1. 25 Sep, 2013 6 commits
    • Andrew Morton's avatar
      revert "memcg, vmscan: do not attempt soft limit reclaim if it would not scan anything" · 3120055e
      Andrew Morton authored
      Revert commit e839b6a1 ("memcg, vmscan: do not attempt soft limit
      reclaim if it would not scan anything")
      
      I merged this prematurely - Michal and Johannes still disagree about the
      overall design direction and the future remains unclear.
      
      Cc: Michal Hocko <mhocko@suse.cz>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      3120055e
    • Andrew Morton's avatar
      revert "memcg: track all children over limit in the root" · 8f939a9f
      Andrew Morton authored
      Revert commit 1be171d6 ("memcg: track all children over limit in the
      root")
      
      I merged this prematurely - Michal and Johannes still disagree about the
      overall design direction and the future remains unclear.
      
      Cc: Michal Hocko <mhocko@suse.cz>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      8f939a9f
    • Andrew Morton's avatar
      revert "memcg, vmscan: do not fall into reclaim-all pass too quickly" · 20ba27f5
      Andrew Morton authored
      Revert commit e975de99 ("memcg, vmscan: do not fall into reclaim-all
      pass too quickly")
      
      I merged this prematurely - Michal and Johannes still disagree about the
      overall design direction and the future remains unclear.
      
      Cc: Michal Hocko <mhocko@suse.cz>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      20ba27f5
    • Goldwyn Rodrigues's avatar
      fs/ocfs2/super.c: use a bigger nodestr in ocfs2_dismount_volume · 99d7a882
      Goldwyn Rodrigues authored
      While printing 32-bit node numbers, an 8-byte string is not enough.
      Increase the size of the string to 12 chars.
      
      This got left out in commit 49fa8140 ("fs/ocfs2/super.c: Use bigger
      nodestr to accomodate 32-bit node numbers").
      Signed-off-by: default avatarGoldwyn Rodrigues <rgoldwyn@suse.com>
      Cc: Joel Becker <jlbec@evilplan.org>
      Cc: Mark Fasheh <mfasheh@suse.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      99d7a882
    • Michal Hocko's avatar
      watchdog: update watchdog_thresh properly · 9809b18f
      Michal Hocko authored
      watchdog_tresh controls how often nmi perf event counter checks per-cpu
      hrtimer_interrupts counter and blows up if the counter hasn't changed
      since the last check.  The counter is updated by per-cpu
      watchdog_hrtimer hrtimer which is scheduled with 2/5 watchdog_thresh
      period which guarantees that hrtimer is scheduled 2 times per the main
      period.  Both hrtimer and perf event are started together when the
      watchdog is enabled.
      
      So far so good.  But...
      
      But what happens when watchdog_thresh is updated from sysctl handler?
      
      proc_dowatchdog will set a new sampling period and hrtimer callback
      (watchdog_timer_fn) will use the new value in the next round.  The
      problem, however, is that nobody tells the perf event that the sampling
      period has changed so it is ticking with the period configured when it
      has been set up.
      
      This might result in an ear ripping dissonance between perf and hrtimer
      parts if the watchdog_thresh is increased.  And even worse it might lead
      to KABOOM if the watchdog is configured to panic on such a spurious
      lockup.
      
      This patch fixes the issue by updating both nmi perf even counter and
      hrtimers if the threshold value has changed.
      
      The nmi one is disabled and then reinitialized from scratch.  This has
      an unpleasant side effect that the allocation of the new event might
      fail theoretically so the hard lockup detector would be disabled for
      such cpus.  On the other hand such a memory allocation failure is very
      unlikely because the original event is deallocated right before.
      
      It would be much nicer if we just changed perf event period but there
      doesn't seem to be any API to do that right now.  It is also unfortunate
      that perf_event_alloc uses GFP_KERNEL allocation unconditionally so we
      cannot use on_each_cpu() and do the same thing from the per-cpu context.
      The update from the current CPU should be safe because
      perf_event_disable removes the event atomically before it clears the
      per-cpu watchdog_ev so it cannot change anything under running handler
      feet.
      
      The hrtimer is simply restarted (thanks to Don Zickus who has pointed
      this out) if it is queued because we cannot rely it will fire&adopt to
      the new sampling period before a new nmi event triggers (when the
      treshold is decreased).
      
