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* tracing: Use one prologue for the preempt irqs off tracer function tracersSteven Rostedt2010-10-181-48/+48
| | | | | | | | | | | | | The preempt and irqsoff tracers have three types of function tracers. Normal function tracer, function graph entry, and function graph return. Each of these use a complex dance to prevent recursion and whether to trace the data or not (depending if interrupts are enabled or not). This patch moves the duplicate code into a single routine, to prevent future mistakes with modifying duplicate complex code. Cc: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
* tracing: Use one prologue for the wakeup tracer function tracersSteven Rostedt2010-10-181-52/+50
| | | | | | | | | | | | | The wakeup tracer has three types of function tracers. Normal function tracer, function graph entry, and function graph return. Each of these use a complex dance to prevent recursion and whether to trace the data or not (depending on the wake_task variable). This patch moves the duplicate code into a single routine, to prevent future mistakes with modifying duplicate complex code. Cc: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
* tracing: Graph support for wakeup tracerJiri Olsa2010-10-181-10/+221
| | | | | | | | | | Add function graph support for wakeup latency tracer. The graph output is enabled by setting the 'display-graph' trace option. Signed-off-by: Jiri Olsa <jolsa@redhat.com> LKML-Reference: <1285243253-7372-4-git-send-email-jolsa@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
* tracing: Make graph related irqs/preemptsoff functions globalJiri Olsa2010-10-183-52/+71
| | | | | | | | | Move trace_graph_function() and print_graph_headers_flags() functions to the trace_function_graph.c to be globaly available. Signed-off-by: Jiri Olsa <jolsa@redhat.com> LKML-Reference: <1285243253-7372-3-git-send-email-jolsa@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
* tracing: Add proper check for irq_depth routinesJiri Olsa2010-10-181-4/+20
| | | | | | | | | | | | | The check_irq_entry and check_irq_return could be called from graph event context. In such case there's no graph private data allocated. Adding checks to handle this case. Signed-off-by: Jiri Olsa <jolsa@redhat.com> LKML-Reference: <20100924154102.GB1818@jolsa.brq.redhat.com> [ Fixed some grammar in the comments ] Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
* tracing/trivial: Remove cast from void*matt mooney2010-10-182-3/+3
| | | | | | | Unnecessary cast from void* in assignment. Signed-off-by: matt mooney <mfm@muteddisk.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
* Merge branch 'core' of ↵Ingo Molnar2010-10-1618-510/+510
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile into perf/core
| * oprofile: make !CONFIG_PM function stubs static inlineRobert Richter2010-10-151-2/+6
| | | | | | | | | | | | | | Make !CONFIG_PM function stubs static inline and remove section attribute. Signed-off-by: Robert Richter <robert.richter@amd.com>
| * oprofile: fix linker errorsAnand Gadiyar2010-10-152-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit e9677b3ce (oprofile, ARM: Use oprofile_arch_exit() to cleanup on failure) caused oprofile_perf_exit to be called in the cleanup path of oprofile_perf_init. The __exit tag for oprofile_perf_exit should therefore be dropped. The same has to be done for exit_driverfs as well, as this function is called from oprofile_perf_exit. Else, we get the following two linker errors. LD .tmp_vmlinux1 `oprofile_perf_exit' referenced in section `.init.text' of arch/arm/oprofile/built-in.o: defined in discarded section `.exit.text' of arch/arm/oprofile/built-in.o make: *** [.tmp_vmlinux1] Error 1 LD .tmp_vmlinux1 `exit_driverfs' referenced in section `.text' of arch/arm/oprofile/built-in.o: defined in discarded section `.exit.text' of arch/arm/oprofile/built-in.o make: *** [.tmp_vmlinux1] Error 1 Signed-off-by: Anand Gadiyar <gadiyar@ti.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| * oprofile: include platform_device.h to fix build breakAnand Gadiyar2010-10-151-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | oprofile_perf.c needs to include platform_device.h Otherwise we get the following build break. CC arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.o arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c:192: warning: 'struct platform_device' declared inside parameter list arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c:192: warning: its scope is only this definition or declaration, which is probably not what you want arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c:201: warning: 'struct platform_device' declared inside parameter list arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c:210: error: variable 'oprofile_driver' has initializer but incomplete type arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c:211: error: unknown field 'driver' specified in initializer arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c:211: error: extra brace group at end of initializer arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c:211: error: (near initialization for 'oprofile_driver') arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c:213: warning: excess elements in struct initializer arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c:213: warning: (near initialization for 'oprofile_driver') arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c:214: error: unknown field 'resume' specified in initializer arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c:214: warning: excess elements in struct initializer arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c:214: warning: (near initialization for 'oprofile_driver') arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c:215: error: unknown field 'suspend' specified in initializer arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c:215: warning: excess elements in struct initializer arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c:215: warning: (near initialization for 'oprofile_driver') arch/arm/oprofile/../../../drivers/oprofile/oprofile_perf.c: In function 'init_driverfs': Signed-off-by: Anand Gadiyar <gadiyar@ti.com> Cc: Matt Fleming <matt@console-pimps.org> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| * Merge remote branch 'tip/perf/core' into oprofile/coreRobert Richter2010-10-15463-3829/+8360
| |\ | | | | | | | | | | | | | | | Conflicts: arch/arm/oprofile/common.c kernel/perf_event.c
| * | oprofile: disable write access to oprofilefs while profiler is runningRobert Richter2010-10-124-20/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Oprofile counters are setup when profiling is disabled. Thus, writing to oprofilefs has no immediate effect. Changes are updated only after oprofile is reenabled. To keep userland and kernel states synchronized, we now allow configuration of oprofile only if profiling is disabled. In this case it checks if the profiler is running and then disables write access to oprofilefs by returning -EBUSY. The change should be backward compatible with current oprofile userland daemon. Acked-by: Maynard Johnson <maynardj@us.ibm.com> Cc: William Cohen <wcohen@redhat.com> Cc: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | Merge branch 'oprofile/perf' into oprofile/coreRobert Richter2010-10-1112-431/+412
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/arm/oprofile/common.c Signed-off-by: Robert Richter <robert.richter@amd.com>
| | * | oprofile, ARM: Use oprofile_arch_exit() to cleanup on failureRobert Richter2010-10-111-28/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is duplicate cleanup code in the init and exit functions. Now, oprofile_arch_exit() is also used if oprofile_arch_init() fails. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| | * | oprofile, ARM: Rework op_create_counter()Robert Richter2010-10-111-10/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch simplifies op_create_counter(). Removing if/else if paths and return code variable by direct returning from function. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| | * | oprofile, ARM: Remove some goto statementsRobert Richter2010-10-111-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes some unnecessary goto statements. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| | * | Merge branch 'oprofile/core' (early part) into oprofile/perfRobert Richter2010-10-112-19/+60
| | |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/arm/oprofile/common.c Signed-off-by: Robert Richter <robert.richter@amd.com>
| | * | | oprofile, ARM: Release resources on failureRobert Richter2010-10-111-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes a resource leak on failure, where the oprofilefs and some counters may not released properly. Signed-off-by: Robert Richter <robert.richter@amd.com> Acked-by: Will Deacon <will.deacon@arm.com> Cc: linux-arm-kernel@lists.infradead.org Cc: <stable@kernel.org> # .35.x LKML-Reference: <20100929145225.GJ13563@erda.amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | Merge branch 'oprofile/urgent' (early part) into oprofile/perfRobert Richter2010-10-11652-4240/+7464
| | |\ \ \
| | * | | | sh: oprofile: Use perf-events oprofile backendMatt Fleming2010-10-114-125/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that we've got a generic perf-events based oprofile backend we might as well make use of it seeing as SH doesn't do anything special with its oprofile backend. Also introduce a new CONFIG_HW_PERF_EVENTS symbol so that we can fallback to using the timer interrupt for oprofile if the CPU doesn't support perf events. Also, to avoid a section mismatch warning we need to annotate oprofile_arch_exit() with an __exit marker. Signed-off-by: Matt Fleming <matt@console-pimps.org> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Robert Richter <robert.richter@amd.com>
