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2009-10-01tracing: Fix infinite recursion in ftrace_update_pid_func()Matt Fleming1-0/+4
When CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST is enabled __ftrace_trace_function contains the current trace function, not ftrace_trace_function. In ftrace_update_pid_func() we currently incorrectly assign the value of ftrace_trace_function to __ftrace_trace_funcion before returning. Without this patch it is possible to execute an infinite recursion whereby ftrace_test_stop_func() calls __ftrace_trace_function, which was assigned ftrace_test_stop_func() in ftrace_update_pid_func(). Signed-off-by: Matt Fleming <[email protected]> Acked-by: Steven Rostedt <[email protected]> Cc: Frederic Weisbecker <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-09-26Merge branch 'tracing-fixes-for-linus' of ↵Linus Torvalds3-15/+17
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: modules, tracing: Remove stale struct marker signature from module_layout() tracing/workqueue: Use %pf in workqueue trace events tracing: Fix a comment and a trivial format issue in tracepoint.h tracing: Fix failure path in ftrace_regex_open() tracing: Fix failure path in ftrace_graph_write() tracing: Check the return value of trace_get_user() tracing: Fix off-by-one in trace_get_user()
2009-09-24tracing/filters: Unify the regex parsing helpersFrederic Weisbecker3-70/+23
The filter code has stolen the regex parsing function from ftrace to get the regex support. We have duplicated this code, so factorize it in the filter area and make it generally available, as the filter code is the most suited to host this feature. Signed-off-by: Frederic Weisbecker <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Tom Zanussi <[email protected]> Cc: Li Zefan <[email protected]>
2009-09-24tracing/filters: Provide basic regex supportFrederic Weisbecker2-25/+157
This patch provides basic support for regular expressions in filters. It supports the following types of regexp: - *match_beginning - *match_middle* - match_end* - !don't match Example: cd /debug/tracing/events/bkl/lock_kernel echo 'file == "*reiserfs*"' > filter echo 1 > enable gedit-4941 [000] 457.735437: lock_kernel: depth: 0, fs/reiserfs/namei.c:334 reiserfs_lookup() sync_supers-227 [001] 461.379985: lock_kernel: depth: 0, fs/reiserfs/super.c:69 reiserfs_sync_fs() sync_supers-227 [000] 461.383096: lock_kernel: depth: 0, fs/reiserfs/journal.c:1069 flush_commit_list() reiserfs/1-1369 [001] 461.479885: lock_kernel: depth: 0, fs/reiserfs/journal.c:3509 flush_async_commits() Every string is now handled as a regexp in the filter framework, which helps to factorize the code for handling both simple strings and regexp comparisons. (The regexp parsing code has been wildly cherry picked from ftrace.c written by Steve.) v2: Simplify the whole and drop the filter_regex file Signed-off-by: Frederic Weisbecker <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Tom Zanussi <[email protected]> Cc: Li Zefan <[email protected]>
2009-09-24sysctl: remove "struct file *" argument of ->proc_handlerAlexey Dobriyan2-4/+4
It's unused. It isn't needed -- read or write flag is already passed and sysctl shouldn't care about the rest. It _was_ used in two places at arch/frv for some reason. Signed-off-by: Alexey Dobriyan <[email protected]> Cc: David Howells <[email protected]> Cc: "Eric W. Biederman" <[email protected]> Cc: Al Viro <[email protected]> Cc: Ralf Baechle <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: James Morris <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2009-09-24tracing/event: Cleanup the useless dentry variableFrederic Weisbecker1-12/+11
Cleanup the useless dentry variable while creating a kernel event set of files. trace_create_file() warns if it fails to create the file anyway, and we don't store the dentry anywhere. v2: Fix a small conflict in kernel/trace/trace_events.c Signed-off-by: Frederic Weisbecker <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Li Zefan <[email protected]>
2009-09-24tracing/filters: Cleanup useless headersFrederic Weisbecker1-2/+0
Cleanup remaining headers inclusion that were only useful when the filter framework and its tracing related filesystem user interface weren't yet separated. v2: Keep module.h, needed for EXPORT_SYMBOL_GPL Signed-off-by: Frederic Weisbecker <[email protected]> Cc: Tom Zanussi <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Li Zefan <[email protected]>
2009-09-24cpumask: use zalloc_cpumask_var() where possibleLi Zefan1-5/+2
Remove open-coded zalloc_cpumask_var() and zalloc_cpumask_var_node(). Signed-off-by: Li Zefan <[email protected]> Signed-off-by: Rusty Russell <[email protected]>
2009-09-23Merge commit 'linus/master' into tracing/kprobesFrederic Weisbecker27-1114/+1256
Conflicts: kernel/trace/Makefile kernel/trace/trace.h kernel/trace/trace_event_types.h kernel/trace/trace_export.c Merge reason: Sync with latest significant tracing core changes.
