1. 29 Feb, 2016 5 commits
  2. 10 Feb, 2016 5 commits
  3. 09 Feb, 2016 3 commits
  4. 04 Feb, 2016 4 commits
    • Jan Kara's avatar
      cfq-iosched: Allow parent cgroup to preempt its child · 3984aa55
      Jan Kara authored
      Currently we don't allow sync workload of one cgroup to preempt sync
      workload of any other cgroup. This is because we want to achieve service
      separation between cgroups. However in cases where cgroup preempting is
      ancestor of the current cgroup, there is no need of separation and
      idling introduces unnecessary overhead. This hurts for example the case
      when workload is isolated within a cgroup but journalling threads are in
      root cgroup. Simple way to demostrate the issue is using:
      
      dbench4 -c /usr/share/dbench4/client.txt -t 10 -D /mnt 1
      
      on ext4 filesystem on plain SATA drive (mounted with barrier=0 to make
      difference more visible). When all processes are in the root cgroup,
      reported throughput is 153.132 MB/sec. When dbench process gets its own
      blkio cgroup, reported throughput drops to 26.1006 MB/sec.
      
      Fix the problem by making check in cfq_should_preempt() more benevolent
      and allow preemption by ancestor cgroup. This improves the throughput
      reported by dbench4 to 48.9106 MB/sec.
      Acked-by: default avatarTejun Heo <tj@kernel.org>
      Signed-off-by: default avatarJan Kara <jack@suse.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      3984aa55
    • Jan Kara's avatar
      cfq-iosched: Allow sync noidle workloads to preempt each other · a257ae3e
      Jan Kara authored
      The original idea with preemption of sync noidle queues (introduced in
      commit 718eee05 "cfq-iosched: fairness for sync no-idle queues") was
      that we service all sync noidle queues together, we don't idle on any of
      the queues individually and we idle only if there is no sync noidle
      queue to be served. This intention also matches the original test:
      
      	if (cfqd->serving_type == SYNC_NOIDLE_WORKLOAD
      	   && new_cfqq->service_tree == cfqq->service_tree)
      		return true;
      
      However since at that time cfqq->service_tree was not set for idling
      queues, this test was unreliable and was replaced in commit e4a22919
      "cfq-iosched: fix no-idle preemption logic" by:
      
      	if (cfqd->serving_type == SYNC_NOIDLE_WORKLOAD &&
      	    cfqq_type(new_cfqq) == SYNC_NOIDLE_WORKLOAD &&
      	    new_cfqq->service_tree->count == 1)
      		return true;
      
      That was a reliable test but was actually doing something different -
      now we preempt sync noidle queue only if the new queue is the only one
      busy in the service tree.
      
      These days cfq queue is kept in service tree even if it is idling and
      thus the original check would be safe again. But since we actually check
      that cfq queues are in the same cgroup, of the same priority class and
      workload type (sync noidle), we know that new_cfqq is fine to preempt
      cfqq. So just remove the service tree check.
      Acked-by: default avatarTejun Heo <tj@kernel.org>
      Signed-off-by: default avatarJan Kara <jack@suse.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      a257ae3e
    • Jan Kara's avatar
      cfq-iosched: Reorder checks in cfq_should_preempt() · 6c80731c
      Jan Kara authored
      Move check for preemption by rt class up. There is no functional change
      but it makes arguing about conditions simpler since we can be sure both
      cfq queues are from the same ioprio class.
      Acked-by: default avatarTejun Heo <tj@kernel.org>
      Signed-off-by: default avatarJan Kara <jack@suse.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      6c80731c
    • Jan Kara's avatar
      cfq-iosched: Don't group_idle if cfqq has big thinktime · e795421e
      Jan Kara authored
      There is no point in idling on a cfq group if the only cfq queue that is
      there has too big thinktime.
      Signed-off-by: default avatarJan Kara <jack@suse.com>
      Acked-by: default avatarTejun Heo <tj@kernel.org>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      e795421e
  5. 01 Feb, 2016 7 commits
    • Linus Torvalds's avatar
      Linux 4.5-rc2 · 36f90b0a
      Linus Torvalds authored
      36f90b0a
    • Linus Torvalds's avatar
      Merge tag 'usb-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · d784ef58
      Linus Torvalds authored
      Pull USB driver fixes from Greg KH:
       "Here are some small USB fixes and new device ids for 4.5-rc2.  Nothing
        major here, full details are in the shortlog, and all of these have
        been in linux-next successfully"
      
      * tag 'usb-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
        USB: option: fix Cinterion AHxx enumeration
        USB: mxu11x0: fix memory leak on usb_serial private data
        USB: serial: ftdi_sio: add support for Yaesu SCU-18 cable
        USB: serial: option: Adding support for Telit LE922
        USB: serial: visor: fix crash on detecting device without write_urbs
        USB: visor: fix null-deref at probe
        USB: cp210x: add ID for IAI USB to RS485 adaptor
        usb: hub: do not clear BOS field during reset device
        cdc-acm:exclude Samsung phone 04e8:685d
        usb: cdc-acm: send zero packet for intel 7260 modem
        usb: cdc-acm: handle unlinked urb in acm read callback
      d784ef58
    • Linus Torvalds's avatar
      Merge tag 'tty-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · 54e3f3e3
      Linus Torvalds authored
      Pull tty/serial fixes from Greg KH:
       "Here are some small tty/serial driver fixes for 4.5-rc2.
      
        They resolve a number of reported problems (the ioctl one specifically
        has been pointed out by numerous people) and one patch adds some new
        device ids for the 8250_pci driver.  All have been in linux-next
        successfully"
      
      * tag 'tty-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        serial: 8250_pci: Add Intel Broadwell ports
        staging/speakup: Use tty_ldisc_ref() for paste kworker
        n_tty: Fix unsafe reference to "other" ldisc
        tty: Fix unsafe ldisc reference via ioctl(TIOCGETD)
        tty: Retry failed reopen if tty teardown in-progress
        tty: Wait interruptibly for tty lock on reopen
      54e3f3e3
    • Linus Torvalds's avatar
      Merge tag 'staging-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · 8c4e378e
      Linus Torvalds authored
      Pull staging fixes from Greg KH:
       "Here are some small staging driver fixes for 4.5-rc2.
      
        One of them predated 4.4-final, but I missed that merge window due to
        the holliday.  The others fix reported issues that have come up
        recently.  The tty change is needed for the speakup driver fix and has
        the ack of the tty driver maintainer as well, i.e.  myself :)
      
        All have been in linux-next with no reported issues"
      
      * tag 'staging-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
        Staging: speakup: fix read scrolled-back VT
        Staging: speakup: Fix getting port information
        Revert "Staging: panel: usleep_range is preferred over udelay"
        iio: adis_buffer: Fix out-of-bounds memory access
      8c4e378e
    • Linus Torvalds's avatar
      Merge tag 'driver-core-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core · f3ca903f
      Linus Torvalds authored
      Pull driver core fix from Greg KH:
       "Here's a single driver core fix that resolves an issue a lot of users
        have been hitting for a while now.  It's been tested a lot and has
        been in linux-next successfully for a while"
      
      * tag 'driver-core-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
        base/platform: Fix platform drivers with no probe callback
      f3ca903f
    • Linus Torvalds's avatar
      Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus · 510ae0c9
      Linus Torvalds authored
      Pull MIPS fix from Ralf Baechle:
       "Just a single revert for a patch which I had upstreamed out of
        sequence"
      
      * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
        Revert "MIPS: bcm63xx: nvram: Remove unused bcm63xx_nvram_get_psi_size() function"
      510ae0c9
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · d517be5f
      Linus Torvalds authored
      Pull x86 fixes from Thomas Gleixner:
       "A bit on the largish side due to a series of fixes for a regression in
        the x86 vector management which was introduced in 4.3.  This work was
        started in December already, but it took some time to fix all corner
        cases and a couple of older bugs in that area which were detected
        while at it
      
        Aside of that a few platform updates for intel-mid, quark and UV and
        two fixes for in the mm code:
         - Use proper types for pgprot values to avoid truncation
         - Prevent a size truncation in the pageattr code when setting page
           attributes for large mappings"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
        x86/mm/pat: Avoid truncation when converting cpa->numpages to address
        x86/mm: Fix types used in pgprot cacheability flags translations
        x86/platform/quark: Print boundaries correctly
        x86/platform/UV: Remove EFI memmap quirk for UV2+
        x86/platform/intel-mid: Join string and fix SoC name
        x86/platform/intel-mid: Enable 64-bit build
        x86/irq: Plug vector cleanup race
        x86/irq: Call irq_force_move_complete with irq descriptor
        x86/irq: Remove outgoing CPU from vector cleanup mask
        x86/irq: Remove the cpumask allocation from send_cleanup_vector()
        x86/irq: Clear move_in_progress before sending cleanup IPI
        x86/irq: Remove offline cpus from vector cleanup
        x86/irq: Get rid of code duplication
        x86/irq: Copy vectormask instead of an AND operation
        x86/irq: Check vector allocation early
        x86/irq: Reorganize the search in assign_irq_vector
        x86/irq: Reorganize the return path in assign_irq_vector
        x86/irq: Do not use apic_chip_data.old_domain as temporary buffer
        x86/irq: Validate that irq descriptor is still active
        x86/irq: Fix a race in x86_vector_free_irqs()
        ...
      d517be5f
  6. 31 Jan, 2016 8 commits
  7. 30 Jan, 2016 5 commits
    • Zhen Lei's avatar
      pid: Fix spelling in comments · 840d6fe7
      Zhen Lei authored
      Accidentally discovered this typo when I studied this module.
      Signed-off-by: default avatarZhen Lei <thunder.leizhen@huawei.com>
      Cc: Hanjun Guo <guohanjun@huawei.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Tianhong Ding <dingtianhong@huawei.com>
      Cc: Xinwei Hu <huxinwei@huawei.com>
      Cc: Zefan Li <lizefan@huawei.com>
      Link: http://lkml.kernel.org/r/1454119457-11272-1-git-send-email-thunder.leizhen@huawei.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      840d6fe7
    • Ingo Molnar's avatar
      Merge tag 'perf-urgent-for-mingo' of... · 28fb8a5b
      Ingo Molnar authored
      Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
      
