virtqueue_enable_cb_delayed(9)

💜 virtqueue_enable_cb_delayed(9) 💜

okay so bestie, welcome to the virtqueue_enable_cb_delayed page — it lives in the Kernel API Manual and it's literally the "turn the callbacks back on but like, chill" function. slay.

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✨ NAME ✨

virtqueue_enable_cb_delayed — restart callbacks after disable_cb. that's it, that's the vibe 🎀

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🌸 SYNOPSIS 🌸

bool virtqueue_enable_cb_delayed (struct virtqueue *_vq );

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🦋 ARGUMENTS 🦋

• _vq — the struct virtqueue we're talking about. yes, that one. the queue in question. 🫶

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⭐ DESCRIPTION ⭐

so what this does is it re-enables callbacks, right? but with a little ✨twist✨ — it hints to the other side that they should delay interrupts until most of the available buffers have been processed. like "hey, don't ping me for every single one, wait till it's almost all done, k?" iconic behavior honestly.

it returns "false" if there are many pending buffers in the queue — and that's on purpose! it's how you detect a possible race between the driver checking for more work and enabling callbacks. so if you get a false, don't panic, that's just the function doing its lil vibe check on you 💅

⚠️ real talk though: the caller must ensure we don't call this with other virtqueue operations at the same time (except where noted). no cap, don't multitask on your virtqueue. it will not slay, it will be a mess 😭

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🔥 SEE ALSO 🔥

Kernel file ./drivers/virtio/virtio_ring.c — that's where the magic lives, go read it bestie it's giving main character energy 👑

• virtqueue_add_sgs(9)
• virtqueue_add_outbuf(9)
• virtqueue_add_outbuf_premapped(9)
• virtqueue_add_inbuf(9)
• virtqueue_add_inbuf_cache_clean(9)
• virtqueue_add_inbuf_ctx(9)
• virtqueue_add_inbuf_premapped(9)
• virtqueue_dma_dev(9)
• virtqueue_kick_prepare(9)
• virtqueue_notify(9)
• virtqueue_kick(9)
• virtqueue_get_buf_ctx(9)
• virtqueue_disable_cb(9)
• virtqueue_enable_cb_prepare(9)
• virtqueue_poll(9)
• virtqueue_enable_cb(9)
• virtqueue_detach_unused_buf(9)
• vring_interrupt(9)
• virtqueue_resize(9)
• virtqueue_reset(9)
• virtqueue_get_vring_size(9)
• virtqueue_map_alloc_coherent(9)
• virtqueue_map_free_coherent(9)
• virtqueue_map_page_attrs(9)
• virtqueue_unmap_page_attrs(9)
• virtqueue_map_single_attrs(9)
• virtqueue_unmap_single_attrs(9)
• virtqueue_map_mapping_error(9)
• virtqueue_map_need_sync(9)
• virtqueue_map_sync_single_range_for_cpu(9)
• virtqueue_map_sync_single_range_for_device(9)

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and that's the whole page, bestie 🧚 go forth and delay those interrupts responsibly 💖

signing off from ./drivers/virtio — October 2026 — with love from virtqueue_enable_cb_delayed(9) 🌈 mwah 💋