2009-09-23seq_file: constify seq_operationsJames Morris2-4/+4
Make all seq_operations structs const, to help mitigate against revectoring user-triggerable function pointers. This is derived from the grsecurity patch, although generated from scratch because it's simpler than extracting the changes from there. Signed-off-by: James Morris <[email protected]> Acked-by: Serge Hallyn <[email protected]> Acked-by: Casey Schaufler <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2009-09-22Merge branch 'for-linus' of ↵Linus Torvalds2-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (34 commits) trivial: fix typo in aic7xxx comment trivial: fix comment typo in drivers/ata/pata_hpt37x.c trivial: typo in kernel-parameters.txt trivial: fix typo in tracing documentation trivial: add __init/__exit macros in drivers/gpio/bt8xxgpio.c trivial: add __init macro/ fix of __exit macro location in ipmi_poweroff.c trivial: remove unnecessary semicolons trivial: Fix duplicated word "options" in comment trivial: kbuild: remove extraneous blank line after declaration of usage() trivial: improve help text for mm debug config options trivial: doc: hpfall: accept disk device to unload as argument trivial: doc: hpfall: reduce risk that hpfall can do harm trivial: SubmittingPatches: Fix reference to renumbered step trivial: fix typos "man[ae]g?ment" -> "management" trivial: media/video/cx88: add __init/__exit macros to cx88 drivers trivial: fix typo in CONFIG_DEBUG_FS in gcov doc trivial: fix missing printk space in amd_k7_smp_check trivial: fix typo s/ketymap/keymap/ in comment trivial: fix typo "to to" in multiple files trivial: fix typos in comments s/DGBU/DBGU/ ...
2009-09-22tracing: Fix failure path in ftrace_regex_open()Li Zefan1-1/+3
Don't forget to free trace_parser if seq_open() returned failure. Signed-off-by: Li Zefan <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Steven Rostedt <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-09-22tracing: Fix failure path in ftrace_graph_write()Li Zefan1-4/+6
Don't call trace_parser_put() on uninitialized trace_parser. Signed-off-by: Li Zefan <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Steven Rostedt <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-09-22tracing: Check the return value of trace_get_user()Li Zefan2-9/+7
Return immediately if trace_get_user() returned failure. Signed-off-by: Li Zefan <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Steven Rostedt <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-09-22tracing: Fix off-by-one in trace_get_user()Li Zefan1-1/+1
Leave the last slot for the tailing '\0'. Signed-off-by: Li Zefan <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Steven Rostedt <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-09-21Merge branch 'perfcounters-rename-for-linus' of ↵Linus Torvalds1-3/+3
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perfcounters-rename-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf: Tidy up after the big rename perf: Do the big rename: Performance Counters -> Performance Events perf_counter: Rename 'event' to event_id/hw_event perf_counter: Rename list_entry -> group_entry, counter_list -> group_list Manually resolved some fairly trivial conflicts with the tracing tree in include/trace/ftrace.h and kernel/trace/trace_syscalls.c.
2009-09-21Merge branch 'sched-fixes-for-linus' of ↵Linus Torvalds1-1/+7
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: Simplify sys_sched_rr_get_interval() system call sched: Fix potential NULL derference of doms_cur sched: Fix raciness in runqueue_is_locked() sched: Re-add lost cpu_allowed check to sched_fair.c::select_task_rq_fair() sched: Remove unneeded indentation in sched_fair.c::place_entity()
2009-09-21Merge branch 'tracing-fixes-for-linus' of ↵Linus Torvalds6-108/+193
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: kernel/profile.c: Switch /proc/irq/prof_cpu_mask to seq_file tracing: Export trace_profile_buf symbols tracing/events: use list_for_entry_continue tracing: remove max_tracer_type_len function-graph: use ftrace_graph_funcs directly tracing: Remove markers tracing: Allocate the ftrace event profile buffer dynamically tracing: Factorize the events profile accounting
2009-09-21trivial: remove unnecessary semicolonsJoe Perches1-1/+1
Signed-off-by: Joe Perches <[email protected]> Signed-off-by: Jiri Kosina <[email protected]>
2009-09-21trivial: Fix duplicated word "options" in commentUwe Kleine-Koenig1-1/+1
this was introduced in 5e0a093 (tracing: fix config options to not show when automatically selected) Signed-off-by: Uwe Kleine-Koenig <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: [email protected] Signed-off-by: Jiri Kosina <[email protected]>
2009-09-21perf: Do the big rename: Performance Counters -> Performance EventsIngo Molnar1-3/+3
Bye-bye Performance Counters, welcome Performance Events! In the past few months the perfcounters subsystem has grown out its initial role of counting hardware events, and has become (and is becoming) a much broader generic event enumeration, reporting, logging, monitoring, analysis facility. Naming its core object 'perf_counter' and naming the subsystem 'perfcounters' has become more and more of a misnomer. With pending code like hw-breakpoints support the 'counter' name is less and less appropriate. All in one, we've decided to rename the subsystem to 'performance events' and to propagate this rename through all fields, variables and API names. (in an ABI compatible fashion) The word 'event' is also a bit shorter than 'counter' - which makes it slightly more convenient to write/handle as well. Thanks goes to Stephane Eranian who first observed this misnomer and suggested a rename. User-space tooling and ABI compatibility is not affected - this patch should be function-invariant. (Also, defconfigs were not touched to keep the size down.) This patch has been generated via the following script: FILES=$(find * -type f | grep -vE 'oprofile|[^K]config') sed -i \ -e 's/PERF_EVENT_/PERF_RECORD_/g' \ -e 's/PERF_COUNTER/PERF_EVENT/g' \ -e 's/perf_counter/perf_event/g' \ -e 's/nb_counters/nb_events/g' \ -e 's/swcounter/swevent/g' \ -e 's/tpcounter_event/tp_event/g' \ $FILES for N in $(find . -name perf_counter.[ch]); do M=$(echo $N | sed 's/perf_counter/perf_event/g') mv $N $M done FILES=$(find . -name perf_event.*) sed -i \ -e 's/COUNTER_MASK/REG_MASK/g' \ -e 's/COUNTER/EVENT/g' \ -e 's/\<event\>/event_id/g' \ -e 's/counter/event/g' \ -e 's/Counter/Event/g' \ $FILES ... to keep it as correct as possible. This script can also be used by anyone who has pending perfcounters patches - it converts a Linux kernel tree over to the new naming. We tried to time this change to the point in time where the amount of pending patches is the smallest: the end of the merge window. Namespace clashes were fixed up in a preparatory patch - and some stylistic fallout will be fixed up in a subsequent patch. ( NOTE: 'counters' are still the proper terminology when we deal with hardware registers - and these sed scripts are a bit over-eager in renaming them. I've undone some of that, but in case there's something left where 'counter' would be better than 'event' we can undo that on an individual basis instead of touching an otherwise nicely automated patch. ) Suggested-by: Stephane Eranian <[email protected]> Acked-by: Peter Zijlstra <[email protected]> Acked-by: Paul Mackerras <[email protected]> Reviewed-by: Arjan van de Ven <[email protected]> Cc: Mike Galbraith <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: David Howells <[email protected]> Cc: Kyle McMartin <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: <[email protected]> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <[email protected]>
