1. 07 2月, 2012 1 次提交
    • T
      block: strip out locking optimization in put_io_context() · 11a3122f
      Tejun Heo 提交于
      put_io_context() performed a complex trylock dancing to avoid
      deferring ioc release to workqueue.  It was also broken on UP because
      trylock was always assumed to succeed which resulted in unbalanced
      preemption count.
      
      While there are ways to fix the UP breakage, even the most
      pathological microbench (forced ioc allocation and tight fork/exit
      loop) fails to show any appreciable performance benefit of the
      optimization.  Strip it out.  If there turns out to be workloads which
      are affected by this change, simpler optimization from the discussion
      thread can be applied later.
      Signed-off-by: NTejun Heo <tj@kernel.org>
      LKML-Reference: <1328514611.21268.66.camel@sli10-conroe>
      Signed-off-by: NJens Axboe <axboe@kernel.dk>
      11a3122f
  2. 06 2月, 2012 2 次提交
    • D
      cdrom: use copy_to_user() without the underscores · 822bfa51
      Dan Carpenter 提交于
      "nframes" comes from the user and "nframes * CD_FRAMESIZE_RAW" can wrap
      on 32 bit systems.  That would have been ok if we used the same wrapped
      value for the copy, but we use a shifted value.  We should just use the
      checked version of copy_to_user() because it's not going to make a
      difference to the speed.
      
      Cc: stable@vger.kernel.com
      Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
      Signed-off-by: NJens Axboe <axboe@kernel.dk>
      822bfa51
    • S
      block: fix ioc locking warning · 9fa73472
      Shaohua Li 提交于
      Meelis reported a warning:
      
      WARNING: at kernel/timer.c:1122 run_timer_softirq+0x199/0x1ec()
      Hardware name: 939Dual-SATA2
      timer: cfq_idle_slice_timer+0x0/0xaa preempt leak: 00000102 -> 00000103
      Modules linked in: sr_mod cdrom videodev media drm_kms_helper ohci_hcd ehci_hcd v4l2_compat_ioctl32 usbcore i2c_ali15x3 snd_seq drm snd_timer snd_seq
      Pid: 0, comm: swapper Not tainted 3.3.0-rc2-00110-gd1256667 #176
      Call Trace:
       <IRQ>  [<ffffffff81022aaa>] warn_slowpath_common+0x7e/0x96
       [<ffffffff8114c485>] ? cfq_slice_expired+0x1d/0x1d
       [<ffffffff81022b56>] warn_slowpath_fmt+0x41/0x43
       [<ffffffff8114c526>] ? cfq_idle_slice_timer+0xa1/0xaa
       [<ffffffff8114c485>] ? cfq_slice_expired+0x1d/0x1d
       [<ffffffff8102c124>] run_timer_softirq+0x199/0x1ec
       [<ffffffff81047a53>] ? timekeeping_get_ns+0x12/0x31
       [<ffffffff810145fd>] ? apic_write+0x11/0x13
       [<ffffffff81027475>] __do_softirq+0x74/0xfa
       [<ffffffff812f337a>] call_softirq+0x1a/0x30
       [<ffffffff81002ff9>] do_softirq+0x31/0x68
       [<ffffffff810276cf>] irq_exit+0x3d/0xa3
       [<ffffffff81014aca>] smp_apic_timer_interrupt+0x6b/0x77
       [<ffffffff812f2de9>] apic_timer_interrupt+0x69/0x70
       <EOI>  [<ffffffff81040136>] ? sched_clock_cpu+0x73/0x7d
       [<ffffffff81040136>] ? sched_clock_cpu+0x73/0x7d
       [<ffffffff8100801f>] ? default_idle+0x1e/0x32
       [<ffffffff81008019>] ? default_idle+0x18/0x32
       [<ffffffff810008b1>] cpu_idle+0x87/0xd1
       [<ffffffff812de861>] rest_init+0x85/0x89
       [<ffffffff81659a4d>] start_kernel+0x2eb/0x2f8
       [<ffffffff8165926e>] x86_64_start_reservations+0x7e/0x82
       [<ffffffff81659362>] x86_64_start_kernel+0xf0/0xf7
      
