tcp_delack_timer(9)

✨ tcp_delack_timer(9) ✨

okay so this is a page from the Kernel API Manual — yes bestie, we're reading kernel docs now, it's giving scholar era 💅

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🎀 NAME 🎀

tcp_delack_timer — the TCP delayed ACK timeout handler, aka the little timer that says "hold up, let me ack that in a sec" 👑

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🌸 SYNOPSIS 🌸

void tcp_delack_timer (struct timer_list *t );

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🦋 ARGUMENTS 🦋

• t — a pointer to the timer. and like… it gets casted to struct sock * 😭 that's the whole trick, the timer is lowkey a socket in disguise. iykyk

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🌈 DESCRIPTION 🌈

So this function gets (indirectly!) called when the kernel timer for a TCP packet of this socket expires ⏰✨ "Indirectly" is doing a lot of work there, so don't come for me — that's literally what the page says.

Once it's up, it calls tcp_delack_timer_handler to do the actual work 💪 like, this function is the main character who shows up and then delegates to the real main character. obsessed.

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💖 RETURN 💖

Nothing. void. it returns nothing at all, no notes, no value, just vibes 🫶

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🔥 SEE ALSO 🔥

• Kernel file ./net/ipv4/tcp_timer.c
• tcp_write_err(9)
• tcp_out_of_resources(9)
• tcp_orphan_retries(9)
• retransmits_timed_out(9)
• tcp_retransmit_timer(9)

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ngl the whole friend group lives in ./net/ipv4 — go say hi 🌸

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and that's the page, bestie! shoutout to ./net/ipv4 and the October 2026 edition of the Kernel API Manual for making this little gem happen 💜🎀 slay, happy timer watching ⏱️✨