diff options
| author | SeongJae Park <sj@kernel.org> | 2025-03-06 09:59:00 -0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-03-17 22:06:55 -0700 |
| commit | 8b40db0edf3c4e02369509ace9c29f558f7b5cba (patch) | |
| tree | d6ac6940c8a88b979202f9d5c1c62362583d5a3f /mm | |
| parent | 3301f1861d34f53911a30a8f5f41b9141bd8ed39 (diff) | |
mm/damon/sysfs: remove damon_sysfs_cmd_request code from damon_sysfs_handle_cmd()
damon_sysfs_handle_cmd() handles user requests that it can directly handle
on its own. For requests that need to be handled from damon_callback
hooks, it uses DAMON sysfs interface's own synchronous damon_callback
hooks management mechanism, namely damon_sysfs_cmd_request. Now all user
requests are handled without damon_callback hooks, so
damon_sysfs_cmd_request client code in damon_sysfs_andle_cmd() does
nothing in real. Remove the unnecessary code.
Link: https://lkml.kernel.org/r/20250306175908.66300-6-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/damon/sysfs.c | 32 |
1 files changed, 0 insertions, 32 deletions
diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index c55a2cee4b74..166161f12c26 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -1715,8 +1715,6 @@ static int damon_sysfs_update_schemes_tried_regions( static int damon_sysfs_handle_cmd(enum damon_sysfs_cmd cmd, struct damon_sysfs_kdamond *kdamond) { - bool need_wait = true; - switch (cmd) { case DAMON_SYSFS_CMD_ON: return damon_sysfs_turn_damon_on(kdamond); @@ -1747,38 +1745,8 @@ static int damon_sysfs_handle_cmd(enum damon_sysfs_cmd cmd, return damon_sysfs_damon_call( damon_sysfs_upd_tuned_intervals, kdamond); default: - break; - } - - /* Pass the command to DAMON callback for safe DAMON context access */ - if (damon_sysfs_cmd_request.kdamond) - return -EBUSY; - if (!damon_sysfs_kdamond_running(kdamond)) return -EINVAL; - damon_sysfs_cmd_request.cmd = cmd; - damon_sysfs_cmd_request.kdamond = kdamond; - - /* - * wait until damon_sysfs_cmd_request_callback() handles the request - * from kdamond context - */ - mutex_unlock(&damon_sysfs_lock); - while (need_wait) { - schedule_timeout_idle(msecs_to_jiffies(100)); - if (!mutex_trylock(&damon_sysfs_lock)) - continue; - if (!damon_sysfs_cmd_request.kdamond) { - /* damon_sysfs_cmd_request_callback() handled */ - need_wait = false; - } else if (!damon_sysfs_kdamond_running(kdamond)) { - /* kdamond has already finished */ - need_wait = false; - damon_sysfs_cmd_request.kdamond = NULL; - } - mutex_unlock(&damon_sysfs_lock); } - mutex_lock(&damon_sysfs_lock); - return 0; } static ssize_t state_store(struct kobject *kobj, struct kobj_attribute *attr, |