tracing_snapshot(9)

💅 tracing_snapshot(9) — the kernel API manual, bestie edition 💅

okay so real talk, this one's from the Kernel API Manual and it's about tracing_snapshot(9) — short name, big main-character energy ✨

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🌸 NAME 🌸

tracing_snapshot — take a snapshot of the current buffer 💖

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🎀 SYNOPSIS 🎀

void tracing_snapshot (void );

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🦋 ARGUMENTS 🦋

• void — literally no arguments. not a single one. zero. the void is voiding 🙈

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✨ DESCRIPTION ✨

okay so bestie, here's the vibe: this function causes a swap between the snapshot buffer and the current live tracing buffer. so you can use it to take snapshots of the live trace when some condition gets triggered… and then keep on tracing. slay, you get both 💅

⚠️ note note note: make sure you allocate the snapshot first, either with a tracing_snapshot_alloc, or by doing it manually with:

echo 1 > /sys/kernel/tracing/snapshot

and if the snapshot buffer is not allocated? it will stop tracing. basically making a permanent snapshot. no cap, that's forever 🫶

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🔥 SEE ALSO 🔥

Kernel file ./kernel/trace/trace.c — plus the whole friend group:

• trace_array_put(9)
• tracing_is_enabled(9)
• tracing_on(9)
• tracing_alloc_snapshot(9)
• tracer_tracing_disable(9)
• tracer_tracing_enable(9)
• tracing_off(9)
• tracer_tracing_is_on(9)
• tracing_is_on(9)
• register_tracer(9)
• tracing_start(9)
• tracing_stop(9)
• trace_buffered_event_enable(9)
• trace_buffered_event_disable(9)
• trace_dump_stack(9)
• ignore_event(9)
• trace_adjust_address(9)
• tracing_update_buffers(9)
• trace_user_fault_destroy(9)
• trace_user_fault_init(9)
• trace_user_fault_get(9)
• trace_user_fault_put(9)
• trace_user_fault_read(9)
• err_pos(9)
• tracing_log_err(9)
• trace_array_get_by_name(9)
• tracing_init_dentry(9)

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and that's the whole page, bestie 💜 this one lives in ./kernel/trace and the page itself is dated October 2026, filed under tracing_snapshot(9) — periodt ✨🎀