1. 31 Mar, 2013 10 commits
    • Viresh Kumar's avatar
      cpufreq: ondemand: Don't update sample_type if we don't evaluate load again · 9d445920
      Viresh Kumar authored
      Because we have per cpu timer now, we check if we need to evaluate load again or
      not (In case it is recently evaluated). Here the 2nd cpu which got timer
      interrupt updates core_dbs_info->sample_type irrespective of load evaluation is
      required or not. Which is wrong as the first cpu is dependent on this variable
      set to an older value.
      
      Moreover it would be best in this case to schedule 2nd cpu's timer to
      sampling_rate instead of freq_lo or hi as that must be managed by the other cpu.
      In case the other cpu idles in between then also we wouldn't loose much power.
      Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      9d445920
    • Viresh Kumar's avatar
      cpufreq: governor: Set MIN_LATENCY_MULTIPLIER to 20 · 98104ee2
      Viresh Kumar authored
      Currently MIN_LATENCY_MULTIPLIER is set defined as 100 and so on a system with
      transition latency of 1 ms, the minimum sampling time comes to be around 100 ms.
      That is quite big if you want to get better performance for your system.
      
      Redefine MIN_LATENCY_MULTIPLIER to 20 so that we can support 20ms sampling rate
      for such platforms.
      Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      98104ee2
    • Viresh Kumar's avatar
      cpufreq: governor: Implement per policy instances of governors · 4d5dcc42
      Viresh Kumar authored
      Currently, there can't be multiple instances of single governor_type.
      If we have a multi-package system, where we have multiple instances
      of struct policy (per package), we can't have multiple instances of
      same governor. i.e. We can't have multiple instances of ondemand
      governor for multiple packages.
      
      Governors directory in sysfs is created at /sys/devices/system/cpu/cpufreq/
      governor-name/. Which again reflects that there can be only one
      instance of a governor_type in the system.
      
      This is a bottleneck for multicluster system, where we want different
      packages to use same governor type, but with different tunables.
      
      This patch uses the infrastructure provided by earlier patch and
      implements init/exit routines for ondemand and conservative
      governors.
      Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      4d5dcc42
    • Viresh Kumar's avatar
      cpufreq: Add per policy governor-init/exit infrastructure · 7bd353a9
      Viresh Kumar authored
      Currently, there can't be multiple instances of single governor_type.
      If we have a multi-package system, where we have multiple instances
      of struct policy (per package), we can't have multiple instances of
      same governor. i.e. We can't have multiple instances of ondemand
      governor for multiple packages.
      
      Governors directory in sysfs is created at /sys/devices/system/cpu/cpufreq/
      governor-name/. Which again reflects that there can be only one
      instance of a governor_type in the system.
      
      This is a bottleneck for multicluster system, where we want different
      packages to use same governor type, but with different tunables.
      
      This patch is inclined towards providing this infrastructure. Because
      we are required to allocate governor's resources dynamically now, we
      must do it at policy creation and end. And so got
      CPUFREQ_GOV_POLICY_INIT/EXIT.
      Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      7bd353a9
    • Nathan Zimmer's avatar
      cpufreq: Convert the cpufreq_driver_lock to a rwlock · 0d1857a1
      Nathan Zimmer authored
      This eliminates the contention I am seeing in __cpufreq_cpu_get.
      It also nicely stages the lock to be replaced by the rcu.
      Signed-off-by: default avatarNathan Zimmer <nzimmer@sgi.com>
      Acked-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      0d1857a1
    • Linus Torvalds's avatar
      Linux 3.9-rc5 · 07961ac7
      Linus Torvalds authored
      07961ac7
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma · 0bb44280
      Linus Torvalds authored
      Pull slave-dmaengine fixes from Vinod Koul:
       "Two fixes for slave-dmaengine.
      
        The first one is for making slave_id value correct for dw_dmac and
        the other one fixes the endieness in DT parsing"
      
      * 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
        dw_dmac: adjust slave_id accordingly to request line base
        dmaengine: dw_dma: fix endianess for DT xlate function
      0bb44280
    • Linus Torvalds's avatar
      Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media · a7b436d3
      Linus Torvalds authored
      Pull media fixes from Mauro Carvalho Chehab:
       "For a some fixes for Kernel 3.9:
         - subsystem build fix when VIDEO_DEV=y, VIDEO_V4L2=m and I2C=m
         - compilation fix for arm multiarch preventing IR_RX51 to be selected
         - regression fix at bttv crop logic
         - s5p-mfc/m5mols/exynos: a few fixes for cameras on exynos hardware"
      
      * 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
        [media] [REGRESSION] bt8xx: Fix too large height in cropcap
        [media] fix compilation with both V4L2 and I2C as 'm'
        [media] m5mols: Fix bug in stream on handler
        [media] s5p-fimc: Do not attempt to disable not enabled media pipeline
        [media] s5p-mfc: Fix encoder control 15 issue
        [media] s5p-mfc: Fix frame skip bug
        [media] s5p-fimc: send valid m2m ctx to fimc_m2m_job_finish
        [media] exynos-gsc: send valid m2m ctx to gsc_m2m_job_finish
        [media] fimc-lite: Fix the variable type to avoid possible crash
        [media] fimc-lite: Initialize 'step' field in fimc_lite_ctrl structure
        [media] ir: IR_RX51 only works on OMAP2
      a7b436d3
    • Linus Torvalds's avatar
      Merge tag 'for-linus-20130331' of git://git.kernel.dk/linux-block · d299c290
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "Alright, this time from 10K up in the air.
      
        Collection of fixes that have been queued up since the merge window
        opened, hence postponed until later in the cycle.  The pull request
        contains:
      
         - A bunch of fixes for the xen blk front/back driver.
      
         - A round of fixes for the new IBM RamSan driver, fixing various
           nasty issues.
      
         - Fixes for multiple drives from Wei Yongjun, bad handling of return
           values and wrong pointer math.
      
         - A fix for loop properly killing partitions when being detached."
      
      * tag 'for-linus-20130331' of git://git.kernel.dk/linux-block: (25 commits)
        mg_disk: fix error return code in mg_probe()
        rsxx: remove unused variable
        rsxx: enable error return of rsxx_eeh_save_issued_dmas()
        block: removes dynamic allocation on stack
        Block: blk-flush: Fixed indent code style
        cciss: fix invalid use of sizeof in cciss_find_cfgtables()
        loop: cleanup partitions when detaching loop device
        loop: fix error return code in loop_add()
        mtip32xx: fix error return code in mtip_pci_probe()
        xen-blkfront: remove frame list from blk_shadow
        xen-blkfront: pre-allocate pages for requests
        xen-blkback: don't store dev_bus_addr
        xen-blkfront: switch from llist to list
        xen-blkback: fix foreach_grant_safe to handle empty lists
        xen-blkfront: replace kmalloc and then memcpy with kmemdup
        xen-blkback: fix dispatch_rw_block_io() error path
        rsxx: fix missing unlock on error return in rsxx_eeh_remap_dmas()
        Adding in EEH support to the IBM FlashSystem 70/80 device driver
        block: IBM RamSan 70/80 error message bug fix.
        block: IBM RamSan 70/80 branding changes.
        ...
      d299c290
    • Paul Walmsley's avatar
      Revert "lockdep: check that no locks held at freeze time" · dbf520a9
      Paul Walmsley authored
      This reverts commit 6aa97070.
      
      Commit 6aa97070 ("lockdep: check that no locks held at freeze time")
      causes problems with NFS root filesystems.  The failures were noticed on
      OMAP2 and 3 boards during kernel init:
      
        [ BUG: swapper/0/1 still has locks held! ]
        3.9.0-rc3-00344-ga937536b #1 Not tainted
        -------------------------------------
        1 lock held by swapper/0/1:
         #0:  (&type->s_umount_key#13/1){+.+.+.}, at: [<c011e84c>] sget+0x248/0x574
      
        stack backtrace:
          rpc_wait_bit_killable
          __wait_on_bit
          out_of_line_wait_on_bit
          __rpc_execute
          rpc_run_task
          rpc_call_sync
          nfs_proc_get_root
          nfs_get_root
          nfs_fs_mount_common
          nfs_try_mount
          nfs_fs_mount
          mount_fs
          vfs_kern_mount
          do_mount
          sys_mount
          do_mount_root
          mount_root
          prepare_namespace
          kernel_init_freeable
          kernel_init
      
      Although the rootfs mounts, the system is unstable.  Here's a transcript
      from a PM test:
      
        http://www.pwsan.com/omap/testlogs/test_v3.9-rc3/20130317194234/pm/37xxevm/37xxevm_log.txt
      
      Here's what the test log should look like:
      
        http://www.pwsan.com/omap/testlogs/test_v3.8/20130218214403/pm/37xxevm/37xxevm_log.txt
      
      Mailing list discussion is here:
      
        http://lkml.org/lkml/2013/3/4/221
      
      Deal with this for v3.9 by reverting the problem commit, until folks can
      figure out the right long-term course of action.
      Signed-off-by: default avatarPaul Walmsley <paul@pwsan.com>
      Cc: Mandeep Singh Baines <msb@chromium.org>
      Cc: Jeff Layton <jlayton@redhat.com>
      Cc: Shawn Guo <shawn.guo@linaro.org>
      Cc: <maciej.rutecki@gmail.com>
      Cc: Fengguang Wu <fengguang.wu@intel.com>
      Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Ben Chan <benchan@chromium.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Tejun Heo <tj@kernel.org>
      Cc: Rafael J. Wysocki <rjw@sisk.pl>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      dbf520a9
  2. 30 Mar, 2013 1 commit
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending · 13d2080d
      Linus Torvalds authored
      Pull SCSI target fixes from Nicholas Bellinger:
       "This includes the bug-fix for a >= v3.8-rc1 regression specific to
        iscsi-target persistent reservation conflict handling (CC'ed to
        stable), and a tcm_vhost patch to drop VIRTIO_RING_F_EVENT_IDX usage
        so that in-flight qemu vhost-scsi-pci device code can detect the
        proper vhost feature bits.
      
        Also, there are two more tcm_vhost patches still being discussed by
        MST and Asias for v3.9 that will be required for the in-flight qemu
        vhost-scsi-pci device patch to function properly, and that should
        (hopefully) be the last target fixes for this round."
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
        target: Fix RESERVATION_CONFLICT status regression for iscsi-target special case
        tcm_vhost: Avoid VIRTIO_RING_F_EVENT_IDX feature bit
      13d2080d
  3. 29 Mar, 2013 12 commits
  4. 28 Mar, 2013 17 commits