1. 28 3月, 2009 2 次提交
  2. 27 3月, 2009 1 次提交
  3. 09 1月, 2009 2 次提交
  4. 31 12月, 2008 2 次提交
  5. 30 12月, 2008 2 次提交
  6. 17 7月, 2008 1 次提交
  7. 24 4月, 2008 1 次提交
  8. 23 4月, 2008 4 次提交
  9. 10 5月, 2007 3 次提交
  10. 15 3月, 2007 2 次提交
  11. 07 3月, 2007 1 次提交
  12. 16 2月, 2007 1 次提交
    • A
      Execute AML Notify() requests on stack. · 5f7748cf
      Alexey Starikovskiy 提交于
      HP nx6125/nx6325/... machines have a _GPE handler with an infinite
      loop sending Notify() events to different ACPI subsystems.
      
      The notify handler in the ACPI thermal driver is a C-routine,
      which may invoke the ACPI interpreter again to get access
      to some ACPI variables such as temperature.  (acpi_evaluate_xxx)
      On these HP machines such an evaluation changes state of an ASL variable
      and lets the loop above break.
      
      In the current ACPI implementation, Notify requests are being deferred
      to the same kacpid workqueue on which the above GPE handler with
      infinite loop is executing. Thus we have a deadlock -- loop will
      continue to spin, sending notify events, and at the same time
      preventing these notify events from being run on a workqueue. All
      notify events are deferred, thus we see explosion in memory consumption.
      
      Also as GPE handling is blocked, machines overheat because ACPI-based
      fan control is stalled.  Eventually by external poll of the same
      acpi_evaluate, kacpid is released and all the queued notify events are
      free to run, thus 100% CPU utilization by kacpid for several seconds
      or more.
      
      To prevent this failure,  Linux must not send notify events to the
      kacpid workqueue -- either executing them immediately or putting them
      on some other thread.
      
      The first attempt to create a new thread was done by Peter Wainwright
      He created a bunch of threads, which were stealing work from a kacpid
      workqueue.
      This patch appeared in 2.6.15-based kernel shipped with Ubuntu 6.06 LTS.
      
      Second attempt was done by Alexey Starikovskiy, who created a new thread
      for each Notify event. This worked OK on HP nx machines,
      but broke Linus' Compaq n620c, by producing threads with a speed what
      they stopped the machine completely.
      Thus this patch was reverted from 2.6.18-rc2.
      
      Alexey re-made the patch to create second workqueue just for notify events,
      thus hopping it will not break Linus' machine. Patch was tested on the
      same HP nx machines in #5534 and #7122, but this broke Linus' machine
      also and was reverted from 2.6.19-rc with much fanfair.
      
      The 4th patch inserted schedule_timeout(1) into deferred
      execution of kacpid, if we had any notify requests pending, but Linus
      decided that it was too complex (involved either changes to workqueue
      to see if it's empty or atomic inc/dec).  Then a 5th attempt did a
      yield() to every GPE execution.
      
      Finally, this 6th generation patch simply executes the notify handler
      on the stack.  Previous attempts to do this simple solution failed
      because of issues in AML mutex re-entrancy which are now fixed
      by the previous patch in this series.
      
      http://bugzilla.kernel.org/show_bug.cgi?id=5534Signed-off-by: NAlexey Starikovskiy <alexey.y.starikovskiy@linux.intel.com>
      Signed-off-by: NLen Brown <len.brown@intel.com>
      5f7748cf
  13. 03 2月, 2007 7 次提交
  14. 07 11月, 2006 1 次提交
  15. 14 10月, 2006 1 次提交
  16. 14 6月, 2006 4 次提交
    • B
      ACPI: ACPICA 20060526 · 4119532c
      Bob Moore 提交于
      Restructured, flattened, and simplified the internal
      interfaces for namespace object evaluation - resulting
      in smaller code, less CPU stack use, and fewer
      interfaces. (With assistance from Mikhail Kouzmich)
      
      Fixed a problem with the CopyObject operator where the
      first parameter was not typed correctly for the parser,
      interpreter, compiler, and disassembler. Caused various
      errors and unexpected behavior.
      