2009-09-20Merge git://git.kernel.org/pub/scm/linux/kernel/git/jaswinder/linux-2.6Linus Torvalds1-2/+0
* git://git.kernel.org/pub/scm/linux/kernel/git/jaswinder/linux-2.6: includecheck fix: x86, cpu/common.c includecheck fix: kernel/trace, ring_buffer.c includecheck fix: include/linux, ftrace.h includecheck fix: include/linux, page_cgroup.h includecheck fix: include/linux, aio.h includecheck fix: include/drm, drm_memory.h includecheck fix: include/acpi, acpi_bus.h includecheck fix: drivers/xen, evtchn.c includecheck fix: drivers/video, vgacon.c includecheck fix: drivers/scsi, ibmvscsi.c includecheck fix: drivers/scsi, libfcoe.c includecheck fix: x86, shadow.c includecheck fix: x86, traps.c includecheck fix: um, helper.c includecheck fix: s390, sys_s390.c
2009-09-20sched: Fix raciness in runqueue_is_locked()Andrew Morton1-1/+7
runqueue_is_locked() is unavoidably racy due to a poor interface design. It does cpu = get_cpu() ret = some_perpcu_thing(cpu); put_cpu(cpu); return ret; Its return value is unreliable. Fix. Signed-off-by: Andrew Morton <[email protected]> Acked-by: Steven Rostedt <[email protected]> Cc: Peter Zijlstra <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-09-20tracing: Export trace_profile_buf symbolsPeter Zijlstra1-1/+4
ERROR: "trace_profile_buf_nmi" [fs/jbd2/jbd2.ko] undefined! ERROR: "trace_profile_buf" [fs/jbd2/jbd2.ko] undefined! ERROR: "trace_profile_buf_nmi" [fs/ext4/ext4.ko] undefined! ERROR: "trace_profile_buf" [fs/ext4/ext4.ko] undefined! ERROR: "trace_profile_buf_nmi" [arch/x86/kvm/kvm.ko] undefined! ERROR: "trace_profile_buf" [arch/x86/kvm/kvm.ko] undefined! Signed-off-by: Peter Zijlstra <[email protected]> Acked-by: Steven Rostedt <[email protected]> Cc: Frederic Weisbecker <[email protected]> LKML-Reference: <1253442878.7542.3.camel@laptop> [ fixed whitespace noise and checkpatch complaint ] Signed-off-by: Ingo Molnar <[email protected]>
2009-09-20includecheck fix: kernel/trace, ring_buffer.cJaswinder Singh Rajput1-2/+0
fix the following 'make includecheck' warning: kernel/trace/ring_buffer.c: trace.h is included more than once. Signed-off-by: Jaswinder Singh Rajput <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Sam Ravnborg <[email protected]> LKML-Reference: <[email protected]>
2009-09-19Merge branch 'tip/tracing/core' of ↵Ingo Molnar3-86/+35
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/urgent
2009-09-19tracing/events: use list_for_entry_continueLi Zefan1-34/+15
Simplify s_next() and t_next(). Acked-by: Frederic Weisbecker <[email protected]> Signed-off-by: Li Zefan <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Steven Rostedt <[email protected]>
2009-09-19tracing: remove max_tracer_type_lenLi Zefan1-33/+16
Limit the length of a tracer's name within 100 chars, and then we don't have to play with max_tracer_type_len. Acked-by: Frederic Weisbecker <[email protected]> Signed-off-by: Li Zefan <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Steven Rostedt <[email protected]>
2009-09-19function-graph: use ftrace_graph_funcs directlyLi Zefan1-19/+4
No need to store ftrace_graph_funcs in file->private. Acked-by: Frederic Weisbecker <[email protected]> Signed-off-by: Li Zefan <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Steven Rostedt <[email protected]>
2009-09-19Merge branch 'tracing/core-v3' of ↵Ingo Molnar2-21/+155
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into tracing/urgent
2009-09-19tracing, perf: Convert the power tracer into an event tracerArjan van de Ven5-239/+21
This patch converts the existing power tracer into an event tracer, so that power events (C states and frequency changes) can be tracked via "perf". This also removes the perl script that was used to demo the tracer; its functionality is being replaced entirely with timechart. Signed-off-by: Arjan van de Ven <[email protected]> Acked-by: Peter Zijlstra <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Frederic Weisbecker <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-09-18tracing: Remove markersChristoph Hellwig1-1/+0
Now that the last users of markers have migrated to the event tracer we can kill off the (now orphan) support code. Signed-off-by: Christoph Hellwig <[email protected]> Acked-by: Mathieu Desnoyers <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Frederic Weisbecker <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2009-09-18tracing: Allocate the ftrace event profile buffer dynamicallyFrederic Weisbecker2-20/+138
