1. 15 4月, 2009 10 次提交
    • S
      tracing/events: move trace point headers into include/trace/events · ad8d75ff
      Steven Rostedt 提交于
      Impact: clean up
      
      Create a sub directory in include/trace called events to keep the
      trace point headers in their own separate directory. Only headers that
      declare trace points should be defined in this directory.
      
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Neil Horman <nhorman@tuxdriver.com>
      Cc: Zhao Lei <zhaolei@cn.fujitsu.com>
      Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
      Cc: Pekka Enberg <penberg@cs.helsinki.fi>
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      ad8d75ff
    • S
      tracing/events: fix lockdep system name · ecda8ae0
      Steven Rostedt 提交于
      Impact: fix compile error of lockdep event tracer
      
      Ingo Molnar pointed out that the system name for the lockdep tracer was "lock"
      which is used to include the event trace file name. It should be "lockdep"
      Reported-by: NIngo Molnar <mingo@elte.hu>
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      ecda8ae0
    • S
      tracing/events: fix compile for modules disabled · 61f919a1
      Steven Rostedt 提交于
      Impact: compile fix
      
      The addition of TRACE_EVENT for modules breaks the build for when
      modules are disabled. This code fixes that.
      Reported-by: NIngo Molnar <mingo@elte.hu>
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      61f919a1
    • S
      tracing/events: add support for modules to TRACE_EVENT · 6d723736
      Steven Rostedt 提交于
      Impact: allow modules to add TRACE_EVENTS on load
      
      This patch adds the final hooks to allow modules to use the TRACE_EVENT
      macro. A notifier and a data structure are used to link the TRACE_EVENTs
      defined in the module to connect them with the ftrace event tracing system.
      
      It also adds the necessary automated clean ups to the trace events when a
      module is removed.
      
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      6d723736
    • S
      tracing/events: add export symbols for trace events in modules · 17c873ec
      Steven Rostedt 提交于
      Impact: let modules add trace events
      
      The trace event code requires some functions to be exported to allow
      modules to use TRACE_EVENT. This patch adds EXPORT_SYMBOL_GPL to the
      necessary functions.
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      17c873ec
    • S
      tracing/events: convert event call sites to use a link list · a59fd602
      Steven Rostedt 提交于
      Impact: makes it possible to define events in modules
      
      The events are created by reading down the section that they are linked
      in by the macros. But this is not scalable to modules. This patch converts
      the manipulations to use a global link list, and on boot up it adds
      the items in the section to the list.
      
      This change will allow modules to add their tracing events to the list as
      well.
      
      Note, this change alone does not permit modules to use the TRACE_EVENT macros,
      but the change is needed for them to eventually do so.
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      a59fd602
    • S
      tracing/events: move the ftrace event tracing code to core · f42c85e7
      Steven Rostedt 提交于
      This patch moves the ftrace creation into include/trace/ftrace.h and
      simplifies the work of developers in adding new tracepoints.
      Just the act of creating the trace points in include/trace and including
      define_trace.h will create the events in the debugfs/tracing/events
      directory.
      
      This patch removes the need of include/trace/trace_events.h
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      f42c85e7
    • S
      tracing/events: move declarations from trace directory to core include · 97f20251
      Steven Rostedt 提交于
      In preparation to allowing trace events to happen in modules, we need
      to move some of the local declarations in the kernel/trace directory
      into include/linux.
      
      This patch simply moves the declarations and performs no context changes.
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      97f20251
    • S
      tracing: make trace_seq operations available for core kernel · 9504504c
      Steven Rostedt 提交于
      In the process to make TRACE_EVENT macro work for modules, the trace_seq
      operations must be available for core kernel code.
      
      These operations are quite useful and can be used for other implementations.
      