| | * | | | oprofile: Abstract the perf-events backendMatt Fleming2010-10-114-319/+333
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move the perf-events backend from arch/arm/oprofile into drivers/oprofile so that the code can be shared between architectures. This allows each architecture to maintain only a single copy of the PMU accessor functions instead of one for both perf and OProfile. It also becomes possible for other architectures to delete much of their OProfile code in favour of the common code now available in drivers/oprofile/oprofile_perf.c. Signed-off-by: Matt Fleming <matt@console-pimps.org> Tested-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| | * | | | ARM: oprofile: Move non-ARM code into separate init/exitMatt Fleming2010-10-111-3/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In preparation for moving the majority of this oprofile code into an architecture-neutral place separate the architecture-independent code into oprofile_perf_init() and oprofile_perf_exit(). Signed-off-by: Matt Fleming <matt@console-pimps.org> Tested-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| | * | | | ARM: oprofile: Rename op_arm to oprofile_perfMatt Fleming2010-10-111-34/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In preparation for moving the generic functions out of this file, give the functions more general names (e.g. remove "arm" from the names). Signed-off-by: Matt Fleming <matt@console-pimps.org> Tested-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| | * | | | oprofile: Make op_name_from_perf_id() globalMatt Fleming2010-10-112-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make op_name_from_perf_id() global so that we have a way for each architecture to construct an oprofile name for op->cpu_type. We need to remove the argument from the function prototype so that we can hide all implementation details inside the function. Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Robert Richter <robert.richter@amd.com>
| | * | | | perf: New helper function for pmu nameMatt Fleming2010-10-113-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce perf_pmu_name() helper function that returns the name of the pmu. This gives us a generic way to get the name of a pmu regardless of how an architecture identifies it internally. Signed-off-by: Matt Fleming <matt@console-pimps.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Robert Richter <robert.richter@amd.com>
| | * | | | perf: Add helper function to return number of countersMatt Fleming2010-10-114-13/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The number of counters for the registered pmu is needed in a few places so provide a helper function that returns this number. Signed-off-by: Matt Fleming <matt@console-pimps.org> Tested-by: Will Deacon <will.deacon@arm.com> Acked-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | | | | oprofile: Remove duplicate code around __oprofilefs_create_file()Robert Richter2010-10-041-32/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Removing duplicate code by assigning the inodes private data pointer in __oprofilefs_create_file(). Extending the function interface to pass the pointer. Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | | | | oprofile, ARM: Remove some goto statementsRobert Richter2010-10-041-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes some unnecessary goto statements. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | | | | oprofile, ARM: Rework op_create_counter()Robert Richter2010-10-041-10/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch simplifies op_create_counter(). Removing if/else if paths and return code variable by direct returning from function. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | | | | oprofile, ARM: Use oprofile_arch_exit() to cleanup on failureRobert Richter2010-10-041-27/+26
| | |_|/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is duplicate cleanup code in the init and exit functions. Now, oprofile_arch_exit() is also used if oprofile_arch_init() fails. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | | | oprofile, x86: Simplify init/exit functionsRobert Richter2010-10-011-8/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now, that we only call the exit function if init succeeds with commit: 979048e oprofile: don't call arch exit code from init code on failure we can simplify the x86 init/exit functions too. Variable using_nmi becomes obsolete. Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | | | oprofile, x86: Adding backtrace dump for 32bit process in compat modeJiri Olsa2010-10-011-0/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch implements the oprofile backtrace generation for 32 bit applications running in the 64bit environment (compat mode). With this change it's possible to get backtrace for 32bits applications under the 64bits environment using oprofile's callgraph options. opcontrol --setup -c ... opreport -l -cg ... Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | | | oprofile, x86: Using struct stack_frame for 64bit processes dumpJiri Olsa2010-10-011-12/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Removing unnecessary struct frame_head and replacing it with struct stack_frame. The struct stack_frame is already defined and used in other places in kernel, so there's no reason to define new structure. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | | | Merge branch 'oprofile/urgent' into oprofile/coreRobert Richter2010-10-01653-4240/+7465