Currently the trace event profile buffer is allocated in the stack. But this may be too much for the stack, as the events can have large statically defined field size and can also grow with dynamic arrays. Allocate two per cpu buffer for all profiled events. The first cpu buffer is used to host every non-nmi context traces. It is protected by disabling the interrupts while writing and committing the trace. The second buffer is reserved for nmi. So that there is no race between them and the first buffer. The whole write/commit section is rcu protected because we release these buffers while deactivating the last profiling trace event. v2: Move the buffers from trace_event to be global, as pointed by Steven Rostedt. v3: Fix the syscall events to handle the profiling buffer races by disabling interrupts, now that the buffers are globals. Suggested-by: Steven Rostedt <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Li Zefan <[email protected]> Cc: Jason Baron <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Ingo Molnar <[email protected]>
2009-09-18tracing: Factorize the events profile accountingFrederic Weisbecker1-2/+18
Factorize the events enabling accounting in a common tracing core helper. This reduces the size of the profile_enable() and profile_disable() callbacks for each trace events. Signed-off-by: Frederic Weisbecker <[email protected]> Acked-by: Steven Rostedt <[email protected]> Acked-by: Li Zefan <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Jason Baron <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Ingo Molnar <[email protected]>
2009-09-17tracing: switch function prints from %pf to %psSteven Rostedt3-7/+7
For direct function pointers (like what mcount provides) PowerPC64 requires the use of %ps, otherwise nothing is printed. This patch converts all prints of functions retrieved through mcount to use the %ps format from the %pf. Signed-off-by: Steven Rostedt <[email protected]>
2009-09-17Merge branch 'linus' into tracing/coreIngo Molnar1-3/+3
Merge reason: Pick up kernel/softirq.c update for dependent fix. Signed-off-by: Ingo Molnar <[email protected]>
2009-09-17tracing/kprobes: Disable kprobe events by default after creationMasami Hiramatsu1-2/+2
Disable newly created kprobe events by default, not to disturb another user using ftrace. "Disturb" means when someone is using ftrace and another user tries to use perf-tools, (in near future) if he defines new kprobe event via perf-tools, then new events will mess up the frace buffer. Fix this to allow proper and transparent kprobes events concurrent usage between ftrace users and perf users. Signed-off-by: Masami Hiramatsu <[email protected]> Acked-by: Steven Rostedt <[email protected]> Cc: Jim Keniston <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Frank Ch. Eigler <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jason Baron <[email protected]> Cc: K.Prasad <[email protected]> Cc: Lai Jiangshan <[email protected]> Cc: Li Zefan <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Srikar Dronamraju <[email protected]> Cc: Tom Zanussi <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]>
2009-09-17tracing/kprobes: Fix profiling alignment for perf_counter bufferMasami Hiramatsu1-5/+12
Fix *probe_profile_func() to align buffer size, since perf_counter requires its buffer entries to be 8 bytes aligned. Signed-off-by: Masami Hiramatsu <[email protected]> Acked-by: Steven Rostedt <[email protected]> Cc: Jim Keniston <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Frank Ch. Eigler <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jason Baron <[email protected]> Cc: K.Prasad <[email protected]> Cc: Lai Jiangshan <[email protected]> Cc: Li Zefan <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Srikar Dronamraju <[email protected]> Cc: Tom Zanussi <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]>
2009-09-17tracing/kprobes: Add probe handler dispatcher to support perf and ftrace ↵Masami Hiramatsu1-22/+63