      The main idea is that we create a trace_seq handle that acts very much
      like the seq_file handle.
      
      	struct trace_seq *s = kmalloc(sizeof(*s, GFP_KERNEL);
      
      	trace_seq_init(s);
      	trace_seq_printf(s, "some data %d\n", variable);
      
      	printk("%s", s->buffer);
      
      The main use is to allow a top level function call several other functions
      that may store printf like data into the buffer. Then at the end, the top
      level function can process all the data with any method it would like to.
      It could be passed to userspace, output via printk or even use seq_file:
      
      	trace_seq_to_user(s, ubuf, cnt);
      	seq_puts(m, s->buffer);
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      9504504c
    • S
      tracing: create automated trace defines · a8d154b0
      Steven Rostedt 提交于
      This patch lowers the number of places a developer must modify to add
      new tracepoints. The current method to add a new tracepoint
      into an existing system is to write the trace point macro in the
      trace header with one of the macros TRACE_EVENT, TRACE_FORMAT or
      DECLARE_TRACE, then they must add the same named item into the C file
      with the macro DEFINE_TRACE(name) and then add the trace point.
      
      This change cuts out the needing to add the DEFINE_TRACE(name).
      Every file that uses the tracepoint must still include the trace/<type>.h
      file, but the one C file must also add a define before the including
      of that file.
      
       #define CREATE_TRACE_POINTS
       #include <trace/mytrace.h>
      
      This will cause the trace/mytrace.h file to also produce the C code
      necessary to implement the trace point.
      
      Note, if more than one trace/<type>.h is used to create the C code
      it is best to list them all together.
      
       #define CREATE_TRACE_POINTS
       #include <trace/foo.h>
       #include <trace/bar.h>
       #include <trace/fido.h>
      
      Thanks to Mathieu Desnoyers and Christoph Hellwig for coming up with
      the cleaner solution of the define above the includes over my first
      design to have the C code include a "special" header.
      
      This patch converts sched, irq and lockdep and skb to use this new
      method.
      
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Neil Horman <nhorman@tuxdriver.com>
      Cc: Zhao Lei <zhaolei@cn.fujitsu.com>
      Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
      Cc: Pekka Enberg <penberg@cs.helsinki.fi>
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      a8d154b0
  2. 14 4月, 2009 18 次提交
    • S
      tracing: consolidate trace and trace_event headers · ea20d929
      Steven Rostedt 提交于
      Impact: clean up
      
      Neil Horman (et. al.) criticized the way the trace events were broken up
      into two files. The reason for that was that ftrace needed to separate out
      the declarations from where the #include <linux/tracepoint.h> was used.
      It then dawned on me that the tracepoint.h header only needs to define the
      TRACE_EVENT macro if it is not already defined.
      
      The solution is simply to test if TRACE_EVENT is defined, and if it is not
      then the linux/tracepoint.h header can define it. This change consolidates
      all the <traces>.h and <traces>_event_types.h into the <traces>.h file.
      Reported-by: NNeil Horman <nhorman@tuxdriver.com>
      Reported-by: NTheodore Tso <tytso@mit.edu>
      Reported-by: NJiaying Zhang <jiayingz@google.com>
      Cc: Zhaolei <zhaolei@cn.fujitsu.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Jason Baron <jbaron@redhat.com>
      Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
      Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      ea20d929
    • T
      tracing/filters: allow on-the-fly filter switching · 0a19e53c
      Tom Zanussi 提交于
      This patch allows event filters to be safely removed or switched
      on-the-fly while avoiding the use of rcu or the suspension of tracing of
      previous versions.
      
      It does it by adding a new filter_pred_none() predicate function which
      does nothing and by never deallocating either the predicates or any of
      the filter_pred members used in matching; the predicate lists are
      allocated and initialized during ftrace_event_calls initialization.
      
      Whenever a filter is removed or replaced, the filter_pred_* functions
      currently in use by the affected ftrace_event_call are immediately
      switched over to to the filter_pred_none() function, while the rest of
      the filter_pred members are left intact, allowing any currently
      executing filter_pred_* functions to finish up, using the values they're
      currently using.
      
      In the case of filter replacement, the new predicate values are copied
      into the old predicates after the above step, and the filter_pred_none()
      functions are replaced by the filter_pred_* functions for the new
      filter.  In this case, it is possible though very unlikely that a
      previous filter_pred_* is still running even after the
      filter_pred_none() switch and the switch to the new filter_pred_*.  In
      that case, however, because nothing has been deallocated in the
      filter_pred, the worst that can happen is that the old filter_pred_*
      function sees the new values and as a result produces either a false
      positive or a false negative, depending on the values it finds.
      
