rcuref_put_slowpath(9)

✨ rcuref_put_slowpath(9) — the kernel API glow-up ✨

okay so bestie, buckle up, because this one is from the Kernel API Manual and it's all about the slowpath of __rcuref_put(). it's giving "the backup dancer who actually saves the whole performance" 💅

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🌸 NAME 🌸

rcuref_put_slowpath — literally the Slowpath of __rcuref_put(). that's it. that's the whole vibe ✨

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🦋 SYNOPSIS 🦋

bool rcuref_put_slowpath (rcuref_t *ref , unsigned int cnt );

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🎀 ARGUMENTS 🎀

• ref — Pointer to the reference count. it's the little counter we're all obsessed with 💖
• cnt — The resulting value of the fastpath decrement. like, the number you get after the fastpath already did its thing.

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💜 DESCRIPTION 💜

so this function gets invoked when the reference count is outside of the valid zone 🚨 like, the fastpath looked at it and went "nope, not my department, this is above my pay grade" and handed it over.

it returns False if there are still active references, or if the put raced with a concurrent get/put pair 😭 the way that race condition sneaks in… anyway, heads up:

bestie, when this returns False, the caller is not allowed to deconstruct the protected object. no cap. just don't. 🙈

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🔥 RETURN 🔥

it returns True if this was the last reference with no future references possible 👑✨ that's the signal to the caller that it can safely schedule the object — the one protected by the reference counter — for deconstruction. slay. the object gets to retire in peace 🫶

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🧚 SEE ALSO 🧚

• Kernel file ./lib/rcuref.c
• rcuref_get_slowpath(9)

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and that's the whole page, bestie! this one lives in ./lib, from October 2026, and shoutout to the source/version line: ./lib on October 2026 for rcuref_put_slowpath(9) — mwah, iconic, no notes 💅💖