      this_q == locked_q is possible. There are two problems here:
      1. In UP case, there is preemption counter issue as spin_trylock always
      successes.
      2. In SMP case, the loop breaks too earlier.
      Signed-off-by: NShaohua Li <shaohua.li@intel.com>
      Reported-by: NMeelis Roos <mroos@linux.ee>
      Reported-by: NKnut Petersen <Knut_Petersen@t-online.de>
      Tested-by: NKnut Petersen <Knut_Petersen@t-online.de>
      Signed-off-by: NJens Axboe <axboe@kernel.dk>
      9fa73472
  3. 19 1月, 2012 14 次提交
    • S
      block: fix NULL icq_cache reference · 05c30b95
      Shaohua Li 提交于
      Vivek reported a kernel crash:
      [   94.217015] BUG: unable to handle kernel NULL pointer dereference at 000000000000001c
      [   94.218004] IP: [<ffffffff81142fae>] kmem_cache_free+0x5e/0x200
      [   94.218004] PGD 13abda067 PUD 137d52067 PMD 0
      [   94.218004] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
      [   94.218004] CPU 0
      [   94.218004] Modules linked in: [last unloaded: scsi_wait_scan]
      [   94.218004]
      [   94.218004] Pid: 0, comm: swapper/0 Not tainted 3.2.0+ #16 Hewlett-Packard HP xw6600 Workstation/0A9Ch
      [   94.218004] RIP: 0010:[<ffffffff81142fae>]  [<ffffffff81142fae>] kmem_cache_free+0x5e/0x200
      [   94.218004] RSP: 0018:ffff88013fc03de0  EFLAGS: 00010006
      [   94.218004] RAX: ffffffff81e0d020 RBX: ffff880138b3c680 RCX: 00000001801c001b
      [   94.218004] RDX: 00000000003aac1d RSI: ffff880138b3c680 RDI: ffffffff81142fae
      [   94.218004] RBP: ffff88013fc03e10 R08: ffff880137830238 R09: 0000000000000001
      [   94.218004] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
      [   94.218004] R13: ffffea0004e2cf00 R14: ffffffff812f6eb6 R15: 0000000000000246
      [   94.218004] FS:  0000000000000000(0000) GS:ffff88013fc00000(0000) knlGS:0000000000000000
      [   94.218004] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
      [   94.218004] CR2: 000000000000001c CR3: 00000001395ab000 CR4: 00000000000006f0
      [   94.218004] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
      [   94.218004] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
      [   94.218004] Process swapper/0 (pid: 0, threadinfo ffffffff81e00000, task ffffffff81e0d020)
      [   94.218004] Stack:
      [   94.218004]  0000000000000102 ffff88013fc0db20 ffffffff81e22700 ffff880139500f00
      [   94.218004]  0000000000000001 000000000000000a ffff88013fc03e20 ffffffff812f6eb6
      [   94.218004]  ffff88013fc03e90 ffffffff810c8da2 ffffffff81e01fd8 ffff880137830240
      [   94.218004] Call Trace:
      [   94.218004]  <IRQ>
      [   94.218004]  [<ffffffff812f6eb6>] icq_free_icq_rcu+0x16/0x20
      [   94.218004]  [<ffffffff810c8da2>] __rcu_process_callbacks+0x1c2/0x420
      [   94.218004]  [<ffffffff810c9038>] rcu_process_callbacks+0x38/0x250
      [   94.218004]  [<ffffffff810405ee>] __do_softirq+0xce/0x3e0
      [   94.218004]  [<ffffffff8108ed04>] ? clockevents_program_event+0x74/0x100
      [   94.218004]  [<ffffffff81090104>] ? tick_program_event+0x24/0x30
      [   94.218004]  [<ffffffff8183ed1c>] call_softirq+0x1c/0x30
      [   94.218004]  [<ffffffff8100422d>] do_softirq+0x8d/0xc0
      [   94.218004]  [<ffffffff81040c3e>] irq_exit+0xae/0xe0
      [   94.218004]  [<ffffffff8183f4be>] smp_apic_timer_interrupt+0x6e/0x99
      [   94.218004]  [<ffffffff8183e330>] apic_timer_interrupt+0x70/0x80
      
      Once a queue is quiesced, it's not supposed to have any elvpriv data or
      icq's, and elevator switching depends on that.  Request alloc path
      followed the rule for elvpriv data but forgot apply it to icq's
      leading to the following crash during elevator switch. Fix it by not
      allocating icq's if ELVPRIV is not set for the request.
      Reported-by: NVivek Goyal <vgoyal@redhat.com>
      Tested-by: NVivek Goyal <vgoyal@redhat.com>
      Signed-off-by: NShaohua Li <shaohua.li@intel.com>
      Acked-by: NTejun Heo <tj@kernel.org>
      Signed-off-by: NJens Axboe <axboe@kernel.dk>
      05c30b95
    • S
      block,cfq: change code order · df0793ab
      Shaohua Li 提交于
      cfq_slice_expired will change saved_workload_slice. It should be called
      first so saved_workload_slice is correctly set to 0 after workload type
      is changed.
      This fixes the code order changed by 54b466e4.
      Tested-by: NTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
      Signed-off-by: NShaohua Li <shaohua.li@intel.com>
      Signed-off-by: NJens Axboe <axboe@kernel.dk>
      df0793ab
    • L
      uml: fix compile for x86-64 · 90a4c0f5
      Linus Torvalds 提交于
      Randy Dunlap reports that we get
      
        arch/x86/um/shared/sysdep/ptrace.h:7:20: error: redefinition of 'regs_return_value'
        arch/x86/um/shared/sysdep/ptrace.h:7:20: note: previous definition of 'regs_return_value' was here
      
      when compiling UML for x86-64.
      
      Stephen Rothwell root-caused it and says:
      
       "Caused by commit d7e7528b ("Audit: push audit success and retcode
        into arch ptrace.h") (another patch that was never in linux-next :-().
      
        This file now needs protection against double inclusion."
      
      so let's do as the man says.
      Reported-by: NRandy Dunlap <rdunlap@xenotime.net>
      Analyzed-by: NStephen Rothwell <sfr@canb.auug.org.au>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      90a4c0f5
    • L
      f59e842f
    • L
      Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending · 4ba3069f
      Linus Torvalds 提交于
      * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (26 commits)
        target: Set additional sense length field in sense data
        target: Remove legacy device status check from transport_execute_tasks
        target: Remove __transport_execute_tasks() for each processing context
        target: Remove extra se_device->execute_task_lock access in fast path
        target: Drop se_device TCQ queue_depth usage from I/O path
        target: Fix possible NULL pointer with __transport_execute_tasks
        target: Remove TFO->check_release_cmd() fabric API caller
        tcm_fc: Convert ft_send_work to use target_submit_cmd
        target: Add target_submit_cmd() for process context fabric submission
        target: Make target_put_sess_cmd use target_release_cmd_kref
        target: Set response format in INQUIRY response
        target: tcm_mod_builder: small fixups
        Documentation/target: Fix tcm_mod_builder.py build breakage
        target: remove overagressive ____cacheline_aligned annoations
        tcm_loop: bump max_sectors
        target/configs: remove trailing newline from udev_path and alias
        iscsi-target: fix chap identifier simple_strtoul usage
        target: remove useless casts
        target: simplify target_check_cdb_and_preempt
        target: Move core_scsi3_check_cdb_abort_and_preempt
        ...
      4ba3069f
    • L
      Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux · 507a03c1
      Linus Torvalds 提交于
      This includes initial support for the recently published ACPI 5.0 spec.
      In particular, support for the "hardware-reduced" bit that eliminates
      the dependency on legacy hardware.
      
      APEI has patches resulting from testing on real hardware.
      
      Plus other random fixes.
      
      * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: (52 commits)
        acpi/apei/einj: Add extensions to EINJ from rev 5.0 of acpi spec
        intel_idle: Split up and provide per CPU initialization func
        ACPI processor: Remove unneeded variable passed by acpi_processor_hotadd_init V2
        ACPI processor: Remove unneeded cpuidle_unregister_driver call
        intel idle: Make idle driver more robust
        intel_idle: Fix a cast to pointer from integer of different size warning in intel_idle
        ACPI: kernel-parameters.txt : Add intel_idle.max_cstate
        intel_idle: remove redundant local_irq_disable() call
        ACPI processor: Fix error path, also remove sysdev link
        ACPI: processor: fix acpi_get_cpuid for UP processor
        intel_idle: fix API misuse
        ACPI APEI: Convert atomicio routines
        ACPI: Export interfaces for ioremapping/iounmapping ACPI registers
        ACPI: Fix possible alignment issues with GAS 'address' references
        ACPI, ia64: Use SRAT table rev to use 8bit or 16/32bit PXM fields (ia64)
        ACPI, x86: Use SRAT table rev to use 8bit or 32bit PXM fields (x86/x86-64)
        ACPI: Store SRAT table revision
        ACPI, APEI, Resolve false conflict between ACPI NVS and APEI
        ACPI, Record ACPI NVS regions
        ACPI, APEI, EINJ, Refine the fix of resource conflict
        ...
      507a03c1
    • S
      tpm: fix (ACPI S3) suspend regression · be405411
      Stefan Berger 提交于
      This patch fixes an (ACPI S3) suspend regression introduced in commit
      68d6e671 ("tpm: Introduce function to poll for result of self test")
      and occurring with an Infineon TPM and tpm_tis and tpm_infineon drivers
      active.
      
