1. 20 Mar, 2017 5 commits
    • Linus Torvalds's avatar
      Linux 4.11-rc3 · 97da3854
      Linus Torvalds authored
      97da3854
    • Linus Torvalds's avatar
      mm/swap: don't BUG_ON() due to uninitialized swap slot cache · 452b94b8
      Linus Torvalds authored
      
      
      This BUG_ON() triggered for me once at shutdown, and I don't see a
      reason for the check.  The code correctly checks whether the swap slot
      cache is usable or not, so an uninitialized swap slot cache is not
      actually problematic afaik.
      
      I've temporarily just switched the BUG_ON() to a WARN_ON_ONCE(), since
      I'm not sure why that seemingly pointless check was there.  I suspect
      the real fix is to just remove it entirely, but for now we'll warn about
      it but not bring the machine down.
      
      Cc: "Huang, Ying" <ying.huang@intel.com>
      Cc: Tim Chen <tim.c.chen@linux.intel.com>
      Cc: Michal Hocko <mhocko@suse.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      452b94b8
    • Linus Torvalds's avatar
      Merge tag 'powerpc-4.11-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · a07a6e41
      Linus Torvalds authored
      Pull more powerpc fixes from Michael Ellerman:
       "A couple of minor powerpc fixes for 4.11:
      
         - wire up statx() syscall
      
         - don't print a warning on memory hotplug when HPT resizing isn't
           available
      
        Thanks to: David Gibson, Chandan Rajendra"
      
      * tag 'powerpc-4.11-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/pseries: Don't give a warning when HPT resizing isn't available
        powerpc: Wire up statx() syscall
      a07a6e41
    • Linus Torvalds's avatar
      Merge branch 'parisc-4.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux · 4571bc5a
      Linus Torvalds authored
      Pull parisc fixes from Helge Deller:
      
       - Mikulas Patocka added support for R_PARISC_SECREL32 relocations in
         modules with CONFIG_MODVERSIONS.
      
       - Dave Anglin optimized the cache flushing for vmap ranges.
      
       - Arvind Yadav provided a fix for a potential NULL pointer dereference
         in the parisc perf code (and some code cleanups).
      
       - I wired up the new statx system call, fixed some compiler warnings
         with the access_ok() macro and fixed shutdown code to really halt a
         system at shutdown instead of crashing & rebooting.
      
      * 'parisc-4.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
        parisc: Fix system shutdown halt
        parisc: perf: Fix potential NULL pointer dereference
        parisc: Avoid compiler warnings with access_ok()
        parisc: Wire up statx system call
        parisc: Optimize flush_kernel_vmap_range and invalidate_kernel_vmap_range
        parisc: support R_PARISC_SECREL32 relocation in modules
      4571bc5a
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending · 8aa34172
      Linus Torvalds authored
      Pull SCSI target fixes from Nicholas Bellinger:
       "The bulk of the changes are in qla2xxx target driver code to address
        various issues found during Cavium/QLogic's internal testing (stable
        CC's included), along with a few other stability and smaller
        miscellaneous improvements.
      
        There are also a couple of different patch sets from Mike Christie,
        which have been a result of his work to use target-core ALUA logic
        together with tcm-user backend driver.
      
        Finally, a patch to address some long standing issues with
        pass-through SCSI export of TYPE_TAPE + TYPE_MEDIUM_CHANGER devices,
        which will make folks using physical (or virtual) magnetic tape happy"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (28 commits)
        qla2xxx: Update driver version to 9.00.00.00-k
        qla2xxx: Fix delayed response to command for loop mode/direct connect.
        qla2xxx: Change scsi host lookup method.
        qla2xxx: Add DebugFS node to display Port Database
        qla2xxx: Use IOCB interface to submit non-critical MBX.
        qla2xxx: Add async new target notification
        qla2xxx: Export DIF stats via debugfs
        qla2xxx: Improve T10-DIF/PI handling in driver.
        qla2xxx: Allow relogin to proceed if remote login did not finish
        qla2xxx: Fix sess_lock & hardware_lock lock order problem.
        qla2xxx: Fix inadequate lock protection for ABTS.
        qla2xxx: Fix request queue corruption.
        qla2xxx: Fix memory leak for abts processing
        qla2xxx: Allow vref count to timeout on vport delete.
        tcmu: Convert cmd_time_out into backend device attribute
        tcmu: make cmd timeout configurable
        tcmu: add helper to check if dev was configured
        target: fix race during implicit transition work flushes
        target: allow userspace to set state to transitioning
        target: fix ALUA transition timeout handling
        ...
      8aa34172
  2. 19 Mar, 2017 15 commits
  3. 18 Mar, 2017 17 commits
    • Nicholas Bellinger's avatar
      tcmu: Convert cmd_time_out into backend device attribute · 7d7a7435
      Nicholas Bellinger authored
      
