diff options
| -rw-r--r-- | mm/damon/reclaim.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/mm/damon/reclaim.c b/mm/damon/reclaim.c index fb7c982a0018..590f9d6c55ef 100644 --- a/mm/damon/reclaim.c +++ b/mm/damon/reclaim.c @@ -129,6 +129,13 @@ static unsigned long monitor_region_end __read_mostly; module_param(monitor_region_end, ulong, 0600); /* + * Scale factor for DAMON_RECLAIM to ops address conversion. + * + * This parameter must not be set to 0. + */ +static unsigned long addr_unit __read_mostly = 1; + +/* * Skip anonymous pages reclamation. * * If this parameter is set as ``Y``, DAMON_RECLAIM does not reclaim anonymous @@ -194,6 +201,15 @@ static int damon_reclaim_apply_parameters(void) if (err) return err; + /* + * If monitor_region_start/end are unset, always silently + * reset addr_unit to 1. + */ + if (!monitor_region_start && !monitor_region_end) + addr_unit = 1; + param_ctx->addr_unit = addr_unit; + param_ctx->min_sz_region = max(DAMON_MIN_REGION / addr_unit, 1); + if (!damon_reclaim_mon_attrs.aggr_interval) { err = -EINVAL; goto out; @@ -294,6 +310,30 @@ static int damon_reclaim_turn(bool on) return damon_call(ctx, &call_control); } +static int damon_reclaim_addr_unit_store(const char *val, + const struct kernel_param *kp) +{ + unsigned long input_addr_unit; + int err = kstrtoul(val, 0, &input_addr_unit); + + if (err) + return err; + if (!input_addr_unit) + return -EINVAL; + + addr_unit = input_addr_unit; + return 0; +} + +static const struct kernel_param_ops addr_unit_param_ops = { + .set = damon_reclaim_addr_unit_store, + .get = param_get_ulong, +}; + +module_param_cb(addr_unit, &addr_unit_param_ops, &addr_unit, 0600); +MODULE_PARM_DESC(addr_unit, + "Scale factor for DAMON_RECLAIM to ops address conversion (default: 1)"); + static int damon_reclaim_enabled_store(const char *val, const struct kernel_param *kp) { |