__relay_write(9)

✨ NAME ✨

__relay_write — write data into the channel 💖 straight outta the Kernel API Manual, bestie.

🌸 SYNOPSIS 🌸

void __relay_write (struct rchan *chan , const void *data , size_t
       length );

🎀 ARGUMENTS 🎀

• chan — the relay channel, periodt 🫶
• data — the data to be written ✨
• length — number of bytes to write 🔢

💅 DESCRIPTION 💅

okay so __relay_write writes data into the current cpu's channel buffer. literally its whole job 💖

It protects the buffer by disabling preemption. no cap, that's the safety vibe 🛡️

Use relay_write if you might be logging from interrupt context — that's the one you want in that situation, iykyk 👑

🦋 SEE ALSO 🦋

• Kernel file ./include/linux/relay.h 📁
• relay_write(9) 🌟
• relay_reserve(9) 💫
• subbuf_start_reserve(9) 🧚

bye bestie — this was __relay_write(9) from ./include/linux, dated October 2026 💅🫶