      
      Instead of putting cmd_time_out under ../target/core/user_0/foo/control,
      which has historically been used by parameters needed for initial
      backend device configuration, go ahead and move cmd_time_out into
      a backend device attribute.
      
      In order to do this, tcmu_module_init() has been updated to create
      a local struct configfs_attribute **tcmu_attrs, that is based upon
      the existing passthrough_attrib_attrs along with the new cmd_time_out
      attribute.  Once **tcm_attrs has been setup, go ahead and point
      it at tcmu_ops->tb_dev_attrib_attrs so it's picked up by target-core.
      
      Also following MNC's previous change, ->cmd_time_out is stored in
      milliseconds but exposed via configfs in seconds.  Also, note this
      patch restricts the modification of ->cmd_time_out to before +
      after the TCMU device has been configured, but not while it has
      active fabric exports.
      
      Cc: Mike Christie <mchristi@redhat.com>
      Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
      7d7a7435
    • Mike Christie's avatar
      tcmu: make cmd timeout configurable · af980e46
      Mike Christie authored
      
      
      A single daemon could implement multiple types of devices
      using multuple types of real devices that may not support
      restarting from crashes and/or handling tcmu timeouts. This
      makes the cmd timeout configurable, so handlers that do not
      support it can turn if off for now.
      Signed-off-by: default avatarMike Christie <mchristi@redhat.com>
      Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
      af980e46
    • Mike Christie's avatar
      tcmu: add helper to check if dev was configured · 972c7f16
      Mike Christie authored
      
      
      This adds a helper to check if the dev was configured. It
      will be used in the next patch to prevent updates to some
      config settings after the device has been setup.
      Signed-off-by: default avatarMike Christie <mchristi@redhat.com>
      Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
      972c7f16
    • Linus Torvalds's avatar
      Merge tag 'openrisc-for-linus' of git://github.com/openrisc/linux · 93afaa45
      Linus Torvalds authored
      Pull OpenRISC fixes from Stafford Horne:
       "OpenRISC fixes for build issues that were exposed by kbuild robots
        after 4.11 merge. All from allmodconfig builds. This includes:
      
         - bug in the handling of 8-byte get_user() calls
      
         - module build failure due to multile missing symbol exports"
      
      * tag 'openrisc-for-linus' of git://github.com/openrisc/linux:
        openrisc: Export symbols needed by modules
        openrisc: fix issue handling 8 byte get_user calls
        openrisc: xchg: fix `computed is not used` warning
      93afaa45
    • Mike Christie's avatar
      target: fix race during implicit transition work flushes · 760bf578
      Mike Christie authored
      
      
      This fixes the following races:
      
      1. core_alua_do_transition_tg_pt could have read
      tg_pt_gp_alua_access_state and gone into this if chunk:
      
      if (!explicit &&
              atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state) ==
                 ALUA_ACCESS_STATE_TRANSITION) {
      
      and then core_alua_do_transition_tg_pt_work could update the
      state. core_alua_do_transition_tg_pt would then only set
      tg_pt_gp_alua_pending_state and the tg_pt_gp_alua_access_state would
      not get updated with the second calls state.
      