      The suspend problem occurred if the TPM was disabled and/or deactivated
      and therefore the TPM_PCRRead checking the result of the (asynchronous)
      self test returned an error code which then caused the tpm_tis driver to
      become inactive and this then seemed to have negatively influenced the
      suspend support by the tpm_infineon driver...  Besides that the tpm_tis
      drive may stay active even if the TPM is disabled and/or deactivated.
      Signed-off-by: NStefan Berger <stefanb@linux.vnet.ibm.com>
      Tested-by: NRafael J. Wysocki <rjw@sisk.pl>
      Acked-by: NRajiv Andrade <srajiv@linux.vnet.ibm.com>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      be405411
    • L
      nvme: fix merge error due to change of 'make_request_fn' fn type · 93c3d65b
      Linus Torvalds 提交于
      The type of 'make_request_fn' changed in 5a7bbad2 ("block: remove
      support for bio remapping from ->make_request"), but the merge of the
      nvme driver didn't take that into account, and as a result the driver
      would compile with a warning:
      
        drivers/block/nvme.c: In function 'nvme_alloc_ns':
        drivers/block/nvme.c:1336:2: warning: passing argument 2 of 'blk_queue_make_request' from incompatible pointer type [enabled by default]
        include/linux/blkdev.h:830:13: note: expected 'void (*)(struct request_queue *, struct bio *)' but argument is of type 'int (*)(struct request_queue *, struct bio *)'
      
      It's benign, but the warning is annoying.
      Reported-by: NStephen Rothwell <sfr@canb.auug.org>
      Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      93c3d65b
    • S
      xen: using EXPORT_SYMBOL requires including export.h · 9ef9b20b
      Stephen Rothwell 提交于
      Fix these warnings:
      
        drivers/xen/biomerge.c:14:1: warning: data definition has no type or storage class [enabled by default]
        drivers/xen/biomerge.c:14:1: warning: type defaults to 'int' in declaration of 'EXPORT_SYMBOL' [-Wimplicit-int]
        drivers/xen/biomerge.c:14:1: warning: parameter names (without types) in function declaration [enabled by default]
      
      And this build error:
      
