is no full dynticks CPU to kick · d4283c65
      Frederic Weisbecker 提交于
      After a posix cpu timer is set, a workqueue is scheduled in order to
      kick the full dynticks CPUs and let them restart their tick if
      necessary in case the task they are running is concerned by the
      new timer.
      
      This kick is implemented by way of IPIs, which require interrupts
      to be enabled, hence the need for a workqueue to raise them because
      the posix cpu timer set path has interrupts disabled.
      
      Now if there is no full dynticks CPU on the system, the workqueue is
      still scheduled but it simply won't send any IPI and return immediately.
      
      So lets spare that worqueue when it is not needed.
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      d4283c65
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      context_tracking: Rename context_tracking_active() to context_tracking_cpu_is_enabled() · d0df09eb
      Frederic Weisbecker 提交于
      We currently have a confusing couple of API naming with the existing
      context_tracking_active() and context_tracking_is_enabled().
      
      Lets keep the latter one, context_tracking_is_enabled(), for global
      context tracking state check and use context_tracking_cpu_is_enabled()
      for local state check.
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      d0df09eb
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      context_tracking: Wrap static key check into more intuitive function name · 58135f57
      Frederic Weisbecker 提交于
      Use a function with a meaningful name to check the global context
      tracking state. static_key_false() is a bit confusing for reviewers.
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      58135f57
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      trivial: fix spelling in CONTEXT_TRACKING_FORCE help text · 99c8b1ea
      Paul Gortmaker 提交于
      Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      99c8b1ea
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      nohz: Convert a few places to use local per cpu accesses · e8fcaa5c
      Frederic Weisbecker 提交于
      A few functions use remote per CPU access APIs when they
      deal with local values.
      
      Just do the right conversion to improve performance, code
      readability and debug checks.
      
      While at it, lets extend some of these function names with *_this_cpu()
      suffix in order to display their purpose more clearly.
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      e8fcaa5c
  2. 30 11月, 2013 10 次提交
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      Linux 3.13-rc2 · dc1ccc48
      Linus Torvalds 提交于
      dc1ccc48
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      Merge tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64 · d5ff835f
      Linus Torvalds 提交于
      Pull ARM64 fixes from Catalin Marinas:
       - Remove preempt_count modifications in the arm64 IRQ handling code
         since that's already dealt with in generic irq_enter/irq_exit
       - PTE_PROT_NONE bit moved higher up to avoid overlapping with the
         hardware bits (for PROT_NONE mappings which are pte_present)
       - Big-endian fixes for ptrace support
       - Asynchronous aborts unmasking while in the kernel
       - pgprot_writecombine() change to create Normal NonCacheable memory
         rather than Device GRE
      
      * tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
        arm64: Move PTE_PROT_NONE higher up
        arm64: Use Normal NonCacheable memory for writecombine
        arm64: debug: make aarch32 bkpt checking endian clean
        arm64: ptrace: fix compat registes get/set to be endian clean
        arm64: Unmask asynchronous aborts when in kernel mode
        arm64: dts: Reserve the memory used for secondary CPU release address
        arm64: let the core code deal with preempt_count
      d5ff835f
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      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux · 033dbbde
      Linus Torvalds 提交于
      Pull s390 updates from Martin Schwidefsky:
       "One performance improvement and a few bug fixes.  Two of the fixes
        deal with the clock related problems we have seen on recent kernels"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
        s390/mm: handle asce-type exceptions as normal page fault
        s390,time: revert direct ktime path for s390 clockevent device
        s390/time,vdso: convert to the new update_vsyscall interface
        s390/uaccess: add missing page table walk range check
        s390/mm: optimize copy_page
        s390/dasd: validate request size before building CCW/TCW request
        s390/signal: always restore saved runtime instrumentation psw bit
      033dbbde
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      Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · dc418f6e
      Linus Torvalds 提交于
      Pull i2c fixes from Wolfram Sang:
       "Some easy but needed fixes for i2c drivers since rc1"
      
      * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
        i2c: bcm2835: Linking platform nodes to adapter nodes
        i2c: omap: raw read and write endian fix
        i2c: i2c-bcm-kona: Fix module build
        i2c: i2c-diolan-u2c: different usb endpoints for DLN-2-U2C
        i2c: bcm-kona: remove duplicated include
        i2c: davinci: raw read and write endian fix
      dc418f6e
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      Merge branch 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq · 7224b31b
      Linus Torvalds 提交于
      Pull workqueue fixes from Tejun Heo:
       "This contains one important fix.  The NUMA support added a while back
        broke ordering guarantees on ordered workqueues.  It was enforced by
        having single frontend interface with @max_active == 1 but the NUMA
        support puts multiple interfaces on unbound workqueues on NUMA
        machines thus breaking the ordered guarantee.  This is fixed by
        disabling NUMA support on ordered workqueues.
      
