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authorNelson Elhage <nelhage@nelhage.com>2011-12-19 08:39:32 -0500
committerArnaldo Carvalho de Melo <acme@redhat.com>2011-12-23 16:53:58 -0200
commit41d0d933494ce10eb77758a1168b08e317c42e8e (patch)
treef907773714846b5b5cf85b4f450bb6fe07b168d4 /tools/perf/Documentation/perf-record.txt
parent18e6093904abfd51671ff5846c2fdaba9ebbf21b (diff)
downloadlinux-linaro-stable-41d0d933494ce10eb77758a1168b08e317c42e8e.tar.gz
perf: builtin-record: Document and check that mmap_pages must be a power of two.
Now that we automatically point users at it, let's provide them some guidance so that they hopefully don't just get mysterious EINVAL's from the kernel. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1324301972-22740-4-git-send-email-nelhage@nelhage.com Signed-off-by: Nelson Elhage <nelhage@nelhage.com> [ committer note: Made it work after 50a682c ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation/perf-record.txt')
-rw-r--r--tools/perf/Documentation/perf-record.txt2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 5a520f825295..2937f7e14bb7 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -89,7 +89,7 @@ OPTIONS
-m::
--mmap-pages=::
- Number of mmap data pages.
+ Number of mmap data pages. Must be a power of two.
-g::
--call-graph::