ENUM DAMOS_QUOTA_GOAL_METRIC(9)

💅 enum damos_quota_goal_metric(9) 💅

okay so this is a page straight out of the Kernel API Manual, bestie, and it's all about enum damos_quota_goal_metric — the thing that says which metric DAMOS is gonna chase as its goal ✨

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🌸 NAME 🌸

enum damos_quota_goal_metric — literally just "the metric to be used as the goal." that's it, that's the whole vibe 🎯

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🦋 SYNOPSIS 🦋

enum damos_quota_goal_metric {
    DAMOS_QUOTA_USER_INPUT ,
    DAMOS_QUOTA_SOME_MEM_PSI_US ,
    DAMOS_QUOTA_NODE_MEM_USED_BP ,
    DAMOS_QUOTA_NODE_MEM_FREE_BP ,
    DAMOS_QUOTA_NODE_MEMCG_USED_BP ,
    DAMOS_QUOTA_NODE_MEMCG_FREE_BP ,
    DAMOS_QUOTA_ACTIVE_MEM_BP ,
    DAMOS_QUOTA_INACTIVE_MEM_BP ,
    DAMOS_QUOTA_NODE_ELIGIBLE_MEM_BP ,
    NR_DAMOS_QUOTA_GOAL_METRICS

};

copy it exactly, bestie, no cap 🫶

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✨ Constants ✨

these are the constants, and yes we're going through every single one, don't even try me 💅

• DAMOS_QUOTA_USER_INPUT — the value you typed in yourself. user-input value, periodt 🙋‍♀️
• DAMOS_QUOTA_SOME_MEM_PSI_US — system-level some memory PSI, measured in us ⏱️
• DAMOS_QUOTA_NODE_MEM_USED_BP — the MemUsed ratio of a node, in basis points 📊
• DAMOS_QUOTA_NODE_MEM_FREE_BP — the MemFree ratio of a node 🫧
• DAMOS_QUOTA_NODE_MEMCG_USED_BP — the MemUsed ratio of a node for a cgroup 🧺
• DAMOS_QUOTA_NODE_MEMCG_FREE_BP — the MemFree ratio of a node for a cgroup 🧺🫧
• DAMOS_QUOTA_ACTIVE_MEM_BP — active-to-total LRU memory ratio 🔥
• DAMOS_QUOTA_INACTIVE_MEM_BP — inactive-to-total LRU memory ratio 💤
• DAMOS_QUOTA_NODE_ELIGIBLE_MEM_BP — the scheme-eligible memory ratio of a node, in basis points (0-10000) 👑 — yes, that range is exact, write it down
• NR_DAMOS_QUOTA_GOAL_METRICS — the number of DAMOS quota goal metrics. it's the counter, the little sentinel at the end 🧚

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💜 Description 💜

so the rule here is short and honestly kinda blunt: metrics that are equal to or larger than NR_DAMOS_QUOTA_GOAL_METRICS are unsupported. like, not a thing. don't pass them. the enum stops there and so do you 💀

fr fr, NR_DAMOS_QUOTA_GOAL_METRICS is the ceiling — anything at or past it gets a vibe check it will not pass.

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🌈 SEE ALSO 🌈

the kernel file lives at ./include/linux/damon.h — go read it, iykyk 📖

and here's the whole friend group, literally all of them:

• struct damon_addr_range(9)
• struct damon_size_range(9)
• struct damon_region(9)
• struct damon_target(9)
• enum damos_action(9)
• struct damos_quota_goal(9)
• enum damos_quota_goal_tuner(9)
• struct damos_quota(9)
• enum damos_wmark_metric(9)
• struct damos_watermarks(9)
• struct damos_stat(9)
• enum damos_filter_type(9)
• struct damos_filter(9)
• struct damos_walk_control(9)
• struct damos_access_pattern(9)
• struct damos_migrate_dests(9)
• struct damos(9)
• enum damon_ops_id(9)
• struct damon_operations(9)
• struct damon_intervals_goal(9)
• enum damon_filter_type(9)
• struct damon_filter(9)
• struct damon_probe(9)
• struct damon_attrs(9)
• struct damon_ctx(9)

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and that's the whole page, bestie 🎀 it ships from ./include/linux and it's dated October 2026 — catch you on the next enum damos_q..._goal_metric(9) reread, mwah 🫶💖