      2. core_alua_do_transition_tg_pt could be setting
      tg_pt_gp_transition_complete while the tg_pt_gp_transition_work
      is already completing. core_alua_do_transition_tg_pt then waits on the
      completion that will never be called.
      
      To handle these issues, we just call flush_work which will return when
      core_alua_do_transition_tg_pt_work has completed so there is no need
      to do the complete/wait. And, if core_alua_do_transition_tg_pt_work
      was running, instead of trying to sneak in the state change, we just
      schedule up another core_alua_do_transition_tg_pt_work call.
      
      Note that this does not handle a possible race where there are multiple
      threads call core_alua_do_transition_tg_pt at the same time. I think
      we need a mutex in target_tg_pt_gp_alua_access_state_store.
      Signed-off-by: default avatarMike Christie <mchristi@redhat.com>
      Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
      760bf578
    • Mike Christie's avatar
      target: allow userspace to set state to transitioning · 1ca4d4fa
      Mike Christie authored
      
      
      Userspace target_core_user handlers like tcmu-runner may want to set the
      ALUA state to transitioning while it does implicit transitions. This
      patch allows that state when set from configfs.
      Signed-off-by: default avatarMike Christie <mchristi@redhat.com>
      Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
      1ca4d4fa
    • Mike Christie's avatar
      target: fix ALUA transition timeout handling · d7175373
      Mike Christie authored
      
      
      The implicit transition time tells initiators the min time
      to wait before timing out a transition. We currently schedule
      the transition to occur in tg_pt_gp_implicit_trans_secs
      seconds so there is no room for delays. If
      core_alua_do_transition_tg_pt_work->core_alua_update_tpg_primary_metadata
      needs to write out info to a remote file, then the initiator can
      easily time out the operation.
      Signed-off-by: default avatarMike Christie <mchristi@redhat.com>
      Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
      d7175373
    • Mike Christie's avatar
      target: Use system workqueue for ALUA transitions · 207ee841
      Mike Christie authored
      If tcmu-runner is processing a STPG and needs to change the kernel's
      ALUA state then we cannot use the same work queue for task management
      requests and ALUA transitions, because we could deadlock. The problem
      occurs when a STPG times out before tcmu-runner is able to
      call into target_tg_pt_gp_alua_access_state_store->
      core_alua_do_port_transition -> core_alua_do_transition_tg_pt ->
      queue_work. In this case, the tmr is on the work queue waiting for
      the STPG to complete, but the STPG transition is now queued behind
      the waiting tmr.
      
      Note:
      This bug will also be fixed by this patch:
      http://www.spinics.net/lists/target-devel/msg14560.html
      
      
      which switches the tmr code to use the system workqueues.
      
      For both, I am not sure if we need a dedicated workqueue since
      it is not a performance path and I do not think we need WQ_MEM_RECLAIM
      to make forward progress to free up memory like the block layer does.
      Signed-off-by: default avatarMike Christie <mchristi@redhat.com>
      Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
      207ee841
    • Mike Christie's avatar
      target: fail ALUA transitions for pscsi · 0a414572
      Mike Christie authored
      
      
      We do not setup the LU group for pscsi devices, so if you write
      a state to alua_access_state that will cause a transition you will
      get a NULL pointer dereference.
      
      This patch will fail attempts to try and transition the path
      for backend devices that set the TRANSPORT_FLAG_PASSTHROUGH_ALUA
      flag.
      Signed-off-by: default avatarMike Christie <mchristi@redhat.com>
      Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
      0a414572
    • Mike Christie's avatar
      target: allow ALUA setup for some passthrough backends · 530c6891
      Mike Christie authored
      
      
      This patch allows passthrough backends to use the core/base LIO
      ALUA setup and state checks, but still handle the execution of
      commands.
      
      This will allow the target_core_user module to execute STPG and RTPG
      in userspace, and not have to duplicate the ALUA state checks, path
      information (needed so we can check if command is executable on
      specific paths) and setup (rtslib sets/updates the configfs ALUA
      interface like it does for iblock or file).
      
