libie_xn_che...sync_timeout(9)
π libie_xn_check_async_timeout β check for asynchronous message timeouts β¨
okay bestie, welcome to the Kernel API Manual π β yes, that's the manual name, and yes it's giving very serious kernel business. this page is about libie_xn_check_async_timeout, one tiny function with a big job. let's get into it π¦
πΈ NAME πΈ
libie_xn_check_async_timeout β literally just checking for asynchronous message timeouts π
β¨ SYNOPSIS β¨
void libie_xn_check_async_timeout (struct libie_ctlq_xn_manager *xnm );
so clean, so simple, no return value, no drama. she returns void and minds her own business π«Ά
π ARGUMENTS π
xnmβ the Xn transaction manager π that's it, that's the whole argument list. one (1) pointer, she's low-maintenance.
π DESCRIPTION π
okay so what does she actually do? she calls the corresponding callback to notify the caller about the timeout π β like a little "hey bestie, time's up" ping.
she does this by iterating free_xns_bm locklessly π³ β no cap, no lock, just vibes. and because that's a little chaotic, any potential races get caught under xn->xn_lock π₯ so it's fine, the safety net is real.
lowkey important: the lockless iteration is a potential race situation β that's straight from the source, don't come for me. the races are caught under xn->xn_lock, periodt π
π SEE ALSO π
the friend group π β and also the kernel file:
Kernel file ./drivers/net/ethernet/intel/libie/controlq.c
libie_ctlq_free_fq(9)libie_ctlq_init_fq(9)libie_ctlq_prep_rx_desc(9)libie_ctlq_post_rx_buffs(9)libie_ctlq_free_tx_msgs(9)libie_ctlq_alloc_tx_msgs(9)libie_cp_free_desc_mem(9)libie_ctlq_dealloc_ring_res(9)libie_cp_alloc_desc_mem(9)libie_ctlq_alloc_queue_res(9)libie_ctlq_init_regs(9)libie_find_ctlq(9)libie_ctlq_add(9)libie_ctlq_remove(9)libie_ctlq_init(9)libie_ctlq_deinit(9)libie_ctlq_tx_desc_from_msg(9)libie_ctlq_send_desc_avail(9)libie_ctlq_send(9)libie_ctlq_send_clean(9)libie_ctlq_fill_rx_msg(9)libie_ctlq_recv(9)libie_ctlq_xn_pop_free(9)__libie_ctlq_xn_push_free(9)libie_ctlq_xn_push_free(9)libie_ctlq_xn_deinit_dma(9)libie_ctlq_xn_init_dma(9)libie_ctlq_xn_process_recv(9)libie_ctlq_xn_recv(9)libie_cp_map_dma_mem(9)libie_cp_unmap_dma_mem(9)libie_ctlq_xn_process_send(9)libie_ctlq_xn_send(9)struct libie_ctlq_xn_rel_tx_ctx(9)libie_ctlq_xn_rel_tx_buf(9)libie_ctlq_xn_send_clean(9)libie_ctlq_xn_shutdown(9)libie_ctlq_xn_deinit(9)libie_ctlq_xn_init(9)
β sign-off β
and that's the page!! π the source path is ./drivers/net/ethernet/intel/l... and this cutie is dated October 2026 π
β manifesting that deadline energy. stay lockless, stay safe under xn->xn_lock, and remember: the timeout callback is always there to tell you the truth π§π
bye bestie, go read some more kernel docs πβ¨
π¦ where this page comes from
- nixpkgs unstable: linux-manual 7.3.1
- π girlified by deepseek-ai/DeepSeek-V4.1-Flash-1017 on : a language model's rewrite of the original, under its terms