      So one downside to this method is that rarely, it can produce a bad
      match during the filter switch, but it should be possible to live with
      that, IMHO.
      
      The other downside is that at least in this patch the predicate lists
      are always pre-allocated, taking up memory from the start.  They could
      probably be allocated on first-use, and de-allocated when tracing is
      completely stopped - if this patch makes sense, I could create another
      one to do that later on.
      
      Oh, and it also places a restriction on the size of __arrays in events,
      currently set to 128, since they can't be larger than the now embedded
      str_val arrays in the filter_pred struct.
      Signed-off-by: NTom Zanussi <tzanussi@gmail.com>
      Acked-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: paulmck@linux.vnet.ibm.com
      LKML-Reference: <1239610670.6660.49.camel@tropicana>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      0a19e53c
    • I
      Merge branch 'linus' into tracing/core · b5c851a8
      Ingo Molnar 提交于
      Merge reason: merge latest tracing fixes to avoid conflicts in
                    kernel/trace/trace_events_filter.c with upcoming change
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      b5c851a8
    • T
      tracing/filters: use ring_buffer_discard_commit() in filter_check_discard() · eb02ce01
      Tom Zanussi 提交于
      This patch changes filter_check_discard() to make use of the new
      ring_buffer_discard_commit() function and modifies the current users to
      call the old commit function in the non-discard case.
      
      It also introduces a version of filter_check_discard() that uses the
      global trace buffer (filter_current_check_discard()) for those cases.
      
      v2 changes:
      
      - fix compile error noticed by Ingo Molnar
      Signed-off-by: NTom Zanussi <tzanussi@gmail.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: fweisbec@gmail.com
      LKML-Reference: <1239178554.10295.36.camel@tropicana>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      eb02ce01
    • T
      tracing/infrastructure: separate event tracer from event support · 5f77a88b
      Tom Zanussi 提交于
      Add a new config option, CONFIG_EVENT_TRACING that gets selected
      when CONFIG_TRACING is selected and adds everything needed by the stuff
      in trace_export - basically all the event tracing support needed by e.g.
      bprint, minus the actual events, which are only included if
      CONFIG_EVENT_TRACER is selected.
      
      So CONFIG_EVENT_TRACER can be used to turn on or off the generated events
      (what I think of as the 'event tracer'), while CONFIG_EVENT_TRACING turns
      on or off the base event tracing support used by both the event tracer and
      the other things such as bprint that can't be configured out.
      Signed-off-by: NTom Zanussi <tzanussi@gmail.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: fweisbec@gmail.com
      LKML-Reference: <1239178441.10295.34.camel@tropicana>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      5f77a88b
    • S
      tracing/filters: use ring_buffer_discard_commit for discarded events · 77d9f465
      Steven Rostedt 提交于
      The ring_buffer_discard_commit makes better usage of the ring_buffer
      when an event has been discarded. It tries to remove it completely if
      possible.
      
      This patch converts the trace event filtering to use
      ring_buffer_discard_commit instead of the ring_buffer_event_discard.
      Signed-off-by: NSteven Rostedt <srostedt@redhat.com>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      77d9f465
    • S
      ring-buffer: add ring_buffer_discard_commit · fa1b47dd
      Steven Rostedt 提交于
      The ring_buffer_discard_commit is similar to ring_buffer_event_discard
      but it can only be done on an event that has yet to be commited.
      Unpredictable results can happen otherwise.
      
      The main difference between ring_buffer_discard_commit and
      ring_buffer_event_discard is that ring_buffer_discard_commit will try
      to free the data in the ring buffer if nothing has addded data
      after the reserved event. If something did, then it acts almost the
      same as ring_buffer_event_discard followed by a
      ring_buffer_unlock_commit.
      
      Note, either ring_buffer_commit_discard and ring_buffer_unlock_commit
      can be called on an event, not both.
      