      For STPG, the target_core_user userspace daemon, tcmu-runner will
      still execute the STPG, and to update the core/base LIO state it
      will use the existing configfs interface. For RTPG, tcmu-runner
      will loop over configfs and/or cache the state.
      Signed-off-by: default avatarMike Christie <mchristi@redhat.com>
      Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
      530c6891
    • Mike Christie's avatar
      tcmu: return on first Opt parse failure · 2579325c
      Mike Christie authored
      
      
      We only were returing failure if the last opt to be parsed failed.
      This has a return failure when we first detect a failure.
      Signed-off-by: default avatarMike Christie <mchristi@redhat.com>
      Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
      2579325c
    • Mike Christie's avatar
      tcmu: allow hw_max_sectors greater than 128 · 3abaa2bf
      Mike Christie authored
      
      
      tcmu hard codes the hw_max_sectors to 128 which is a litle small.
      Userspace uses the max_sectors to report the optimal IO size and
      some initiators perform better with larger IOs (open-iscsi seems
      to do better with 256 to 512 depending on the test).
      
      (Fix do not display hw max sectors twice - MNC)
      Signed-off-by: default avatarMike Christie <mchristi@redhat.com>
      Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
      3abaa2bf
    • Nicholas Bellinger's avatar
      target: Drop pointless tfo->check_stop_free check · 9c28ca4f
      Nicholas Bellinger authored
      
      
      All in-tree fabric drivers provide a tfo->check_stop_free(),
      so there is no need to do the extra check within existing
      transport_cmd_check_stop_to_fabric() code.
      
      Just to be sure, add a check in target_fabric_tf_ops_check()
      to notify any out-of-tree drivers that might be missing it.
      Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
      9c28ca4f
    • Helge Deller's avatar
      parisc: Fix system shutdown halt · 73580dac
      Helge Deller authored
      
      
      On those parisc machines which don't provide a software power off
      function, the system currently kills the init process at the end of a
      shutdown and unexpectedly restarts insteads of halting.
      Fix it by adding a loop which will not return.
      Signed-off-by: default avatarHelge Deller <deller@gmx.de>
      Cc: stable@vger.kernel.org # 4.9+
      73580dac
    • Arvind Yadav's avatar
      parisc: perf: Fix potential NULL pointer dereference · 74e3f6e6
      Arvind Yadav authored
      
      
      Fix potential NULL pointer dereference and clean up
      coding style errors (code indent, trailing whitespaces).
      Signed-off-by: default avatarArvind Yadav <arvind.yadav.cs@gmail.com>
      Signed-off-by: default avatarHelge Deller <deller@gmx.de>
      74e3f6e6
    • Linus Torvalds's avatar
      Merge branch 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 3e51f893
      Linus Torvalds authored
      Pull CPU hotplug fix from Thomas Gleixner:
       "A single fix preventing the concurrent execution of the CPU hotplug
        callback install/invocation machinery. Long standing bug caused by a
        massive brain slip of that Gleixner dude, which went unnoticed for
        almost a year"
      
      * 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        cpu/hotplug: Serialize callback invocations proper
      3e51f893
    • Linus Torvalds's avatar
      Merge tag 'pm-4.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 8d940990
      Linus Torvalds authored
      Pull power management fixes from Rafael Wysocki:
       "These fix a few more intel_pstate issues and one small issue in the
        cpufreq core.
      
        Specifics:
      
         - Fix breakage in the intel_pstate's debugfs interface for PID
           controller tuning (Rafael Wysocki)
      
         - Fix computations related to P-state limits in intel_pstate to avoid
           excessive rounding errors leading to visible inaccuracies (Srinivas
           Pandruvada, Rafael Wysocki)
      
         - Add a missing newline to a message printed by one function in the
           cpufreq core and clean up that function (Rafael Wysocki)"
      
      * tag 'pm-4.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        cpufreq: Fix and clean up show_cpuinfo_cur_freq()
        cpufreq: intel_pstate: Avoid percentages in limits-related computations
        cpufreq: intel_pstate: Correct frequency setting in the HWP mode
        cpufreq: intel_pstate: Update pid_params.sample_rate_ns in pid_param_set()
      8d940990
  4. 17 Mar, 2017 3 commits
    • Rafael J. Wysocki's avatar
      Merge branches 'pm-cpufreq-fixes' and 'intel_pstate-fixes' · 8b766e05
      Rafael J. Wysocki authored
      * pm-cpufreq-fixes:
        cpufreq: Fix and clean up show_cpuinfo_cur_freq()
      
      * intel_pstate-fixes:
        cpufreq: intel_pstate: Avoid percentages in limits-related computations
        cpufreq: intel_pstate: Correct frequency setting in the HWP mode
        cpufreq: intel_pstate: Update pid_params.sample_rate_ns in pid_param_set()
      8b766e05
    • Linus Torvalds's avatar
      Merge tag 'nfs-for-4.11-2' of git://git.linux-nfs.org/projects/anna/linux-nfs · 8841b5f0
      Linus Torvalds authored
      Pull NFS client fixes from Anna Schumaker:
       "We have a handful of stable fixes to fix kernel warnings and other
        bugs that have been around for a while. We've also found a few other
        reference counting bugs and memory leaks since the initial 4.11 pull.
      
        Stable Bugfixes:
         - Fix decrementing nrequests in NFS v4.2 COPY to fix kernel warnings
         - Prevent a double free in async nfs4_exchange_id()
         - Squelch a kbuild sparse complaint for xprtrdma
      
        Other Bugfixes:
         - Fix a typo (NFS_ATTR_FATTR_GROUP_NAME) that causes a memory leak
         - Fix a reference leak that causes kernel warnings
         - Make nfs4_cb_sv_ops static to fix a sparse warning
         - Respect a server's max size in CREATE_SESSION
         - Handle errors from nfs4_pnfs_ds_connect
         - Flexfiles layout shouldn't mark devices as unavailable"
      
      * tag 'nfs-for-4.11-2' of git://git.linux-nfs.org/projects/anna/linux-nfs:
        pNFS/flexfiles: never nfs4_mark_deviceid_unavailable
        pNFS: return status from nfs4_pnfs_ds_connect
        NFSv4.1 respect server's max size in CREATE_SESSION
        NFS prevent double free in async nfs4_exchange_id
        nfs: make nfs4_cb_sv_ops static
        xprtrdma: Squelch kbuild sparse complaint
        NFS: fix the fault nrequests decreasing for nfs_inode COPY
        NFSv4: fix a reference leak caused WARNING messages
        nfs4: fix a typo of NFS_ATTR_FATTR_GROUP_NAME
      8841b5f0
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · eab60d4e
      Linus Torvalds authored
      Pull x86 fixes from Thomas Gleixner:
       "An assorted pile of fixes along with some hardware enablement:
      
         - a fix for a KASAN / branch profiling related boot failure
      
         - some more fallout of the PUD rework
      
         - a fix for the Always Running Timer which is not initialized when
           the TSC frequency is known at boot time (via MSR/CPUID)
      
         - a resource leak fix for the RDT filesystem
      
         - another unwinder corner case fixup
      
         - removal of the warning for duplicate NMI handlers because there are
           legitimate cases where more than one handler can be registered at
           the last level
      
         - make a function static - found by sparse
      
         - a set of updates for the Intel MID platform which got delayed due
           to merge ordering constraints. It's hardware enablement for a non
           mainstream platform, so there is no risk"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/mpx: Make unnecessarily global function static
        x86/intel_rdt: Put group node in rdtgroup_kn_unlock
        x86/unwind: Fix last frame check for aligned function stacks
        mm, x86: Fix native_pud_clear build error
        x86/kasan: Fix boot with KASAN=y and PROFILE_ANNOTATED_BRANCHES=y
        x86/platform/intel-mid: Add power button support for Merrifield
        x86/platform/intel-mid: Use common power off sequence
        x86/platform: Remove warning message for duplicate NMI handlers
        x86/tsc: Fix ART for TSC_KNOWN_FREQ
        x86/platform/intel-mid: Correct MSI IRQ line for watchdog device
      eab60d4e