1. 24 4月, 2012 3 次提交
    • V
      ring-buffer: Add per_cpu ring buffer control files · 438ced17
      Vaibhav Nagarnaik 提交于
      Add a debugfs entry under per_cpu/ folder for each cpu called
      buffer_size_kb to control the ring buffer size for each CPU
      independently.
      
      If the global file buffer_size_kb is used to set size, the individual
      ring buffers will be adjusted to the given size. The buffer_size_kb will
      report the common size to maintain backward compatibility.
      
      If the buffer_size_kb file under the per_cpu/ directory is used to
      change buffer size for a specific CPU, only the size of the respective
      ring buffer is updated. When tracing/buffer_size_kb is read, it reports
      'X' to indicate that sizes of per_cpu ring buffers are not equivalent.
      
      Link: http://lkml.kernel.org/r/1328212844-11889-1-git-send-email-vnagarnaik@google.com
      
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Michael Rubin <mrubin@google.com>
      Cc: David Sharp <dhsharp@google.com>
      Cc: Justin Teravest <teravest@google.com>
      Signed-off-by: NVaibhav Nagarnaik <vnagarnaik@google.com>
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      438ced17
    • D
      tracing: Remove an unneeded check in trace_seq_buffer() · 5a26c8f0
      Dan Carpenter 提交于
      memcpy() returns a pointer to "bug".  Hopefully, it's not NULL here or
      we would already have Oopsed.
      
      Link: http://lkml.kernel.org/r/20120420063145.GA22649@elgon.mountain
      
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
      Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      5a26c8f0
    • S
      tracing: Add percpu buffers for trace_printk() · 07d777fe
      Steven Rostedt 提交于
      Currently, trace_printk() uses a single buffer to write into
      to calculate the size and format needed to save the trace. To
      do this safely in an SMP environment, a spin_lock() is taken
      to only allow one writer at a time to the buffer. But this could
      also affect what is being traced, and add synchronization that
      would not be there otherwise.
      
      Ideally, using percpu buffers would be useful, but since trace_printk()
      is only used in development, having per cpu buffers for something
      never used is a waste of space. Thus, the use of the trace_bprintk()
      format section is changed to be used for static fmts as well as dynamic ones.
      Then at boot up, we can check if the section that holds the trace_printk
      formats is non-empty, and if it does contain something, then we
      know a trace_printk() has been added to the kernel. At this time
      the trace_printk per cpu buffers are allocated. A check is also
      done at module load time in case a module is added that contains a
      trace_printk().
      
      Once the buffers are allocated, they are never freed. If you use
      a trace_printk() then you should know what you are doing.
      
      A buffer is made for each type of context:
      
        normal
        softirq
        irq
        nmi
      
      The context is checked and the appropriate buffer is used.
      This allows for totally lockless usage of trace_printk(),
      and they no longer even disable interrupts.
      Requested-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      07d777fe
  2. 13 4月, 2012 2 次提交
    • I
      Merge tag 'v3.4-rc2' into perf/core · a385ec4f
      Ingo Molnar 提交于
      Merge Linux 3.4-rc2: we were on v3.3, update the base.
      Signed-off-by: NIngo Molnar <mingo@kernel.org>
      a385ec4f
    • I
      Merge tag 'perf-core-for-mingo' of... · 659c36fc
      Ingo Molnar 提交于
      Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
      
      Fixes and improvements for perf/core:
      
      . Overhaul the tools/ makefiles, gluing them to the top level Makefile, from
        Borislav Petkov.
      
      . Move the UI files from tools/perf/util/ui/ to tools/perf/ui/. Also move
        the GTK+ browser to tools/perf/ui/gtk/, from Namhyung Kim.
      
      . Only fallback to sw cycles counter on ENOENT for the hw cycles, from
        Robert Richter
      
      . Trivial fixes from Robert Richter
      
      . Handle the autogenerated bison/flex files better, from Namhyung and Jiri Olsa.
      
      . Navigate jump instructions in the annotate browser, just press enter or ->,
        still needs support for a jump navigation history, i.e. to go back.
      
