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| author | Nelson Elhage | 2011-12-19 14:39:32 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo | 2011-12-23 19:53:58 +0100 |
| commit | 41d0d933494ce10eb77758a1168b08e317c42e8e (patch) | |
| tree | f907773714846b5b5cf85b4f450bb6fe07b168d4 /tools/perf/Documentation/perf-record.txt | |
| parent | perf: builtin-record: Provide advice if mmap'ing fails with EPERM. (diff) | |
| download | kernel-qcow2-linux-41d0d933494ce10eb77758a1168b08e317c42e8e.tar.gz kernel-qcow2-linux-41d0d933494ce10eb77758a1168b08e317c42e8e.tar.xz kernel-qcow2-linux-41d0d933494ce10eb77758a1168b08e317c42e8e.zip | |
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.txt | 2 |
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:: |