        The above and a couple other patches were sitting in for-3.12-fixes
        but I forgot to push that out, so they ended up waiting a bit too
        long.  My aplogies.
      
        Other fixes are minor"
      
      * 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
        workqueue: fix pool ID allocation leakage and remove BUILD_BUG_ON() in init_workqueues
        workqueue: fix comment typo for __queue_work()
        workqueue: fix ordered workqueues in NUMA setups
        workqueue: swap set_cpus_allowed_ptr() and PF_NO_SETAFFINITY
      7224b31b
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      Merge branch 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata · de92a058
      Linus Torvalds 提交于
      Pull libata fixes from Tejun Heo:
       "libata device removal path was removing parent device node before its
        child, which is mostly harmless but triggers warning after recent
        sysfs changes.  Rafael's patch fixes the order.
      
        Other than that, minor controller-specific fixes and device ID
        additions"
      
      * 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
        ATA: Fix port removal ordering
        ahci: add Marvell 9230 to the AHCI PCI device list
        ata: fix acpi_bus_get_device() return value check
        pata_arasan_cf: add missing clk_disable_unprepare() on error path
        ahci: add support for IBM Akebono platform device
      de92a058
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      Merge branch 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup · 2855987d
      Linus Torvalds 提交于
      Pull cgroup fixes from Tejun Heo:
       "Fixes for three issues.
      
         - cgroup destruction path could swamp system_wq possibly leading to
           deadlock.  This actually seems to happen in the wild with memcg
           because memcg destruction path adds nested dependency on system_wq.
      
           Resolved by isolating cgroup destruction work items on its
           dedicated workqueue.
      
         - Possible locking context deadlock through seqcount reported by
           lockdep
      
         - Memory leak under certain conditions"
      
      * 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
        cgroup: fix cgroup_subsys_state leak for seq_files
        cpuset: Fix memory allocator deadlock
        cgroup: use a dedicated workqueue for cgroup destruction
      2855987d
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      Merge tag 'sound-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · b8495995
      Linus Torvalds 提交于
      Pull sound fixes from Takashi Iwai:
       "Quite a few HD-Audio fixes, a WUSB audio fix and a fix for FireWire
        audio.  The HD-audio part contains a couple of fixes for the generic
        parser, and these are the only intrusive fixes.  The rest are mostly
        device-specific fixes"
      
      * tag 'sound-3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
        ALSA: hda - Add LFE chmap to ASUS ET2700
        ALSA: hda - Initialize missing bass speaker pin for ASUS AIO ET2700
        ALSA: hda - limit mic boost on Asus UX31[A,E]
        ALSA: hda - Check leaf nodes to find aamix amps
        ALSA: hda - Fix hp-mic mode without VREF bits
        ALSA: hda - Create Headhpone Mic Jack Mode when really needed
        ALSA: usb: use multiple packets per urb for Wireless USB inbound audio
        ALSA: hda - Enable mute/mic-mute LEDs for more Thinkpads with Conexant codec
        ALSA: hda - Drop bus->avoid_link_reset flag
        ALSA: hda/realtek - Set pcbeep amp for ALC668
        ALSA: hda/realtek - Add support of ALC231 codec
        ALSA: firewire-lib: fix wrong value for FDF field as an empty packet
      b8495995
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      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · b01537bf
      Linus Torvalds 提交于
      Pull vfs dentry reference count fix from Al Viro.
      
      This fixes a possible inode_permission NULL pointer dereference (and
      other problems) that were due to the root dentry count being decremented
      too much.  In commit 48a066e7 ("RCU'd vfsmounts") the placement of
      clearing the LOOKUP_RCU bit changed, and we then returned failure of
      incrementing the lockref on the parent dentry with LOOKUP_RCU cleared.
      
      But that meant we needed to go through the same cleanup routines that
      the later failures did wrt LOOKUP_ROOT and nd->root.
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        fix bogus path_put() of nd->root after some unlazy_walk() failures
      b01537bf
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      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · 282c183b
      Linus Torvalds 提交于
      Pull drm qxl leak fix from Dave Airlie:
       "As usual 5 mins after I send a trivial pull fix I find a real bug!
      
        This fixes a memory leak and I'd like to get it into stable queue
        asap"
      
      * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
        drm/qxl: fix memory leak in release list handling
      282c183b
  3. 29 11月, 2013 10 次提交
  4. 28 11月, 2013 14 次提交