      Fixed a problem where a ShiftLeft or ShiftRight of
      more than 64 bits produced incorrect results with some
      C compilers. Since the behavior of C compilers when
      the shift value is larger than the datatype width is
      apparently not well defined, the interpreter now detects
      this condition and simply returns zero as expected in all
      such cases. (BZ 395)
      
      Fixed problem reports (Valery Podrezov) integrated: -
      Update String-to-Integer conversion to match ACPI 3.0A spec
      http://bugzilla.kernel.org/show_bug.cgi?id=5329
      Allow interpreter to handle nested method declarations
      http://bugzilla.kernel.org/show_bug.cgi?id=5361
      
      Fixed problem reports (Fiodor Suietov) integrated: -
      acpi_terminate() doesn't free debug memory allocation
      list objects (BZ 355) - After Core Subsystem
      shutdown, acpi_subsystem_status() returns AE_OK (BZ 356) -
      acpi_os_unmap_memory() for RSDP can be invoked inconsistently
      (BZ 357) - Resource Manager should return AE_TYPE for
      non-device objects (BZ 358) - Incomplete cleanup branch
      in AcpiNsEvaluateRelative (BZ 359) - Use acpi_os_free()
      instead of ACPI_FREE in acpi_rs_set_srs_method_data (BZ 360)
      - Incomplete cleanup branch in acpi_ps_parse_aml (BZ 361) -
      Incomplete cleanup branch in acpi_ds_delete_walk_state (BZ 362)
      - acpi_get_table_header returns AE_NO_ACPI_TABLES until DSDT
      is loaded (BZ 365) - Status of the Global Initialization
      Handler call not used (BZ 366) - Incorrect object parameter
      to Global Initialization Handler (BZ 367)
      Signed-off-by: NBob Moore <robert.moore@intel.com>
      Signed-off-by: NLen Brown <len.brown@intel.com>
      4119532c
    • B
      ACPI: ACPICA 20060512 · 958dd242
      Bob Moore 提交于
      Replaced the acpi_os_queue_for_execution() with a new
      interface named acpi_os_execute(). The major difference is
      that the new interface does not have a Priority parameter,
      this appeared to be useless and has been replaced by
      a Type parameter. The Type tells the OS what type of
      execution is being requested, such as global lock handler,
      notify handler, GPE handler, etc. This allows the host
      to queue and execute the request as appropriate for the
      request type, possibly using different work queues and
      different priorities for the various request types. This
      enables fixes for multithreading deadlock problems such as
      http://bugzilla.kernel.org/show_bug.cgi?id=5534
      (Alexey Starikovskiy and Bob Moore)
      
      Fixed a possible memory leak associated with the
      support for the so-called "implicit return" ACPI
      extension. Reported by FreeBSD  (Fiodor Suietov)
      http://bugzilla.kernel.org/show_bug.cgi?id=6514
      
      Fixed a problem with the Load() operator where a table
      load from an operation region could overwrite an internal
      table buffer by up to 7 bytes and cause alignment faults
      on IPF systems. (With assistance from Luming Yu)
      Signed-off-by: NBob Moore <robert.moore@intel.com>
      Signed-off-by: NLen Brown <len.brown@intel.com>
      958dd242
    • B
      ACPI: ACPICA 20060421 · b229cf92
      Bob Moore 提交于
      Removed a device initialization optimization introduced in
      20051216 where the _STA method was not run unless an _INI
      was also present for the same device. This optimization
      could cause problems because it could allow _INI methods
      to be run within a not-present device subtree (If a
      not-present device had no _INI, _STA would not be run,
      the not-present status would not be discovered, and the
      children of the device would be incorrectly traversed.)
      
      Implemented a new _STA optimization where namespace
      subtrees that do not contain _INI are identified and
      ignored during device initialization. Selectively running
      _STA can significantly improve boot time on large machines
      (with assistance from Len Brown.)
      
      Implemented support for the device initialization case
      where the returned _STA flags indicate a device not-present
      but functioning. In this case, _INI is not run, but the
      device children are examined for presence, as per the
      ACPI specification.
      
      Implemented an additional change to the IndexField support
      in order to conform to MS behavior. The value written to
      the Index Register is not simply a byte offset, it is a
      byte offset in units of the access width of the parent
      Index Field. (Fiodor Suietov)
      
      Defined and deployed a new OSL interface,
      acpi_os_validate_address().  This interface is called during
      the creation of all AML operation regions, and allows
      the host OS to exert control over what addresses it will
      allow the AML code to access. Operation Regions whose
      addresses are disallowed will cause a runtime exception
      when they are actually accessed (will not affect or abort
      table loading.)
      
      Defined and deployed a new OSL interface,
      acpi_os_validate_interface().  This interface allows the host OS
      to match the various "optional" interface/behavior strings
      for the _OSI predefined control method as appropriate
      (with assistance from Bjorn Helgaas.)
      
      Restructured and corrected various problems in the
      exception handling code paths within DsCallControlMethod
      and DsTerminateControlMethod in dsmethod (with assistance
      from Takayoshi Kochi.)
      
      Modified the Linux source converter to ignore quoted string
      literals while converting identifiers from mixed to lower
      case. This will correct problems with the disassembler
      and other areas where such strings must not be modified.
      
      The ACPI_FUNCTION_* macros no longer require quotes around
      the function name. This allows the Linux source converter
      to convert the names, now that the converter ignores
      quoted strings.
      Signed-off-by: NBob Moore <robert.moore@intel.com>
      Signed-off-by: NLen Brown <len.brown@intel.com>
      b229cf92
    • B
      [ACPI] ACPICA 20060317 · 61686124
      Bob Moore 提交于
      Implemented the use of a cache object for all internal
      namespace nodes. Since there are about 1000 static nodes
      in a typical system, this will decrease memory use for
      cache implementations that minimize per-allocation overhead
      (such as a slab allocator.)
      
      Removed the reference count mechanism for internal
      namespace nodes, since it was deemed unnecessary. This
      reduces the size of each namespace node by about 5%-10%
      on all platforms. Nodes are now 20 bytes for the 32-bit
      case, and 32 bytes for the 64-bit case.
      
      Optimized several internal data structures to reduce
      object size on 64-bit platforms by packing data within
      the 64-bit alignment. This includes the frequently used
      ACPI_OPERAND_OBJECT, of which there can be ~1000 static
      instances corresponding to the namespace objects.
      
      Added two new strings for the predefined _OSI method:
      "Windows 2001.1 SP1" and "Windows 2006".
      
      Split the allocation tracking mechanism out to a separate
      file, from utalloc.c to uttrack.c. This mechanism appears
      to be only useful for application-level code. Kernels may
      wish to not include uttrack.c in distributions.
      
      Removed all remnants of the obsolete ACPI_REPORT_* macros
      and the associated code. (These macros have been replaced
      by the ACPI_ERROR and ACPI_WARNING macros.)
      Signed-off-by: NBob Moore <robert.moore@intel.com>
      Signed-off-by: NLen Brown <len.brown@intel.com>
      61686124
  17. 31 3月, 2006 1 次提交
  18. 31 1月, 2006 1 次提交
    • B
      [ACPI] ACPICA 20060127 · b8e4d893
      Bob Moore 提交于
      Implemented support in the Resource Manager to allow
      unresolved namestring references within resource package
      objects for the _PRT method. This support is in addition
      to the previously implemented unresolved reference
      support within the AML parser. If the interpreter slack
      mode is enabled (true on Linux unless acpi=strict),
      these unresolved references will be passed through
      to the caller as a NULL package entry.
      http://bugzilla.kernel.org/show_bug.cgi?id=5741
      
      Implemented and deployed new macros and functions for
      error and warning messages across the subsystem. These
      macros are simpler and generate less code than their
      predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
      ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_*
      macros.
      