| |\ \ \ \ | | |/ / / | |/| | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/arm/oprofile/common.c Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | | | oprofile, arm: initialize perf_event pointers with NULLRobert Richter2010-08-311-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The pointers must be NULL'ed to avoid double-freeing the pointers in rare cases during reinitialization. Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | | | ARM: oprofile: fix and simplify init/exit functionsWill Deacon2010-08-311-22/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that oprofile_arch_exit is only called when the OProfile module is unloaded, it can assume that init completed successfully and not have to worry about double frees or releasing NULL perf events. This patch ensures that oprofile_arch_init fails gracefully on ARM and simplifies the exit code based on the above. Cc: Robert Richter <robert.richter@amd.com> Cc: Matt Fleming <matt@console-pimps.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
| * | | | oprofile: don't call arch exit code from init code on failureWill Deacon2010-08-311-9/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | oprofile_init calls oprofile_arch_init to initialise the architecture-specific backend code. If this backend code returns failure, oprofile_arch_exit is called immediately, making it difficult to allocate and free resources correctly. This patch removes the oprofile_arch_exit call from oprofile_init, meaning that all architectures must ensure that oprofile_arch_init cleans up any mess it's made before returning an error. As far as I can tell, this only affects the code for ARM. Cc: Robert Richter <robert.richter@amd.com> Cc: Matt Fleming <matt@console-pimps.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
* | | | | Merge branch 'tip/perf/recordmcount' of ↵Ingo Molnar2010-10-162-3/+21
|\ \ \ \ \ | |_|_|_|/ |/| | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core
| * | | | ftrace: Use objtree for C version of recordmcountSteven Rostedt2010-10-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The C version of recordmcount is compiled to a binary, which will end up located in the objtree. If the kernel is built with O=path, the srctree will not include the binary recordmcount caller. Cc: Michal Marek <mmarek@suse.cz> Cc: linux-kbuild@vger.kernel.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| * | | | ftrace: Do not process kernel/trace/ftrace.o with C recordmcount programSteven Rostedt2010-10-151-2/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The file kernel/trace/ftrace.c references the mcount() call to convert the mcount() callers to nops. But because it references mcount(), the mcount() address is placed in the relocation table. The C version of recordmcount reads the relocation table of all object files, and it will add all references to mcount to the __mcount_loc table that is used to find the places that call mcount() and change the call to a nop. When recordmcount finds the mcount reference in kernel/trace/ftrace.o, it saves that location even though the code is not a call, but references mcount as data. On boot up, when all calls are converted to nops, the code has a safety check to determine what op code it is actually replacing before it replaces it. If that op code at the address does not match, then a warning is printed and the function tracer is disabled. The reference to mcount in ftrace.c, causes this warning to trigger, since the reference is not a call to mcount(). The ftrace.c file is not compiled with the -pg flag, so no calls to mcount() should be expected. This patch simply makes recordmcount.c skip the kernel/trace/ftrace.c file. This was the same solution used by the perl version of recordmcount. Reported-by: Ingo Molnar <mingo@elte.hu> Cc: John Reiser <jreiser@bitwagon.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
* | | | | Merge branch 'tip/perf/recordmcount-2' of ↵Ingo Molnar2010-10-157-0/+728
|\| | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core
| * | | | ftrace: Rename config option HAVE_C_MCOUNT_RECORD to HAVE_C_RECORDMCOUNTSteven Rostedt2010-10-153-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The config option used by archs to let the build system know that the C version of the recordmcount works for said arch is currently called HAVE_C_MCOUNT_RECORD which enables BUILD_C_RECORDMCOUNT. To be more consistent with the name that all archs may use, it has been renamed to HAVE_C_RECORDMCOUNT. This will be less confusing since we are building a C recordmcount and not a mcount_record. Suggested-by: Ingo Molnar <mingo@elte.hu> Cc: <linux-arch@vger.kernel.org> Cc: Michal Marek <mmarek@suse.cz> Cc: linux-kbuild@vger.kernel.org Cc: John Reiser <jreiser@bitwagon.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| * | | | ftrace: Remove duplicate code for 64 and 32 bit in recordmcount.cSteven Rostedt2010-10-142-544/+370
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The elf reader for recordmcount.c had duplicate functions for both 32 bit and 64 bit elf handling. This was due to the need of using the 32 and 64 bit elf structures. This patch consolidates the two by using macros to define the 32 and 64 bit names in a recordmcount.h file, and then by just defining a RECORD_MCOUNT_64 macro and including recordmcount.h twice we create the funtions for both the 32 bit version as well as the 64 bit version using one code source. Cc: John Reiser <jreiser@bitwagon.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| * | | | ftrace/x86: Add support for C version of recordmcountSteven Rostedt2010-10-145-0/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds the support for the C version of recordmcount and compile times show ~ 12% improvement. After verifying this works, other archs can add: HAVE_C_MCOUNT_RECORD in its Kconfig and it will use the C version of recordmcount instead of the perl version. Cc: <linux-arch@vger.kernel.org> Cc: Michal Marek <mmarek@suse.cz> Cc: linux-kbuild@vger.kernel.org Cc: John Reiser <jreiser@bitwagon.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| * | | | ftrace: Add C version of recordmcount compile time codeJohn Reiser2010-10-141-0/+885
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, the mcount callers are found with a perl script that does an objdump on every file in the kernel. This is a C version of that same code which should increase the performance time of compiling the kernel with dynamic ftrace enabled. Signed-off-by: John Reiser <jreiser@bitwagon.com> [ Updated the code to include .text.unlikely section as well as changing the format to follow Linux coding style. ] Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
* | | | | Merge branch 'perf/core' of ↵Ingo Molnar2010-10-153-2/+9
|\ \ \ \ \ | |/ / / / |/| | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into perf/core
| * | | | x86: Barf when vmalloc and kmemcheck faults happen in NMIFrederic Weisbecker2010-10-142-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In x86, faults exit by executing the iret instruction, which then reenables NMIs if we faulted in NMI context. Then if a fault happens in NMI, another NMI can nest after the fault exits. But we don't yet support nested NMIs because we have only one NMI stack. To prevent from that, check that vmalloc and kmemcheck faults don't happen in this context. Most of the other kernel faults in NMIs can be more easily spotted by finding explicit copy_from,to_user() calls on review. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
| * | | | tracing: Fix function-graph build warning on 32-bitBorislav Petkov2010-10-131-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix kernel/trace/trace_functions_graph.c: In function ‘trace_print_graph_duration’: kernel/trace/trace_functions_graph.c:652: warning: comparison of distinct pointer types lacks a cast when building 36-rc6 on a 32-bit due to the strict type check failing in the min() macro. Signed-off-by: Borislav Petkov <bp@alien8.de> Cc: Chase Douglas <chase.douglas@canonical.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <20100929080823.GA13595@liondog.tnic> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
* | | | | kconfig/x86: Add HAVE_TEXT_POKE_SMP config for stop_machine dependencyMasami Hiramatsu2010-10-141-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since the text_poke_smp() definately depends on actual stop_machine() on smp, add that dependency to Kconfig. Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: 2nddept-manager@sdl.hitachi.co.jp Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> LKML-Reference: <20101014031042.4100.90877.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | x86: Use __stop_machine() in text_poke_smp()Masami Hiramatsu2010-10-141-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use __stop_machine() in text_poke_smp() because the caller must get online_cpus before calling text_poke_smp(), but stop_machine() do it again. We don't need it. Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: 2nddept-manager@sdl.hitachi.co.jp Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> LKML-Reference: <20101014031036.4100.83989.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-09 23:23:34 +0100