gen_replace_estimator(9)

💫 gen_replace_estimator — from the Kernel API Manual (section 9, bestie 🎀)

okay so picture this: you've got a rate estimator and its config is not it anymore. so you call gen_replace_estimator, and it's literally the "out with the old, in with the new" of estimator configs. and yes, this is gen_replace_estimator(9) from the Kernel API Manual, in case you were wondering which manual we're living in 💅

✨ NAME ✨

gen_replace_estimator — replace rate estimator configuration, that's the whole job, and she does it flawlessly 👑

🦋 SYNOPSIS 🦋

int gen_replace_estimator (struct gnet_stats_basic_sync *bstats , struct
gnet_stats_basic_sync __percpu *cpu_bstats , struct net_rate_estimator
__rcu **rate_est , spinlock_t *lock , bool running , struct nlattr *opt
);

copy it exactly like that, no cap, the types are doing the heavy lifting 🫶

🌸 ARGUMENTS 🌸

• bstats — basic statistics. the vibes baseline, so to speak.
• cpu_bstats — the bstats per cpu. one for every cpu, so nobody has to share 🧚
• rate_est — rate estimator statistics ✨
• lock — the lock for statistics and the control path. two jobs, one lock, main character energy lowkey.
• running — true if bstats represents a running qdisc, which means bstats' internal values might literally change during basic reads 😭 only used if cpu_bstats is NULL. remember that part, it's important.
• opt — rate estimator configuration TLV 🎀

💜 DESCRIPTION 💜

She replaces the configuration of a rate estimator. the way she does it? by calling gen_kill_estimator and gen_new_estimator — kill the old, birth the new, iconic behavior honestly.

Returns 0 on success or a negative error code. slay either way, but like, preferably 0 🙈

⭐ SEE ALSO ⭐

• Kernel file ./net/core/gen_estimator.c
• gen_new_estimator(9)
• gen_kill_estimator(9)
• gen_estimator_active(9)

bestie fr fr: go read those three, they're the whole friend group and this page is just the one holding the group chat together 🫶

that's the whole page!! written in ./net/core, dated October 2026, and belonging to gen_replace_estimator(9) — go forth and replace some estimator configs, you've got this 💖💅🔥