concurrent use Add kprobe_dispatcher and kretprobe_dispatcher to dispatch event in both profile and tracing handlers. This allows simultaneous kprobe uses by ftrace and perf. Signed-off-by: Masami Hiramatsu <[email protected]> Acked-by: Steven Rostedt <[email protected]> Cc: Jim Keniston <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Frank Ch. Eigler <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jason Baron <[email protected]> Cc: K.Prasad <[email protected]> Cc: Lai Jiangshan <[email protected]> Cc: Li Zefan <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Srikar Dronamraju <[email protected]> Cc: Tom Zanussi <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]>
2009-09-17ftrace: Fix trace_remove_event_call() to lock trace_event_mutexMasami Hiramatsu1-0/+5
Lock not only event_mutex but also trace_event_mutex in trace_remove_event_call() to protect __unregister_ftrace_event(). Signed-off-by: Masami Hiramatsu <[email protected]> Acked-by: Steven Rostedt <[email protected]> Cc: Jim Keniston <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Frank Ch. Eigler <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jason Baron <[email protected]> Cc: K.Prasad <[email protected]> Cc: Lai Jiangshan <[email protected]> Cc: Li Zefan <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Srikar Dronamraju <[email protected]> Cc: Tom Zanussi <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]>
2009-09-17ftrace: Fix trace_add_event_call() to initialize listMasami Hiramatsu1-1/+4
Handle failure path in trace_add_event_call() to fix the below bug which occurred when I tried to add invalid event twice. Could not create debugfs 'kmalloc' directory Failed to register kprobe event: kmalloc Faild to register probe event(-1) ------------[ cut here ]------------ WARNING: at /home/mhiramat/ksrc/random-tracing/lib/list_debug.c:26 __list_add+0x27/0x5c() Hardware name: list_add corruption. next->prev should be prev (c07d78cc), but was 00001000. (next=d854236c). Modules linked in: sunrpc uinput virtio_net virtio_balloon i2c_piix4 pcspkr i2c_core virtio_blk virtio_pci virtio_ring virtio [last unloaded: scsi_wait_scan] Pid: 1394, comm: tee Not tainted 2.6.31-rc9 #51 Call Trace: [<c0438424>] warn_slowpath_common+0x65/0x7c [<c05371b3>] ? __list_add+0x27/0x5c [<c043846f>] warn_slowpath_fmt+0x24/0x27 [<c05371b3>] __list_add+0x27/0x5c [<c047f050>] list_add+0xa/0xc [<c047f8f5>] trace_add_event_call+0x60/0x97 [<c0483133>] command_trace_probe+0x42c/0x51b [<c044a1b3>] ? remove_wait_queue+0x22/0x27 [<c042a9c0>] ? __wake_up+0x32/0x3b [<c04832f6>] probes_write+0xd4/0x10a [<c0483222>] ? probes_write+0x0/0x10a [<c04b27a9>] vfs_write+0x80/0xdf [<c04b289c>] sys_write+0x3b/0x5d [<c0670d41>] syscall_call+0x7/0xb ---[ end trace 2b962b5dc1fdc07d ]--- Signed-off-by: Masami Hiramatsu <[email protected]> Acked-by: Steven Rostedt <[email protected]> Cc: Jim Keniston <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Frank Ch. Eigler <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jason Baron <[email protected]> Cc: K.Prasad <[email protected]> Cc: Lai Jiangshan <[email protected]> Cc: Li Zefan <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Srikar Dronamraju <[email protected]> Cc: Tom Zanussi <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]>
2009-09-17tracing/kprobes: Fix trace_probe registration orderMasami Hiramatsu1-23/+19
Fix trace_probe registration order. ftrace_event_call and ftrace_event must be registered before kprobe/kretprobe, because tracing/profiling handlers dereference the event-id. Signed-off-by: Masami Hiramatsu <[email protected]> Acked-by: Steven Rostedt <[email protected]> Cc: Jim Keniston <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Frank Ch. Eigler <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jason Baron <[email protected]> Cc: K.Prasad <[email protected]> Cc: Lai Jiangshan <[email protected]> Cc: Li Zefan <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Srikar Dronamraju <[email protected]> Cc: Tom Zanussi <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]>
2009-09-17tracing/kprobes: Support custom subsystem for each kprobe eventMasami Hiramatsu1-6/+27