        ERROR: "xen_biovec_phys_mergeable" [drivers/block/nvme.ko] undefined!
      Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      9ef9b20b
    • L
      Merge branch 'for-linus/i2c-33' of git://git.fluff.org/bjdooks/linux · aa303f2c
      Linus Torvalds 提交于
      * 'for-linus/i2c-33' of git://git.fluff.org/bjdooks/linux:
        i2c-eg20t: Change-company-name-OKI-SEMICONDUCTOR to LAPIS Semiconductor
        i2c-eg20t: Support new device LAPIS Semiconductor ML7831 IOH
        i2c-eg20t: modified the setting of transfer rate.
        i2c-eg20t: use i2c_add_numbered_adapter to get a fixed bus number
        i2c: OMAP: Add DT support for i2c controller
        I2C: OMAP: NACK without STP
        I2C: OMAP: correct SYSC register offset for OMAP4
      aa303f2c
    • L
      Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media · 4a7c1ff2
      Linus Torvalds 提交于
      * 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (57 commits)
        [media] as3645a: Fix compilation by including slab.h
        [media] s5p-fimc: Remove linux/version.h include from fimc-mdevice.c
        [media] s5p-mfc: Remove linux/version.h include from s5p_mfc.c
        [media] ds3000: using logical && instead of bitwise &
        [media] v4l2-ctrls: make control names consistent
        [media] DVB: dib0700, add support for Nova-TD LEDs
        [media] DVB: dib0700, add corrected Nova-TD frontend_attach
        [media] DVB: dib0700, separate stk7070pd initialization
        [media] DVB: dib0700, move Nova-TD Stick to a separate set
        [media] : add MODULE_FIRMWARE to dib0700
        [media] DVB-CORE: remove superfluous DTV_CMDs
        [media] s5p-jpeg: adapt to recent videobuf2 changes
        [media] s5p-g2d: fixed a bug in controls setting function
        [media] s5p-mfc: Fix volatile controls setup
        [media] drivers/media/video/s5p-mfc/s5p_mfc.c: adjust double test
        [media] drivers/media/video/s5p-fimc/fimc-capture.c: adjust double test
        [media] s5p-fimc: Fix incorrect control ID assignment
        [media] dvb_frontend: Don't call get_frontend() if idle
        [media] DocBook/dvbproperty.xml: Remove DTV_MODULATION from ISDB-T
        [media] DocBook/dvbproperty.xml: Fix ISDB-T delivery system parameters
        ...
      4a7c1ff2
    • L
      Merge branch 'fix/asoc' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · 9278e634
      Linus Torvalds 提交于
      * 'fix/asoc' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
        ASoC: Wait for WM8993 FLL to stabilise
        ASoC: core - Free platform DAPM context at platform removal.
        ASoC: dapm - Fix check for codec context in dapm_power_widgets().
        ASoC: sgtl5000: update author email address
        ASoC: Fix DMA channel leak in imx-pcm-dma-mx2 driver.
      9278e634
    • L
      Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 · d71f5be2
      Linus Torvalds 提交于
      SCSI updates on 20120118
      
      * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (49 commits)
        [SCSI] libfc: remove redundant timer init for fcp
        [SCSI] fcoe: Move fcoe_debug_logging from fcoe.h to fcoe.c
        [SCSI] libfc: Declare local functions static
        [SCSI] fcoe: fix regression on offload em matching function for initiator/target
        [SCSI] qla4xxx: Update driver version to 5.02.00-k12
        [SCSI] qla4xxx: Cleanup modinfo display
        [SCSI] qla4xxx: Update license
        [SCSI] qla4xxx: Clear the RISC interrupt bit during FW init
        [SCSI] qla4xxx: Added error logging for firmware abort
        [SCSI] qla4xxx: Disable generating pause frames in case of FW hung
        [SCSI] qla4xxx: Temperature monitoring for ISP82XX core.
        [SCSI] megaraid: fix sparse warnings
        [SCSI] sg: convert to kstrtoul_from_user()
        [SCSI] don't change sdev starvation list order without request dispatched
        [SCSI] isci: fix, prevent port from getting stuck in the 'configuring' state
        [SCSI] isci: fix start OOB
        [SCSI] isci: fix io failures while wide port links are coming up
        [SCSI] isci: allow more time for wide port targets
        [SCSI] isci: enable wide port targets
        [SCSI] isci: Fix IO fails when pull cable from phy in x4 wideport in MPC mode.
        ...
      d71f5be2
    • L
      Merge git://git.infradead.org/users/willy/linux-nvme · 92b5abbb
      Linus Torvalds 提交于
      * git://git.infradead.org/users/willy/linux-nvme: (105 commits)
        NVMe: Set number of queues correctly
        NVMe: Version 0.8
        NVMe: Set queue flags correctly
        NVMe: Simplify nvme_unmap_user_pages
        NVMe: Mark the end of the sg list
        NVMe: Fix DMA mapping for admin commands
        NVMe: Rename IO_TIMEOUT to NVME_IO_TIMEOUT
        NVMe: Merge the nvme_bio and nvme_prp data structures
        NVMe: Change nvme_completion_fn to take a dev
        NVMe: Change get_nvmeq to take a dev instead of a namespace
        NVMe: Simplify completion handling
        NVMe: Update Identify Controller data structure
        NVMe: Implement doorbell stride capability
        NVMe: Version 0.7
        NVMe: Don't probe namespace 0
        Fix calculation of number of pages in a PRP List
        NVMe: Create nvme_identify and nvme_get_features functions
        NVMe: Fix memory leak in nvme_dev_add()
        NVMe: Fix calls to dma_unmap_sg
        NVMe: Correct sg list setup in nvme_map_user_pages
        ...
      92b5abbb
  4. 18 1月, 2012 23 次提交