kevin/linux
1
Fork 0
Code

_damon_sysfs: implement commit() for online parameters update

Browse Source 
Users can update DAMON parameters while it is running, using 'commit'
DAMON sysfs interface command.  For testing the feature in future tests,
implement a function for doing that on the test-purpose DAMON sysfs
interface wrapper Python module.

Link: https://lkml.kernel.org/r/20240625180538.73134-8-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2024-06-25 11:05:37 -07:00 committed by Andrew Morton
parent 781497347d
commit 5ac9adecf0
1 changed files with 19 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
tools/testing/selftests/damon/_damon_sysfs.py
View File

@ -481,6 +481,25 @@ class Kdamond:
goal.effective_bytes = int(content)
return None
def commit(self):
nr_contexts_file = os.path.join(self.sysfs_dir(),
'contexts', 'nr_contexts')
content, err = read_file(nr_contexts_file)
if err is not None:
return err
if int(content) != len(self.contexts):
err = write_file(nr_contexts_file, '%d' % len(self.contexts))
if err is not None:
return err
for context in self.contexts:
err = context.stage()
if err is not None:
return err
err = write_file(os.path.join(self.sysfs_dir(), 'state'), 'commit')
return err
def commit_schemes_quota_goals(self):
for context in self.contexts:
for scheme in context.schemes: