ENUM UM_TIMETRAVEL_SHARED_MEM_FDS(9)

💅 enum um_timetravel_shared_mem_fds — from the Kernel API Manual

Okay so bestie, picture this: you're deep in the kernel, the START message just went out, and the ACK comes back with some file descriptors riding along. This little enum is literally the guest list 🎀 — it tells you which slot in that control message holds which fd. That's it, that's the whole vibe. No cap.

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✨ NAME ✨

enum um_timetravel_shared_mem_fds — the fds that get sent in the ACK message for the START message 🦋 iykyk

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🌸 SYNOPSIS 🌸

enum um_timetravel_shared_mem_fds {
    UM_TIMETRAVEL_SHARED_MEMFD ,
    UM_TIMETRAVEL_SHARED_LOGFD ,
    UM_TIMETRAVEL_SHARED_MAX_FDS

};

Look at her. Three constants, zero drama, absolute main character energy 👑

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🎀 Constants 🎀

• UM_TIMETRAVEL_SHARED_MEMFD — the index of the shared memory file descriptor up in the control message 💖 like, this is the slot, okay?
• UM_TIMETRAVEL_SHARED_LOGFD — the index of the logging file descriptor in the control message 📝 your logs live here, periodt
• UM_TIMETRAVEL_SHARED_MAX_FDS — literally just the number of fds listed here 🔢 it's giving "count your blessings" but make it file descriptors

Heads up bestie — these are indices, not the fds themselves. The actual fd is hanging out in the control message. Don't @ me, that's just what the page says 💅

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🦋 SEE ALSO 🦋

Kernel file ./include/uapi/linux/um_timetravel.h — go read it, it slays ✨

And the whole friend group:

• struct um_timetravel_msg(9)
• enum um_timetravel_start_ack(9)
• enum um_timetravel_ops(9)
• enum um_timetravel_schedshm_cap(9)
• enum um_timetravel_schedshm_flags(9)
• Time travel shared memory overview(9)
• union um_timetravel_schedshm_client(9)
• struct um_timetravel_schedshm(9)

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Fr fr, go read the overview page first if you're new here — it's the vibe check for the whole time-travel shared memory situation 🌈

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That's the page, bestie! 🫶 This gem lives in ./include/uapi/linux, dated October 2026, and it's page enum um_tim...ared_mem_fds(9) of the Kernel API Manual. Obsessed. Mwah 💋🌸