linux/tools, branch v2.6.34

perf record: Add a fallback to the reference relocation symbol

2010-05-13T05:55:29Z

Usually "_text" is enough, but I received reports that its not always available, so fallback to "_stext" for the symbol we use to check if we need to apply any relocation to all the symbols in the kernel symtab, for when, for instance, kexec is being used. Reported-by: Darren Hart Reported-by: Steven Rostedt Cc: Frédéric Weisbecker Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Paul Mackerras Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Ingo Molnar

perf: Fix static strings treated like dynamic ones

2010-05-11T07:14:24Z

The raw_field_ptr() helper, used to retrieve the address of a field inside a trace event, treats every strings as if they were dynamic ie: having a secondary level of indirection to retrieve their contents. FIELD_IS_STRING doesn't mean FIELD_IS_DYNAMIC, we only need to compute the secondary dereference for the latter case. This fixes perf sched segfaults, bad cmdline report and may be some other bugs. Reported-by: Jason Baron Reported-by: Arnaldo Carvalho de Melo Signed-off-by: Frederic Weisbecker Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Paul Mackerras Cc: Tom Zanussi

perf kmem: Fix breakage introduced by 5a0e3ad slab.h script

2010-04-06T15:48:06Z

Commit 5a0e3ad ("include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h") added a '#include ' to tools/perf/builtin-kmem.h because: that tool has lines like this: if (!strcmp(event->name, "kmalloc") || !strcmp(event->name, "kmem_cache_alloc")) { process_alloc_event(data, event, cpu, timestamp, thread, 0); return; } So, using the script regex: >>> import re >>> s = re.compile(r'^(|.*[^a-zA-Z0-9_])_*(slab_is_available|kmem_cache_|k[mzc]alloc|krealloc|kz?free|ksize|__getname|putname)') >>> l = ' !strcmp(event->name, "kmem_cache_alloc")) {' >>> s.search(l) <_sre.SRE_Match object at 0xb77b1ad0> >>> Remove that file that is not available in the tools/perf include path and thus builtin-kmem.c couldn't be compiled. Reported-by: Peter Zijlstra Cc: Christoph Lameter Cc: Frédéric Weisbecker Cc: Lee Schermerhorn Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Paul Mackerras Cc: Tejun Heo Cc: Linus Torvalds LKML-Reference: <1270561053-14308-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar

Merge branch 'master' into export-slabh

2010-04-05T02:37:28Z

perf, probe-finder: Build fix on Debian

2010-04-02T20:46:26Z

Building chokes with: In file included from /usr/include/gelf.h:53, from /usr/include/elfutils/libdw.h:53, from util/probe-finder.h:61, from util/probe-finder.c:39: /usr/include/libelf.h:98: error: expected specifier-qualifier-list before 'off64_t' [...] Signed-off-by: Borislav Petkov Acked-by: Masami Hiramatsu LKML-Reference: <20100329164755.GA16034@aftab> Signed-off-by: Ingo Molnar

perf/scripts: Tuple was set from long in both branches in python_process_event()

2010-04-02T19:32:16Z

This is a fix to the signed/unsigned field handling in the Python scripting engine, based on a patch from Roel Kluin. Basically, Python wants to use a PyInt (which is internally a long) if it can i.e. if the value will fit into that type. If not, it stores it into a PyLong, which isn't actually a long, but an arbitrary-precision integer variable. The code below is similar to to what Python does internally, and it seems to work as expected on the x86 and x86_64 sytems I tested it on. Signed-off-by: Tom Zanussi Cc: Arnaldo Carvalho de Melo Cc: Roel Kluin Cc: Frederic Weisbecker Cc: rostedt@goodmis.org LKML-Reference: <1270184305.6422.10.camel@tropicana> Signed-off-by: Ingo Molnar

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30T13:02:32Z

percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo Guess-its-ok-by: Christoph Lameter Cc: Ingo Molnar Cc: Lee Schermerhorn

Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-03-26T22:09:33Z

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: powerpc/perf_events: Fix call-graph recording, add perf_arch_fetch_caller_regs perf top: Add missing initialization to zero perf probe: Use original address instead of CU-based address perf probe: Fix offset to allow signed value perf top: Improve the autosizing of column lenghts perf probe: Fix need_dwarf flag if lazy matching is used perf probe: Fix probe_point buffer overrun

Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-03-18T23:52:46Z

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (35 commits) perf: Fix unexported generic perf_arch_fetch_caller_regs perf record: Don't try to find buildids in a zero sized file perf: export perf_trace_regs and perf_arch_fetch_caller_regs perf, x86: Fix hw_perf_enable() event assignment perf, ppc: Fix compile error due to new cpu notifiers perf: Make the install relative to DESTDIR if specified kprobes: Calculate the index correctly when freeing the out-of-line execution slot perf tools: Fix sparse CPU numbering related bugs perf_event: Fix oops triggered by cpu offline/online perf: Drop the obsolete profile naming for trace events perf: Take a hot regs snapshot for trace events perf: Introduce new perf_fetch_caller_regs() for hot regs snapshot perf/x86-64: Use frame pointer to walk on irq and process stacks lockdep: Move lock events under lockdep recursion protection perf report: Print the map table just after samples for which no map was found perf report: Add multiple event support perf session: Change perf_session post processing functions to take histogram tree perf session: Add storage for seperating event types in report perf session: Change add_hist_entry to take the tree root instead of session perf record: Add ID and to recorded event data when recording multiple events ...

perf top: Add missing initialization to zero

2010-03-16T21:51:00Z

The dso_short_width has to start as zero, as we're calculating the maximum short DSO name length, somehow I missed this one. Reported-by: Frédéric Weisbecker Signed-off-by: Arnaldo Carvalho de Melo Cc: Frédéric Weisbecker Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Paul Mackerras LKML-Reference: <1268774926-27488-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar