The patch titled Subject: mm/damon/sysfs-schemes: commit damos quota goals user input to DAMOS has been added to the -mm mm-unstable branch. Its filename is mm-damon-sysfs-schemes-commit-damos-quota-goals-user-input-to-damos.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-sysfs-schemes-commit-damos-quota-goals-user-input-to-damos.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: SeongJae Park <sj@xxxxxxxxxx> Subject: mm/damon/sysfs-schemes: commit damos quota goals user input to DAMOS Date: Thu, 30 Nov 2023 02:36:46 +0000 Make DAMON sysfs interface to read the user inputs for DAMOS quota goals and pass those to DAMOS, so that the users can use the quota auto-tuning feature. It uses the DAMON sysfs interface's user input commit mechanism, which applies all user inputs for initial starting of DAMON and online input updates, which can be done by writing 'on' and 'commit' to the kdamond's 'state' file, respectively. In other words, the user should periodically write appropriate value to 'current_value' files and 'commit' command to the 'state' file. 'target_value' files could also be similarly updated at any time. Note that the interface is supporting multiple goals while the core logic supports only one goal. DAMON sysfs interface passes only best feedback among the given inputs, to avoid making DAMOS too aggressive. Link: https://lkml.kernel.org/r/20231130023652.50284-4-sj@xxxxxxxxxx Signed-off-by: SeongJae Park <sj@xxxxxxxxxx> Cc: Brendan Higgins <brendanhiggins@xxxxxxxxxx> Cc: David Gow <davidgow@xxxxxxxxxx> Cc: Jonathan Corbet <corbet@xxxxxxx> Cc: Shuah Khan <shuah@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/damon/sysfs-schemes.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) --- a/mm/damon/sysfs-schemes.c~mm-damon-sysfs-schemes-commit-damos-quota-goals-user-input-to-damos +++ a/mm/damon/sysfs-schemes.c @@ -1868,6 +1868,34 @@ static int damon_sysfs_set_scheme_filter return 0; } +static unsigned long damos_sysfs_get_quota_score(void *arg) +{ + return (unsigned long)arg; +} + +static void damos_sysfs_set_quota_score( + struct damos_sysfs_quota_goals *sysfs_goals, + struct damos_quota *quota) +{ + struct damos_sysfs_quota_goal *sysfs_goal; + int i; + + quota->get_score = NULL; + quota->get_score_arg = (void *)0; + for (i = 0; i < sysfs_goals->nr; i++) { + sysfs_goal = sysfs_goals->goals_arr[i]; + if (!sysfs_goal->target_value) + continue; + + /* Higher score makes scheme less aggressive */ + quota->get_score_arg = (void *)max( + (unsigned long)quota->get_score_arg, + sysfs_goal->current_value * 10000 / + sysfs_goal->target_value); + quota->get_score = damos_sysfs_get_quota_score; + } +} + static struct damos *damon_sysfs_mk_scheme( struct damon_sysfs_scheme *sysfs_scheme) { @@ -1905,6 +1933,8 @@ static struct damos *damon_sysfs_mk_sche .low = sysfs_wmarks->low, }; + damos_sysfs_set_quota_score(sysfs_quotas->goals, "a); + scheme = damon_new_scheme(&pattern, sysfs_scheme->action, sysfs_scheme->apply_interval_us, "a, &wmarks); if (!scheme) @@ -1945,6 +1975,8 @@ static void damon_sysfs_update_scheme(st scheme->quota.weight_nr_accesses = sysfs_weights->nr_accesses; scheme->quota.weight_age = sysfs_weights->age; + damos_sysfs_set_quota_score(sysfs_quotas->goals, &scheme->quota); + scheme->wmarks.metric = sysfs_wmarks->metric; scheme->wmarks.interval = sysfs_wmarks->interval_us; scheme->wmarks.high = sysfs_wmarks->high; _ Patches currently in -mm which might be from sj@xxxxxxxxxx are mm-damon-core-copy-nr_accesses-when-splitting-region.patch mm-damon-sysfs-schemes-add-timeout-for-update_schemes_tried_regions.patch mm-damon-core-test-test-damon_split_region_ats-access-rate-copying.patch mm-damon-core-implement-goal-oriented-feedback-driven-quota-auto-tuning.patch mm-damon-sysfs-schemes-implement-files-for-scheme-quota-goals-setup.patch mm-damon-sysfs-schemes-commit-damos-quota-goals-user-input-to-damos.patch mm-damon-sysfs-schemes-implement-a-command-for-scheme-quota-goals-only-commit.patch mm-damon-core-test-add-a-unit-test-for-the-feedback-loop-algorithm.patch selftests-damon-test-quota-goals-directory.patch docs-mm-damon-design-document-damos-quota-auto-tuning.patch docs-abi-damon-document-damos-quota-goals.patch docs-admin-guide-mm-damon-usage-document-for-quota-goals.patch