      . Search string in the annotate browser: same keys as vim:
           / forward
           n next backward/forward
           ? backward
      
      . Clarify number of events/samples in the report header, from Ashay Rane
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      Signed-off-by: NIngo Molnar <mingo@kernel.org>
      659c36fc
  3. 12 4月, 2012 12 次提交
  4. 11 4月, 2012 1 次提交
  5. 08 4月, 2012 13 次提交
  6. 07 4月, 2012 9 次提交
    • L
      Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux · f21fec96
      Linus Torvalds 提交于
      Pull ACPI & Power Management patches from Len Brown:
       "Two fixes for cpuidle merge-window changes, plus a URL fix in
        MAINTAINERS"
      
      * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
        MAINTAINERS: Update git url for ACPI
        cpuidle: Fix panic in CPU off-lining with no idle driver
        ACPI processor: Use safe_halt() rather than halt() in acpi_idle_play_dead()
      f21fec96
    • L
      Merge branch '3.4-rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending · a0421da4
      Linus Torvalds 提交于
      Pull target fixes from Nicholas Bellinger:
       "Pull two tcm_fc fabric related fixes for -rc2:
      
        Note that both have been CC'ed to stable, and patch #1 is the
        important one that addresses a memory corruption bug related to FC
        exchange timeouts + command abort.
      
        Thanks again to MDR for tracking down this issue!"
      
      * '3.4-rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
        tcm_fc: Do not free tpg structure during wq allocation failure
        tcm_fc: Add abort flag for gracefully handling exchange timeout
      a0421da4
    • M
      tcm_fc: Do not free tpg structure during wq allocation failure · 06383f10
      Mark Rustad 提交于
      Avoid freeing a registered tpg structure if an alloc_workqueue call
      fails.  This fixes a bug where the failure was leaking memory associated
      with se_portal_group setup during the original core_tpg_register() call.
      Signed-off-by: NMark Rustad <mark.d.rustad@intel.com>
      Acked-by: NKiran Patil <Kiran.patil@intel.com>
      Cc: <stable@vger.kernel.org>
      Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      06383f10
    • M
      tcm_fc: Add abort flag for gracefully handling exchange timeout · e1c40382
      Mark Rustad 提交于
      Add abort flag and use it to terminate processing when an exchange
      is timed out or is reset. The abort flag is used in place of the
      transport_generic_free_cmd function call in the reset and timeout
      cases, because calling that function in that context would free
      memory that was in use. The aborted flag allows the lifetime to
      be managed in a more normal way, while truncating the processing.
      
      This change eliminates a source of memory corruption which
      manifested in a variety of ugly ways.
      
      (nab: Drop unused struct fc_exch *ep in ft_recv_seq)
      Signed-off-by: NMark Rustad <mark.d.rustad@intel.com>
      Acked-by: NKiran Patil <Kiran.patil@intel.com>
      Cc: <stable@vger.kernel.org>
      Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
      e1c40382
    • L
      Merge branches 'idle-fix' and 'misc' into release · eeaab2d8
      Len Brown 提交于
      eeaab2d8
    • I
      MAINTAINERS: Update git url for ACPI · aaef292a
      Igor Murzov 提交于
      Signed-off-by: NIgor Murzov <e-mail@date.by>
      Signed-off-by: NLen Brown <len.brown@intel.com>
      aaef292a
    • L
      Merge branch 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile · 4157368e
      Linus Torvalds 提交于
      Pull arch/tile bug fixes from Chris Metcalf:
       "This includes Paul Gortmaker's change to fix the <asm/system.h>
        disintegration issues on tile, a fix to unbreak the tilepro ethernet
        driver, and a backlog of bugfix-only changes from internal Tilera
        development over the last few months.
      
        They have all been to LKML and on linux-next for the last few days.
        The EDAC change to MAINTAINERS is an oddity but discussion on the
        linux-edac list suggested I ask you to pull that change through my
        tree since they don't have a tree to pull edac changes from at the
        moment."
      
      * 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: (39 commits)
        drivers/net/ethernet/tile: fix netdev_alloc_skb() bombing
        MAINTAINERS: update EDAC information
        tilepro ethernet driver: fix a few minor issues
        tile-srom.c driver: minor code cleanup
        edac: say "TILEGx" not "TILEPro" for the tilegx edac driver
        arch/tile: avoid accidentally unmasking NMI-type interrupt accidentally
        arch/tile: remove bogus performance optimization
        arch/tile: return SIGBUS for addresses that are unaligned AND invalid
        arch/tile: fix finv_buffer_remote() for tilegx
        arch/tile: use atomic exchange in arch_write_unlock()
        arch/tile: stop mentioning the "kvm" subdirectory
        arch/tile: export the page_home() function.
        arch/tile: fix pointer cast in cacheflush.c
        arch/tile: fix single-stepping over swint1 instructions on tilegx
        arch/tile: implement panic_smp_self_stop()
        arch/tile: add "nop" after "nap" to help GX idle power draw
        arch/tile: use proper memparse() for "maxmem" options
        arch/tile: fix up locking in pgtable.c slightly
        arch/tile: don't leak kernel memory when we unload modules
        arch/tile: fix bug in delay_backoff()
        ...
      4157368e
    • L
      Merge tag 'stable/for-linus-3.4-rc1-tag' of... · 9479f0f8
      Linus Torvalds 提交于
      Merge tag 'stable/for-linus-3.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
      
      Pull xen fixes from Konrad Rzeszutek Wilk:
       "Two fixes for regressions:
         * one is a workaround that will be removed in v3.5 with proper fix in
           the tip/x86 tree,
         * the other is to fix drivers to load on PV (a previous patch made
           them only load in PVonHVM mode).
      
        The rest are just minor fixes in the various drivers and some cleanup
        in the core code."
      
      * tag 'stable/for-linus-3.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
        xen/pcifront: avoid pci_frontend_enable_msix() falsely returning success
        xen/pciback: fix XEN_PCI_OP_enable_msix result
        xen/smp: Remove unnecessary call to smp_processor_id()
        xen/x86: Workaround 'x86/ioapic: Add register level checks to detect bogus io-apic entries'
        xen: only check xen_platform_pci_unplug if hvm
      9479f0f8
    • L
      Merge tag 'mmc-fixes-for-3.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc · 1ddca057
      Linus Torvalds 提交于
      Pull MMC fixes from Chris Ball:
       - Disable use of MSI in sdhci-pci, which caused multiple chipsets to
         stop working in 3.4-rc1.  I'll wait to turn this on again until we
         have a chipset whitelist for it.
       - Fix a libertas SDIO powered-resume regression introduced in 3.3;
         thanks to Neil Brown and Rafael Wysocki for this fix.
       - Fix module reloading on omap_hsmmc.
       - Stop trusting the spec/card's specified maximum data timeout length,
         and use three seconds instead.  Previously we used 300ms.
      
      Also cleanups and fixes for s3c, atmel, sh_mmcif and omap_hsmmc.
      
      * tag 'mmc-fixes-for-3.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (28 commits)
        mmc: use really long write timeout to deal with crappy cards
        mmc: sdhci-dove: Fix compile error by including module.h
        mmc: Prevent 1.8V switch for SD hosts that don't support UHS modes.
        Revert "mmc: sdhci-pci: Add MSI support"
        Revert "mmc: sdhci-pci: add quirks for broken MSI on O2Micro controllers"
        mmc: core: fix power class selection
        mmc: omap_hsmmc: fix module re-insertion
        mmc: omap_hsmmc: convert to module_platform_driver
        mmc: omap_hsmmc: make it behave well as a module
        mmc: omap_hsmmc: trivial cleanups
        mmc: omap_hsmmc: context save after enabling runtime pm
        mmc: omap_hsmmc: use runtime put sync in probe error patch
        mmc: sdio: Use empty system suspend/resume callbacks at the bus level
        mmc: bus: print bus speed mode of UHS-I card
        mmc: sdhci-pci: add quirks for broken MSI on O2Micro controllers
        mmc: sh_mmcif: Simplify calculation of mmc->f_min
        mmc: sh_mmcif: mmc->f_max should be half of the bus clock
        mmc: sh_mmcif: double clock speed
        mmc: block: Remove use of mmc_blk_set_blksize
        mmc: atmel-mci: add support for odd clock dividers
        ...
      1ddca057