Masami Hiramatsu
b61ffc949c
[ Upstream commitaf04dd2f8e] Fix to show ranges of variables (--range and --vars option) in functions which DIE has only ranges but no entry_pc attribute. Without this fix: # perf probe --range -V clear_tasks_mm_cpumask Available variables at clear_tasks_mm_cpumask @<clear_tasks_mm_cpumask+0> (No matched variables) With this fix: # perf probe --range -V clear_tasks_mm_cpumask Available variables at clear_tasks_mm_cpumask @<clear_tasks_mm_cpumask+0> [VAL] int cpu @<clear_tasks_mm_cpumask+[0-35,317-317,2052-2059]> Committer testing: Before: [root@quaco ~]# perf probe --range -V clear_tasks_mm_cpumask Available variables at clear_tasks_mm_cpumask @<clear_tasks_mm_cpumask+0> (No matched variables) [root@quaco ~]# After: [root@quaco ~]# perf probe --range -V clear_tasks_mm_cpumask Available variables at clear_tasks_mm_cpumask @<clear_tasks_mm_cpumask+0> [VAL] int cpu @<clear_tasks_mm_cpumask+[0-23,23-105,105-106,106-106,1843-1850,1850-1862]> [root@quaco ~]# Using it: [root@quaco ~]# perf probe clear_tasks_mm_cpumask cpu Added new event: probe:clear_tasks_mm_cpumask (on clear_tasks_mm_cpumask with cpu) You can now use it in all perf tools, such as: perf record -e probe:clear_tasks_mm_cpumask -aR sleep 1 [root@quaco ~]# perf probe -l probe:clear_tasks_mm_cpumask (on clear_tasks_mm_cpumask@kernel/cpu.c with cpu) [root@quaco ~]# [root@quaco ~]# perf trace -e probe:*cpumask ^C[root@quaco ~]# Fixes:349e8d2611("perf probe: Add --range option to show a variable's location range") Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lore.kernel.org/lkml/157199323018.8075.8179744380479673672.stgit@devnote2 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.