diff options
Diffstat (limited to 'mm/damon/reclaim.c')
| -rw-r--r-- | mm/damon/reclaim.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/mm/damon/reclaim.c b/mm/damon/reclaim.c index 9df6b8819998..9bd341d62b4c 100644 --- a/mm/damon/reclaim.c +++ b/mm/damon/reclaim.c @@ -63,6 +63,21 @@ static struct damos_quota damon_reclaim_quota = { DEFINE_DAMON_MODULES_DAMOS_QUOTAS(damon_reclaim_quota); /* + * Desired level of memory pressure-stall time in microseconds. + * + * While keeping the caps that set by other quotas, DAMON_RECLAIM automatically + * increases and decreases the effective level of the quota aiming this level of + * memory pressure is incurred. System-wide ``some`` memory PSI in microseconds + * per quota reset interval (``quota_reset_interval_ms``) is collected and + * compared to this value to see if the aim is satisfied. Value zero means + * disabling this auto-tuning feature. + * + * Disabled by default. + */ +static unsigned long quota_mem_pressure_us __read_mostly; +module_param(quota_mem_pressure_us, ulong, 0600); + +/* * User-specifiable feedback for auto-tuning of the effective quota. * * While keeping the caps that set by other quotas, DAMON_RECLAIM automatically @@ -198,6 +213,16 @@ static int damon_reclaim_apply_parameters(void) &old_scheme->quota); } + if (quota_mem_pressure_us) { + goal = damos_new_quota_goal(DAMOS_QUOTA_SOME_MEM_PSI_US, + quota_mem_pressure_us); + if (!goal) { + damon_destroy_scheme(scheme); + return -ENOMEM; + } + damos_add_quota_goal(&scheme->quota, goal); + } + if (quota_autotune_feedback) { goal = damos_new_quota_goal(DAMOS_QUOTA_USER_INPUT, 10000); if (!goal) { |