Concurrency(9)

🦋 Concurrency 💅

okay so first things first, bestie: this page lives in the Kernel API Manual, and it's literally titled Concurrency (like, Concurrency(9) if we're being formal 🎀). it's short, it's sweet, and it's giving "read me before you touch anything" energy. let's get into it ✨

🌸 the actual vibe (the rules, fr fr)

so iwlwifi can call iwlmei at any time. like, any time any time. no appointment, no warning, just showing up unannounced 🫶

and iwlmei is the chill one here — it will take care to synchronize the calls from iwlwifi with its own internal flows. it's got the scheduling handled, basically main character energy on the synchronization front 👑

but here's the part where you gotta pay attention, no cap:

• iwlwifi must not call iwlmei in flows that cannot sleep 😴
• moreover, iwlwifi must not call iwlmei in flows that originated from iwlmei 🙈

bestie. i'm serious. both of those are hard "do not"s. don't be the one who does it. the "cannot sleep" one and the "originated from iwlmei" one — those are the two things you simply do not do 💀

✨ SEE ALSO ✨

the kernel file in question is literally:

./drivers/net/wireless/intel/iwlwifi/mei/iwl-mei.h

and here's the whole friend group of related pages — go say hi to all of them 🦋:

• Introduction(9)
• Life cycle(9)
• Memory layout(9)
• Probe and remove from mei bus driver(9)
• Driver load when CSME owns the device(9)
• CSME behavior regarding the ownership requests(9)
• Driver load when CSME is associated and a session is active(9)
• Datapath(9)
• enum iwl_mei_nvm_caps(9)
• struct iwl_mei_nvm(9)
• enum iwl_mei_pairwise_cipher(9)
• enum iwl_mei_akm_auth(9)
• struct iwl_mei_conn_info(9)
• struct iwl_mei_colloc_info(9)
• enum iwl_mei_sap_version(9)
• iwl_mei_is_connected(9)
• iwl_mei_get_nvm(9)
• iwl_mei_get_ownership(9)
• iwl_mei_set_rfkill_state(9)
• iwl_mei_set_nic_info(9)
• iwl_mei_set_country_code(9)
• iwl_mei_set_power_limit(9)
• iwl_mei_register(9)
• iwl_mei_start_unregister(9)
• iwl_mei_unregister_complete(9)
• iwl_mei_set_netdev(9)
• iwl_mei_tx_copy_to_csme(9)
• iwl_mei_host_associated(9)
• iwl_mei_host_disassociated(9)
• iwl_mei_device_state(9)
• iwl_mei_pldr_req(9)
• iwl_mei_alive_notif(9)

💖 and that's the whole page, bestie, you ate that. mwah 🫶

— cute lil sign-off: this lil masterpiece comes from ./drivers/net/wireless/intel/i..., stamped October 2026, and it's the Concurrency(9) page, okurrr ✨🦋🎀