diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/damon.h | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/include/linux/damon.h b/include/linux/damon.h index 07cee590ff09..1f425d830bb9 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -470,6 +470,7 @@ struct damos_migrate_dests { * @apply_interval_us: The time between applying the @action. * @quota: Control the aggressiveness of this scheme. * @wmarks: Watermarks for automated (in)activation of this scheme. + * @migrate_dests: Destination nodes if @action is "migrate_{hot,cold}". * @target_nid: Destination node if @action is "migrate_{hot,cold}". * @filters: Additional set of &struct damos_filter for &action. * @ops_filters: ops layer handling &struct damos_filter objects list. @@ -488,9 +489,12 @@ struct damos_migrate_dests { * monitoring context are inactive, DAMON stops monitoring either, and just * repeatedly checks the watermarks. * + * @migrate_dests specifies multiple migration target nodes with different + * weights for migrate_hot or migrate_cold actions. @target_nid is ignored if + * this is set. + * * @target_nid is used to set the migration target node for migrate_hot or - * migrate_cold actions, which means it's only meaningful when @action is either - * "migrate_hot" or "migrate_cold". + * migrate_cold actions, and @migrate_dests is unset. * * Before applying the &action to a memory region, &struct damon_operations * implementation could check pages of the region and skip &action to respect @@ -533,7 +537,10 @@ struct damos { struct damos_quota quota; struct damos_watermarks wmarks; union { - int target_nid; + struct { + int target_nid; + struct damos_migrate_dests migrate_dests; + }; }; struct list_head filters; struct list_head ops_filters; |