perf tools: Add possibility to specify mmap size

[karo-tx-linux.git] / tools / perf / Documentation / perf-record.txt

diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index f732eaa6a500b655a9b0503378bc5de99bc21294..f10ab63576d7550dbffade473f45332be969657c 100644 (file)
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -87,7 +87,9 @@ OPTIONS
 
 -m::
 --mmap-pages=::
-       Number of mmap data pages. Must be a power of two.
+       Number of mmap data pages (must be a power of two) or size
+       specification with appended unit character - B/K/M/G. The
+       size is rounded up to have nearest pages power of two value.
 
 -g::
 --call-graph::