      This commit also exports both discard functions to be usable by
      GPL modules.
      Signed-off-by: NSteven Rostedt <srostedt@redhat.com>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      fa1b47dd
    • T
      tracing/filters: add TRACE_EVENT_FORMAT_NOFILTER event macro · e45f2e2b
      Tom Zanussi 提交于
      Frederic Weisbecker suggested that the trace_special event shouldn't be
      filterable; this patch adds a TRACE_EVENT_FORMAT_NOFILTER event macro
      that allows an event format to be exported without having a filter
      attached, and removes filtering from the trace_special event.
      Signed-off-by: NTom Zanussi <tzanussi@gmail.com>
      Signed-off-by: NSteven Rostedt <srostedt@redhat.com>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      e45f2e2b
    • T
      tracing/filters: add run-time field descriptions to TRACE_EVENT_FORMAT events · e1112b4d
      Tom Zanussi 提交于
      This patch adds run-time field descriptions to all the event formats
      exported using TRACE_EVENT_FORMAT.  It also hooks up all the tracers
      that use them (i.e. the tracers in the 'ftrace subsystem') so they can
      also have their output filtered by the event-filtering mechanism.
      
      When I was testing this, there were a couple of things that fooled me
      into thinking the filters weren't working, when actually they were -
      I'll mention them here so others don't make the same mistakes (and file
      bug reports. ;-)
      
      One is that some of the tracers trace multiple events e.g. the
      sched_switch tracer uses the context_switch and wakeup events, and if
      you don't set filters on all of the traced events, the unfiltered output
      from the events without filters on them can make it look like the
      filtering as a whole isn't working properly, when actually it is doing
      what it was asked to do - it just wasn't asked to do the right thing.
      
      The other is that for the really high-volume tracers e.g. the function
      tracer, the volume of filtered events can be so high that it pushes the
      unfiltered events out of the ring buffer before they can be read so e.g.
      cat'ing the trace file repeatedly shows either no output, or once in
      awhile some output but that isn't there the next time you read the
      trace, which isn't what you normally expect when reading the trace file.
      If you read from the trace_pipe file though, you can catch them before
      they disappear.
      
      Changes from v1:
      
      As suggested by Frederic Weisbecker:
      
      - get rid of externs in functions
      - added unlikely() to filter_check_discard()
      Signed-off-by: NTom Zanussi <tzanussi@gmail.com>
      Signed-off-by: NSteven Rostedt <srostedt@redhat.com>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      e1112b4d
    • L
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes · 80a04d3f
      Linus Torvalds 提交于
      * git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes:
        docbook: make cleandocs
        kbuild: fix spurious initramfs rebuild
        Documentation: explain the difference between __bitwise and __bitwise__
        kbuild: make it possible for the linker to discard local symbols from vmlinux
        kbuild: remove pointless strdup() on arguments passed to new_module() in modpost
        kbuild: fix a few typos in top-level Makefile
        kbuild: introduce destination-y for exported headers
        kbuild: use git svn instead of git-svn in setlocalversion
        kconfig: fix update-po-config to accect backslash in input
        kbuild: fix option processing for -I in headerdep
      80a04d3f
    • L
      Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev · eebb2afb
      Linus Torvalds 提交于
      * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
        ata: fix obviously wrong comment
        ahci: force CAP_NCQ for earlier NV MCPs
        [libata] sata_via: kill uninit'd var warning
      eebb2afb
    • L
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input · b534d388
      Linus Torvalds 提交于
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (22 commits)
        Input: i8042 - add HP DV9700 to the noloop list
        Input: arrange drivers/input/misc/Makefile in alphabetical order
        Input: add AD7879 Touchscreen driver
        Input: add AD7877 touchscreen driver
        Input: bf54x-keys - fix typo in warning
        Input: add driver for S1 button of rb532
        Input: generic driver for rotary encoders on GPIOs
        Input: hilkbd - fix crash when removing hilkbd module
        Input: atkbd - add quirk for Fujitsu Siemens Amilo PA 1510
        Input: atkbd - consolidate force release quirk setup
        Input: add accelerated touchscreen support for Marvell Zylonite
        Input: ucb1400_ts, mainstone-wm97xx - add BTN_TOUCH events
        Input: wm97xx - use disable_irq_nosync() for Mainstone
        Input: wm97xx - add BTN_TOUCH event to wm97xx to use it with Android
        Input: fix polling of /proc/bus/input/devices
        Input: psmouse - add newline to OLPC HGPK touchpad debugging
        Input: ati_remote2 - check module params
        Input: ati_remote2 - add per device attrs
        Input: ati_remote2 - complete suspend support
        Input: stop autorepeat timer on key release
        ...
      b534d388
    • R
      PM/Hibernate: Wait for SCSI devices scan to complete during resume · c7510859
      Rafael J. Wysocki 提交于
      There is a race between resume from hibernation and the asynchronous
      scanning of SCSI devices and to prevent it from happening we need to
      call scsi_complete_async_scans() during resume from hibernation.
      