      [akpm@linux-foundation.org: the UP version of __smp_call_function_single ended up in the wrong place]
      Signed-off-by: default avatarMichal Hocko <mhocko@suse.cz>
      Acked-by: default avatarDon Zickus <dzickus@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Fabio Estevam <festevam@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      9809b18f
    • Michal Hocko's avatar
      watchdog: update watchdog attributes atomically · 359e6fab
      Michal Hocko authored
      proc_dowatchdog doesn't synchronize multiple callers which might lead to
      confusion when two parallel callers might confuse watchdog_enable_all_cpus
      resp watchdog_disable_all_cpus (eg watchdog gets enabled even if
      watchdog_thresh was set to 0 already).
      
      This patch adds a local mutex which synchronizes callers to the sysctl
      handler.
      Signed-off-by: default avatarMichal Hocko <mhocko@suse.cz>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Acked-by: default avatarDon Zickus <dzickus@redhat.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@kernel.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      359e6fab
  2. 23 Sep, 2013 4 commits
    • Linus Torvalds's avatar
      Linux 3.12-rc2 · 4a10c2ac
      Linus Torvalds authored
      4a10c2ac
    • Linus Torvalds's avatar
      Merge tag 'staging-3.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · 9d23108d
      Linus Torvalds authored
      Pull staging fixes from Greg KH:
       "Here are a number of small staging tree and iio driver fixes.  Nothing
        major, just lots of little things"
      
      * tag 'staging-3.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (34 commits)
        iio:buffer_cb: Add missing iio_buffer_init()
        iio: Prevent race between IIO chardev opening and IIO device free
        iio: fix: Keep a reference to the IIO device for open file descriptors
        iio: Stop sampling when the device is removed
        iio: Fix crash when scan_bytes is computed with active_scan_mask == NULL
        iio: Fix mcp4725 dev-to-indio_dev conversion in suspend/resume
        iio: Fix bma180 dev-to-indio_dev conversion in suspend/resume
        iio: Fix tmp006 dev-to-indio_dev conversion in suspend/resume
        iio: iio_device_add_event_sysfs() bugfix
        staging: iio: ade7854-spi: Fix return value
        staging:iio:hmc5843: Fix measurement conversion
        iio: isl29018: Fix uninitialized value
        staging:iio:dummy fix kfifo_buf kconfig dependency issue if kfifo modular and buffer enabled for built in dummy driver.
        iio: at91: fix adc_clk overflow
        staging: line6: add bounds check in snd_toneport_source_put()
        Staging: comedi: Fix dependencies for drivers misclassified as PCI
        staging: r8188eu: Adjust RX gain
        staging: r8188eu: Fix smatch warning in core/rtw_ieee80211.
        staging: r8188eu: Fix smatch error in core/rtw_mlme_ext.c
        staging: r8188eu: Fix Smatch off-by-one warning in hal/rtl8188e_hal_init.c
        ...
      9d23108d
    • Linus Torvalds's avatar
      Merge tag 'usb-3.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · e04a0a5a
      Linus Torvalds authored
      Pull USB fixes from Greg KH:
       "Here are a number of small USB fixes for 3.12-rc2.
      
        One is a revert of a EHCI change that isn't quite ready for 3.12.
        Others are minor things, gadget fixes, Kconfig fixes, and some quirks
        and documentation updates.
      
        All have been in linux-next for a bit"
      
      * tag 'usb-3.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
        USB: pl2303: distinguish between original and cloned HX chips
        USB: Faraday fotg210: fix email addresses
        USB: fix typo in usb serial simple driver Kconfig
        Revert "USB: EHCI: support running URB giveback in tasklet context"
        usb: s3c-hsotg: do not disconnect gadget when receiving ErlySusp intr
        usb: s3c-hsotg: fix unregistration function
        usb: gadget: f_mass_storage: reset endpoint driver data when disabled
        usb: host: fsl-mph-dr-of: Staticize local symbols
        usb: gadget: f_eem: Staticize eem_alloc
        usb: gadget: f_ecm: Staticize ecm_alloc
        usb: phy: omap-usb3: Fix return value
        usb: dwc3: gadget: avoid memory leak when failing to allocate all eps
        usb: dwc3: remove extcon dependency
        usb: gadget: add '__ref' for rndis_config_register() and cdc_config_register()
        usb: dwc3: pci: add support for BayTrail
        usb: gadget: cdc2: fix conversion to new interface of f_ecm
        usb: gadget: fix a bug and a WARN_ON in dummy-hcd
        usb: gadget: mv_u3d_core: fix violation of locking discipline in mv_u3d_ep_disable()
      e04a0a5a
    • Linus Torvalds's avatar
      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · d8524ae9
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       - some small fixes for msm and exynos
       - a regression revert affecting nouveau users with old userspace
       - intel pageflip deadlock and gpu hang fixes, hsw modesetting hangs
      
      * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (22 commits)
        Revert "drm: mark context support as a legacy subsystem"
        drm/i915: Don't enable the cursor on a disable pipe
        drm/i915: do not update cursor in crtc mode set
        drm/exynos: fix return value check in lowlevel_buffer_allocate()
        drm/exynos: Fix address space warnings in exynos_drm_fbdev.c
        drm/exynos: Fix address space warning in exynos_drm_buf.c
        drm/exynos: Remove redundant OF dependency
        drm/msm: drop unnecessary set_need_resched()
        drm/i915: kill set_need_resched
        drm/msm: fix potential NULL pointer dereference
        drm/i915/dvo: set crtc timings again for panel fixed modes
        drm/i915/sdvo: Robustify the dtd<->drm_mode conversions
        drm/msm: workaround for missing irq
        drm/msm: return -EBUSY if bo still active
        drm/msm: fix return value check in ERR_PTR()
        drm/msm: fix cmdstream size check
        drm/msm: hangcheck harder
        drm/msm: handle read vs write fences
        drm/i915/sdvo: Fully translate sync flags in the dtd->mode conversion
        drm/i915: Use proper print format for debug prints
        ...
      d8524ae9
  3. 22 Sep, 2013 3 commits
    • Linus Torvalds's avatar
      Merge branch 'for-3.12/core' of git://git.kernel.dk/linux-block · 68cf8d0c
      Linus Torvalds authored
      Pull block IO fixes from Jens Axboe:
       "After merge window, no new stuff this time only a collection of neatly
        confined and simple fixes"
      
      * 'for-3.12/core' of git://git.kernel.dk/linux-block:
        cfq: explicitly use 64bit divide operation for 64bit arguments
        block: Add nr_bios to block_rq_remap tracepoint
        If the queue is dying then we only call the rq->end_io callout. This leaves bios setup on the request, because the caller assumes when the blk_execute_rq_nowait/blk_execute_rq call has completed that the rq->bios have been cleaned up.
        bio-integrity: Fix use of bs->bio_integrity_pool after free
        blkcg: relocate root_blkg setting and clearing
        block: Convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...)
        block: trace all devices plug operation
      68cf8d0c
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · 0fbf2cc9
      Linus Torvalds authored
      Pull btrfs fixes from Chris Mason:
       "These are mostly bug fixes and a two small performance fixes.  The
        most important of the bunch are Josef's fix for a snapshotting
        regression and Mark's update to fix compile problems on arm"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (25 commits)
        Btrfs: create the uuid tree on remount rw
        btrfs: change extent-same to copy entire argument struct
        Btrfs: dir_inode_operations should use btrfs_update_time also
        btrfs: Add btrfs: prefix to kernel log output
        btrfs: refuse to remount read-write after abort
        Btrfs: btrfs_ioctl_default_subvol: Revert back to toplevel subvolume when arg is 0
        Btrfs: don't leak transaction in btrfs_sync_file()
        Btrfs: add the missing mutex unlock in write_all_supers()
        Btrfs: iput inode on allocation failure
        Btrfs: remove space_info->reservation_progress
        Btrfs: kill delay_iput arg to the wait_ordered functions
        Btrfs: fix worst case calculator for space usage
        Revert "Btrfs: rework the overcommit logic to be based on the total size"
        Btrfs: improve replacing nocow extents
        Btrfs: drop dir i_size when adding new names on replay
        Btrfs: replay dir_index items before other items
        Btrfs: check roots last log commit when checking if an inode has been logged
        Btrfs: actually log directory we are fsync()'ing
        Btrfs: actually limit the size of delalloc range
        Btrfs: allocate the free space by the existed max extent size when ENOSPC
        ...
      0fbf2cc9
    • Anatol Pomozov's avatar
      cfq: explicitly use 64bit divide operation for 64bit arguments · f3cff25f
      Anatol Pomozov authored
      'samples' is 64bit operant, but do_div() second parameter is 32.
      do_div silently truncates high 32 bits and calculated result
      is invalid.
      
      In case if low 32bit of 'samples' are zeros then do_div() produces
      kernel crash.
      Signed-off-by: default avatarAnatol Pomozov <anatol.pomozov@gmail.com>
      Acked-by: default avatarTejun Heo <tj@kernel.org>
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      f3cff25f
  4. 21 Sep, 2013 27 commits