vb2_thread_start(9)

NAME

Okay so bestie, welcome to vb2_thread_start(9) from the Kernel API Manual — this one is literally “start a thread for the given queue.” Periodt. 💅

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SYNOPSIS

The whole signature, no cap:

int vb2_thread_start (struct vb2_queue *q , vb2_thread_fnc fnc , void
       *priv , const char *thread_name );

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ARGUMENTS

• q — pointer to struct vb2_queue with the videobuf2 queue. That’s the queue bestie. 🫶
• fnc — the vb2_thread_fnc callback function. It’s giving “you provide the function.”
• priv — the priv pointer that gets passed to the callback function. Very “here’s your stuff back.”
• thread_name — the name of the thread. This will be prefixed with "vb2-". So yes, the thread is getting a little vb2- bow on top. 🎀

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DESCRIPTION

This starts a thread that will queue and dequeue until an error occurs or vb2_thread_stop is called. Like, it’s a whole loop vibe — queue, dequeue, repeat — until something goes wrong or you stop it. 😭

ATTENTION: This function should not be used for anything else but the videobuf2-dvb support. If you think you have another good use-case for this, then please contact the linux-media mailing list first.

No cap, that warning is serious: this is not the “use it wherever, bestie” function. If you think you’ve got another good use-case, talk to the linux-media mailing list first. 💀

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SEE ALSO

Kernel file ./include/media/videobuf2-core.h, plus the whole iconic lineup:

• enum vb2_memory(9)
• struct vb2_mem_ops(9)
• struct vb2_plane(9)
• enum vb2_io_modes(9)
• enum vb2_buffer_state(9)
• struct vb2_buffer(9)
• struct vb2_ops(9)
• struct vb2_buf_ops(9)
• struct vb2_queue(9)
• vb2_queue_allows_cache_hints(9)
• vb2_plane_vaddr(9)
• vb2_plane_cookie(9)
• vb2_buffer_done(9)
• vb2_discard_done(9)
• vb2_wait_for_all_buffers(9)
• vb2_core_querybuf(9)
• vb2_core_reqbufs(9)
• vb2_core_create_bufs(9)
• vb2_core_prepare_buf(9)
• vb2_core_remove_bufs(9)
• vb2_core_qbuf(9)
• vb2_core_dqbuf(9)
• vb2_core_streamon(9)
• vb2_core_streamoff(9)
• vb2_core_expbuf(9)
• vb2_core_queue_init(9)
• vb2_core_queue_release(9)
• vb2_queue_error(9)
• vb2_mmap(9)
• vb2_get_unmapped_area(9)
• vb2_core_poll(9)
• vb2_read(9)
• vb2_write(9)
• vb2_thread_fnc(9)
• vb2_thread_stop(9)
• vb2_is_streaming(9)
• vb2_fileio_is_active(9)
• vb2_get_num_buffers(9)
• vb2_is_busy(9)
• vb2_get_drv_priv(9)
• vb2_set_plane_payload(9)
• vb2_get_plane_payload(9)
• vb2_plane_size(9)
• vb2_start_streaming_called(9)
• vb2_clear_last_buffer_dequeued(9)
• vb2_get_buffer(9)
• vb2_buffer_in_use(9)
• vb2_verify_memory_type(9)
• vb2_request_object_is_buffer(9)
• vb2_request_buffer_cnt(9)

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mwah 💋 — source: ./include/media, dated October 2026, page: vb2_thread_start(9). That’s the whole manual, bestie — go slay. 🫶✨