      In addition, if the resume from hibernation is userland-driven, it's
      better to wait for all device probes in the kernel to complete before
      attempting to open the resume device.
      Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
      Acked-by: NArjan van de Ven <arjan@linux.intel.com>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      c7510859
    • L
      Merge git://git.infradead.org/iommu-2.6 · 7b11428d
      Linus Torvalds 提交于
      * git://git.infradead.org/iommu-2.6:
        intel-iommu: Avoid panic() for DRHD at address zero.
        Intel-IOMMU Alignment Issue in dma_pte_clear_range()
      7b11428d
    • L
      Merge branch 'x86-fixes-for-linus' of... · b8256b45
      Linus Torvalds 提交于
      Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
      
      * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
        x86: add linux kernel support for YMM state
        x86: fix wrong section of pat_disable & make it static
        x86: Fix section mismatches in mpparse
        x86: fix set_fixmap to use phys_addr_t
        x86: Document get_user_pages_fast()
        x86, intr-remap: fix eoi for interrupt remapping without x2apic
      b8256b45
    • L
      Merge branch 'tracing-fixes-for-linus' of... · 8255309b
      Linus Torvalds 提交于
      Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
      
      * 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
        tracing/filters: return proper error code when writing filter file
        tracing/filters: allow user input integer to be oct or hex
        tracing/filters: fix NULL pointer dereference
        tracing/filters: NIL-terminate user input filter
        ftrace: Output REC->var instead of __entry->var for trace format
        Make __stringify support variable argument macros too
        tracing: fix document references
        tracing: fix splice return too large
        tracing: update file->f_pos when splice(2) it
        tracing: allocate page when needed
        tracing: disable seeking for trace_pipe_raw
      8255309b
    • L
      Merge branch 'core-fixes-for-linus' of... · bf20753c
      Linus Torvalds 提交于
      Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
      
      * 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
        lockdep: continue lock debugging despite some taints
        lockdep: warn about lockdep disabling after kernel taint
      bf20753c
    • A
      cpufreq: use smp_call_function_[single|many]() in acpi-cpufreq.c · 01599fca
      Andrew Morton 提交于
      Atttempting to rid us of the problematic work_on_cpu().  Just use
      smp_call_fuction_single() here.
      
      This repairs a 10% sysbench(oltp)+mysql regression which Mike reported,
      due to
      
        commit 6b44003e
        Author: Andrew Morton <akpm@linux-foundation.org>
        Date:   Thu Apr 9 09:50:37 2009 -0600
      
            work_on_cpu(): rewrite it to create a kernel thread on demand
      
      It seems that the kernel calls these acpi-cpufreq functions at a quite
      high frequency.
      
      Valdis Kletnieks also reports that this causes 70-90 forks per second on
      his hardware.
      
      Cc: Valdis.Kletnieks@vt.edu
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Cc: Len Brown <len.brown@intel.com>
      Cc: Zhao Yakui <yakui.zhao@intel.com>
      Acked-by: NDave Jones <davej@redhat.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Tested-by: NMike Galbraith <efault@gmx.de>
      Cc: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Acked-by: NIngo Molnar <mingo@elte.hu>
      [ Made it use smp_call_function_many() instead of looping over cpu's
        with smp_call_function_single()    - Linus ]
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      01599fca
  3. 13 4月, 2009 12 次提交