      Pull perf/urgent fixes from Arnaldo Carvalho de Melo:
      
       - Fix 'perf stat' stddev reporting due to mistakenly cleaning event
         private stats (Jiri Olsa)
      
       - Fix 'perf test CQM' endless loop detected by 'gcc6 -Wmisleading-indentation'
         (Markus Trippelsdorf)
      
       - Fix behaviour of Shift-Tab when nothing is focussed in the annotate TUI browser,
         detected with gcc6 -Wmisleading-indentation (Markus Trippelsdorf)
      
       - Fix mem data cacheline hists browser width setting for unresolved
         addresses (Jiri Olsa)
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      28fb8a5b
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm · ad0b40fa
      Linus Torvalds authored
      Pull ARM fixes from Russell King:
       "Just one fix for a -fstack-protector-strong problem from Kees Cook,
        and adding the new copy_file_range syscall"
      
      * 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
        ARM: wire up copy_file_range() syscall
        ARM: 8500/1: fix atags_to_fdt with stack-protector-strong
      ad0b40fa
    • Linus Torvalds's avatar
      Merge tag 'powerpc-4.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · ec1cc55d
      Linus Torvalds authored
      Pull powerpc fixes from Michael Ellerman:
       - Wire up copy_file_range() syscall from Chandan Rajendra
       - Simplify module TOC handling from Alan Modra
       - Remove newly added extra definition of pmd_dirty from Stephen Rothwell
       - Allow user space to map rtas_rmo_buf from Vasant Hegde
       - Fix PE location code from Gavin Shan
       - Remove PPMU_HAS_SSLOT flag for Power8 from Madhavan Srinivasan
       - Fixup _HPAGE_CHG_MASK from Aneesh Kumar K.V
      
      * tag 'powerpc-4.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/mm: Fixup _HPAGE_CHG_MASK
        powerpc/perf: Remove PPMU_HAS_SSLOT flag for Power8
        powerpc/eeh: Fix PE location code
        powerpc/mm: Allow user space to map rtas_rmo_buf
        powerpc: Remove newly added extra definition of pmd_dirty
        powerpc: Simplify module TOC handling
        powerpc: Wire up copy_file_range() syscall
      ec1cc55d
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux · 6b292a8a
      Linus Torvalds authored
      Pull s390 updates from Martin Schwidefsky:
       "An optimization for irq-restore, the SSM instruction is quite a bit
        slower than an if-statement and a STOSM.
      
        The copy_file_range system all is added.
      
        Cleanup for PCI and CIO.
      
        And a couple of bug fixes"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
        s390/cio: update measurement characteristics
        s390/cio: ensure consistent measurement state
        s390/cio: fix measurement characteristics memleak
        s390/zcrypt: Fix cryptographic device id in kernel messages
        s390/pci: remove iomap sanity checks
        s390/pci: set error state for unusable functions
        s390/pci: fix bar check
        s390/pci: resize iomap
        s390/pci: improve ZPCI_* macros
        s390/pci: provide ZPCI_ADDR macro
        s390/pci: adjust IOMAP_MAX_ENTRIES
        s390/numa: move numa_init_late() from device to arch_initcall
        s390: remove all usages of PSW_ADDR_INSN
        s390: remove all usages of PSW_ADDR_AMODE
        s390: wire up copy_file_range syscall
        s390: remove superfluous memblock_alloc() return value checks
        s390/numa: allocate memory with correct alignment
        s390/irqflags: optimize irq restore
        s390/mm: use TASK_MAX_SIZE where applicable
      6b292a8a
  8. 29 Jan, 2016 3 commits
    • Linus Torvalds's avatar
      Merge branch 'for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · d3f71ae7
      Linus Torvalds authored
      Pull btrfs fixes from Chris Mason:
       "Dave had a small collection of fixes to the new free space tree code,
        one of which was keeping our sysfs files more up to date with feature
        bits as different things get enabled (lzo, raid5/6, etc).
      
