DAMON debugfs interface assumes the users will write all inputs at once.
However, redirecting a string of multiple lines sometimes end up writing
line by line. Therefore, the example usage of 'init_regions' file, which
writes input as a string of multiple lines can fail. Fix it to use a
single line string instead. Also update the description of the usage to
not assume users will write inputs in multiple lines.
Link: https://lkml.kernel.org/r/20221024174619.15600-3-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Vinicius Petrucci <vpetrucci@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
monitoring target regions by themselves.
In such cases, users can explicitly set the initial monitoring target regions
-as they want, by writing proper values to the ``init_regions`` file. Each line
-of the input should represent one region in below form.::
+as they want, by writing proper values to the ``init_regions`` file. The input
+should be a sequence of three integers separated by white spaces that represent
+one region in below form.::
<target idx> <start address> <end address>
# cd <debugfs>/damon
# cat target_ids
42 4242
- # echo "0 1 100
- 0 100 200
- 1 20 40
+ # echo "0 1 100 \
+ 0 100 200 \
+ 1 20 40 \
1 50 100" > init_regions
Note that this sets the initial monitoring target regions only. In case of