sas_ncq_prio_enable_show(9)

💅 sas_ncq_prio_enable_show(9) — from the Kernel API Manual, bestie ✨

okay so picture this: you're deep in the mpt3sas driver, poking at sysfs, and you find this little function. it's giving "small but mighty" and honestly? iconic. it's from the Kernel API Manual, section 9, and we're gonna walk through it together, no gatekeeping. 🫶

✨ NAME ✨

ssize_t sas_ncq_prio_enable_show — sending prioritized io commands to your device, literally.

🌸 SYNOPSIS 🌸

ssize_t sas_ncq_prio_enable_show (struct device *dev , struct
       device_attribute *attr , char *buf );

🎀 ARGUMENTS 🎀

• dev — pointer to the embedded device. that's your main character right there 👑
• attr — ? ... yeah bestie, the docs literally say ?. we don't know. nobody knows. it's a mystery, it's a vibe, we move on 💀
• buf — the buffer that gets returned. this is where the output lives 🦋

💖 DESCRIPTION 💖

so it's a sysfs 'read/write' sdev attribute. cute! but here's the catch, and I need you to hear me on this one: it only works with SATA. not SAS, not whatever else you were about to try. SATA. periodt. 🔥

no cap, if you're on a non-SATA device, this attribute is not gonna do the thing for you. read the room (and the disk type) first 🙈

🌈 SEE ALSO 🌈

the friend group 🫶 — also from the kernel file ./drivers/scsi/mpt3sas/mpt3sas_ctl.c, plus one very special enum:

• enum block_state(9)
• _ctl_display_some_debug(9)
• mpt3sas_ctl_done(9)
• _ctl_check_event_type(9)
• mpt3sas_ctl_add_to_event_log(9)
• mpt3sas_ctl_event_callback(9)
• _ctl_verify_adapter(9)
• mpt3sas_ctl_pre_reset_handler(9)
• mpt3sas_ctl_clear_outstanding_ioctls(9)
• mpt3sas_ctl_reset_done_handler(9)
• _ctl_fasync(9)
• _ctl_poll(9)
• _ctl_set_task_mid(9)
• _ctl_send_mctp_passthru_req(9)
• _ctl_do_mpt_command(9)
• _ctl_getiocinfo(9)
• _ctl_eventquery(9)
• _ctl_eventenable(9)
• _ctl_eventreport(9)
• _ctl_do_reset(9)
• _ctl_btdh_search_sas_device(9)
• _ctl_btdh_search_pcie_device(9)
• _ctl_btdh_search_raid_device(9)
• _ctl_btdh_mapping(9)
• _ctl_diag_capability(9)
• _ctl_diag_get_bufftype(9)
• _ctl_diag_register_2(9)
• mpt3sas_enable_diag_buffer(9)
• _ctl_diag_register(9)
• _ctl_diag_unregister(9)
• _ctl_diag_query(9)
• mpt3sas_send_diag_release(9)
• _ctl_diag_release(9)
• _ctl_diag_read_buffer(9)
• _ctl_addnl_diag_query(9)
• _ctl_enable_diag_sbr_reload(9)
• _ctl_compat_mpt_command(9)
• _ctl_ioctl_main(9)
• _ctl_get_mpt_mctp_passthru_adapter(9)
• mpt3sas_get_device_count(9)
• _ctl_ioctl(9)
• _ctl_mpt2_ioctl(9)
• _ctl_ioctl_compat(9)
• _ctl_mpt2_ioctl_compat(9)
• version_fw_show(9)
• version_bios_show(9)
• version_mpi_show(9)
• version_product_show(9)
• version_nvdata_persistent_show(9)
• version_nvdata_default_show(9)
• board_name_show(9)
• board_assembly_show(9)
• board_tracer_show(9)
• io_delay_show(9)
• device_delay_show(9)
• fw_queue_depth_show(9)
• host_sas_address_show(9)
• logging_level_show(9)
• fwfault_debug_show(9)
• ioc_reset_count_show(9)
• reply_queue_count_show(9)
• BRM_status_show(9)
• host_trace_buffer_size_show(9)
• host_trace_buffer_show(9)
• host_trace_buffer_enable_show(9)
• diag_trigger_master_show(9)
• diag_trigger_master_store(9)
• diag_trigger_event_show(9)
• diag_trigger_event_store(9)
• diag_trigger_scsi_show(9)
• diag_trigger_scsi_store(9)
• diag_trigger_mpi_show(9)
• diag_trigger_mpi_store(9)
• drv_support_bitmap_show(9)
• enable_sdev_max_qd_show(9)
• enable_sdev_max_qd_store(9)
• sas_address_show(9)
• sas_device_handle_show(9)
• sas_ncq_prio_supported_show(9)
• mpt3sas_ctl_init(9)
• mpt3sas_ctl_release(9)
• mpt3sas_ctl_exit(9)

and that's the whole page, bestie, you ate that 💅

sign-off time 🧚 this lil masterpiece lives in ./drivers/scsi/mpt3sas, dated October 2026, and it's part of the Kernel API Manual. go forth and prioritize your io, but only on SATA. mwah 🍓💜