        I should have kept the sysfs stuff for rc3, since we always manage to
        trip over something.  This time it was GFP_KERNEL from somewhere that
        is NOFS only.  Instead of rebasing it out I've put a revert in, and
        we'll fix it properly for rc3.
      
        Otherwise, Filipe fixed a btrfs DIO race and Qu Wenruo fixed up a
        use-after-free in our tracepoints that Dave Jones reported"
      
      * 'for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
        Revert "btrfs: synchronize incompat feature bits with sysfs files"
        btrfs: don't use GFP_HIGHMEM for free-space-tree bitmap kzalloc
        btrfs: sysfs: check initialization state before updating features
        Revert "btrfs: clear PF_NOFREEZE in cleaner_kthread()"
        btrfs: async-thread: Fix a use-after-free error for trace
        Btrfs: fix race between fsync and lockless direct IO writes
        btrfs: add free space tree to the cow-only list
        btrfs: add free space tree to lockdep classes
        btrfs: tweak free space tree bitmap allocation
        btrfs: tests: switch to GFP_KERNEL
        btrfs: synchronize incompat feature bits with sysfs files
        btrfs: sysfs: introduce helper for syncing bits with sysfs files
        btrfs: sysfs: add free-space-tree bit attribute
        btrfs: sysfs: fix typo in compat_ro attribute definition
      d3f71ae7
    • Linus Torvalds's avatar
      Merge tag 'pm+acpi-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 46552e68
      Linus Torvalds authored
      Pull power management and ACPI fixes from Rafael Wysocki:
       "These are: cpuidle fixes (including one fix for a recent regression),
        cpufreq fixes (including fixes for two issues introduced during the
        4.2 cycle), generic power domains framework fixes (two locking fixes
        and one cleanup), one locking fix in the ACPI-based PCI hotplug
        framework (ACPIPHP), removal of one ACPI backlight blacklist entry
        that isn't necessary any more and a PM Kconfig cleanup.
      
        Specifics:
      
         - Fix a recent cpuidle core regression that broke suspend-to-idle on
           all systems where cpuidle drivers don't provide ->enter_freeze
           callbacks for any states (Sudeep Holla).
      
         - Drop an unnecessary symbol definition from the cpuidle core code
           handling coupled CPU cores (Anders Roxell).
      
         - Fix a race condition related to governor initialization and removal
           in the cpufreq core (Viresh Kumar).
      
         - Clean up the cpufreq core to use list_is_last() for checking if the
           given policy object is the last element of a list instead of open
           coding that in a clumsy way (Gautham R Shenoy).
      
         - Fix compiler warnings in the pxa2xx and cpufreq-dt cpufreq drivers
           (Arnd Bergmann).
      
         - Fix two locking issues and clean up a comment in the generic power
           domains framework (Ulf Hansson, Marek Szyprowski, Moritz Fischer).
      
         - Fix the error code path of one function in the ACPI-based PCI
           hotplug framework (ACPIPHP) that forgets to release a lock acquired
           previously (Insu Yun).
      
         - Drop the ACPI backlight blacklist entry for Dell Inspiron 5737 that
           is not necessary any more (Hans de Goede).
      
         - Clean up the top-level PM Kconfig to stop requiring APM emulation
           to depend on PM which in fact isn't necessary (Arnd Bergmann)"
      
      * tag 'pm+acpi-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        cpufreq: cpufreq-dt: avoid uninitialized variable warnings:
        cpufreq: pxa2xx: fix pxa_cpufreq_change_voltage prototype
        PM: APM_EMULATION does not depend on PM
        cpufreq: Use list_is_last() to check last entry of the policy list
        cpufreq: Fix NULL reference crash while accessing policy->governor_data
        cpuidle: coupled: remove unused define cpuidle_coupled_lock
        PM / Domains: Fix typo in comment
        PM / Domains: Fix potential deadlock while adding/removing subdomains
        ACPI / PCI / hotplug: unlock in error path in acpiphp_enable_slot()
        ACPI: Revert "ACPI / video: Add Dell Inspiron 5737 to the blacklist"
        cpuidle: fix fallback mechanism for suspend to idle in absence of enter_freeze
        PM / domains: fix lockdep issue for all subdomains
      46552e68
    • Linus Torvalds's avatar
      Merge branch 'stable/for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb · ad233aca
      Linus Torvalds authored
      Pull swiotlb patchlet from Konrad Rzeszutek Wilk:
       "One trivial patch.
      
        Another patch (from Fengguang) is already in your tree courtesy of
        Andrew Morton - but I would prefer not to rebase my tree.  Hence the
        diff is very small"
      
      * 'stable/for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb:
        swiotlb: Make linux/swiotlb.h standalone includible
        MAINTAINERS: add git URL for swiotlb
      ad233aca