      Implemented the acpi_cpu_flags type to simplify host OS
      integration of the Acquire/Release Lock OSL interfaces.
      Suggested by Steven Rostedt and Andrew Morton.
      
      Fixed a problem where Alias ASL operators are sometimes
      not correctly resolved. causing AE_AML_INTERNAL
      http://bugzilla.kernel.org/show_bug.cgi?id=5189
      http://bugzilla.kernel.org/show_bug.cgi?id=5674
      
      Fixed several problems with the implementation of the
      ConcatenateResTemplate ASL operator. As per the ACPI
      specification, zero length buffers are now treated as a
      single EndTag. One-length buffers always cause a fatal
      exception. Non-zero length buffers that do not end with
      a full 2-byte EndTag cause a fatal exception.
      
      Fixed a possible structure overwrite in the
      AcpiGetObjectInfo external interface. (With assistance
      from Thomas Renninger)
      Signed-off-by: NBob Moore <robert.moore@intel.com>
      Signed-off-by: NLen Brown <len.brown@intel.com>
      b8e4d893
  19. 20 1月, 2006 1 次提交
    • B
      [ACPI] ACPICA 20060113 · 4a90c7e8
      Bob Moore 提交于
      Added 2006 copyright.
      
      At SuSE's suggestion, enabled all error messages
      without enabling function tracing, ie with CONFIG_ACPI_DEBUG=n
      
      Replaced all instances of the ACPI_DEBUG_PRINT macro invoked at
      the ACPI_DB_ERROR and ACPI_DB_WARN debug levels with
      the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
      respectively. This preserves all error and warning messages
      in the non-debug version of the ACPICA code (this has been
      referred to as the "debug lite" option.) Over 200 cases
      were converted to create a total of over 380 error/warning
      messages across the ACPICA code. This increases the code
      and data size of the default non-debug version by about 13K.
      Added ACPI_NO_ERROR_MESSAGES flag to enable deleting all messages.
      The size of the debug version remains about the same.
      Signed-off-by: NBob Moore <robert.moore@intel.com>
      Signed-off-by: NLen Brown <len.brown@intel.com>
      4a90c7e8
  20. 05 8月, 2005 1 次提交
  21. 30 7月, 2005 1 次提交
    • R
      [ACPI] ACPICA 20050729 from Bob Moore · 0c9938cc
      Robert Moore 提交于
      Implemented support to ignore an attempt to install/load
      a particular ACPI table more than once. Apparently there
      exists BIOS code that repeatedly attempts to load the same
      SSDT upon certain events. Thanks to Venkatesh Pallipadi.
      
      Restructured the main interface to the AML parser in
      order to correctly handle all exceptional conditions. This
      will prevent leakage of the OwnerId resource and should
      eliminate the AE_OWNER_ID_LIMIT exceptions seen on some
      machines. Thanks to Alexey Starikovskiy.
      
      Support for "module level code" has been disabled in this
      version due to a number of issues that have appeared
      on various machines. The support can be enabled by
      defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
      compilation. When the issues are fully resolved, the code
      will be enabled by default again.
      
      Modified the internal functions for debug print support
      to define the FunctionName parameter as a (const char *)
      for compatibility with compiler built-in macros such as
      __FUNCTION__, etc.
      
      Linted the entire ACPICA source tree for both 32-bit
      and 64-bit.
      Signed-off-by: NRobert Moore <robert.moore@intel.com>
      Signed-off-by: NLen Brown <len.brown@intel.com>
      0c9938cc