Support specifying a custom subsystem(group) for each kprobe event. This allows users to create new group to control several probes at once, or add events to existing groups as additional tracepoints. New synopsis: p[:[subsys/]event-name] KADDR|KSYM[+offs] [ARGS] Signed-off-by: Masami Hiramatsu <[email protected]> Cc: Jim Keniston <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Frank Ch. Eigler <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jason Baron <[email protected]> Cc: K.Prasad <[email protected]> Cc: Lai Jiangshan <[email protected]> Cc: Li Zefan <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Srikar Dronamraju <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Tom Zanussi <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]>
2009-09-16tracing: Fix minor bugs for __unregister_ftrace_function_probeAtsushi Tsuji1-2/+2
Fix the condition of strcmp for "*". Also fix NULL pointer dereference when glob is NULL. Signed-off-by: Atsushi Tsuji <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Steven Rostedt <[email protected]>
2009-09-15Merge branch 'for-linus' of ↵Linus Torvalds1-3/+3
git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (46 commits) powerpc64: convert to dynamic percpu allocator sparc64: use embedding percpu first chunk allocator percpu: kill lpage first chunk allocator x86,percpu: use embedding for 64bit NUMA and page for 32bit NUMA percpu: update embedding first chunk allocator to handle sparse units percpu: use group information to allocate vmap areas sparsely vmalloc: implement pcpu_get_vm_areas() vmalloc: separate out insert_vmalloc_vm() percpu: add chunk->base_addr percpu: add pcpu_unit_offsets[] percpu: introduce pcpu_alloc_info and pcpu_group_info percpu: move pcpu_lpage_build_unit_map() and pcpul_lpage_dump_cfg() upward percpu: add @align to pcpu_fc_alloc_fn_t percpu: make @dyn_size mandatory for pcpu_setup_first_chunk() percpu: drop @static_size from first chunk allocators percpu: generalize first chunk allocator selection percpu: build first chunk allocators selectively percpu: rename 4k first chunk allocator to page percpu: improve boot messages percpu: fix pcpu_reclaim() locking ... Fix trivial conflict as by Tejun Heo in kernel/sched.c
2009-09-15tracing: optimize global_trace_clock cachelinesSteven Rostedt1-10/+14
The prev_trace_clock_time is only read or written to when the trace_clock_lock is taken. For better perfomance, they should share the same cache line. Reported-by: Peter Zijlstra <[email protected]> Signed-off-by: Steven Rostedt <[email protected]>
2009-09-14ftrace: document function and function graph implementationMike Frysinger1-3/+13
While implementing function tracer and function tracer graph support, I found the exact arch implementation details to be a bit lacking (and my x86 foo ain't great). So after pounding out support for the Blackfin arch, start documenting the requirements/details. Signed-off-by: Mike Frysinger <[email protected]> LKML-Reference: <[email protected]> Acked-by: Frederic Weisbecker <[email protected]> Signed-off-by: Steven Rostedt <[email protected]>
2009-09-14tracing: make testing syscall events a separate configurationSteven Rostedt2-0/+24
Parag noticed that the number of event tests has increased tremendously: grep "Testing event" dmesg.31rc9 |wc -l 100 grep "Testing event" dmesg.31git |wc -l 1172 This is due to the testing of every syscall event when ftrace self test is enabled. This adds a bit more time to kernel boot up and can affect development by slowing down the time it takes between reboots. This option makes the testing of the syscall events into a separate config, to still be able to test most of ftrace internals at boot up but not have to wait for all the syscall events to be tested. The syscall event testing only tests the enabling and disabling of the trace point, since the syscalls are not executed. What really needs to be done is to somehow have a userspace tool test the syscall tracepoints as well. Reported-by: Parag Warudkar <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Steven Rostedt <[email protected]>
2009-09-14tracing: remove some unused macrosLi Zefan2-35/+0
- remove FTRACE_ENTRY_STRUCT_ONLY() - remove TRACE_XXX() macros Signed-off-by: Li Zefan <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Steven Rostedt <[email protected]>
2009-09-14ftrace: add compile-time check on F_printk()Li Zefan1-4/+41
Make sure F_printk() has corrent format and args, and make sure changes in F_STRUCT() won't break F_printk(). Signed-off-by: Li Zefan <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Steven Rostedt <[email protected]>
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