mmu_interval_read_retry(9)

💅 mmu_interval_read_retry(9) — like, the Kernel API Manual, bestie ✨

okay so welcome to the glow-up of mmu_interval_read_retry, straight out of the Kernel API Manual. she's a bool-returning icon and she's here to close out a read side critical section against a VA range. no cap, this one's important, so pay attention 🎀

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✨ NAME ✨

mmu_interval_read_retry — bestie, this is how you end a read side critical section against a VA range. that's the whole vibe. 🦋

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🌸 SYNOPSIS 🌸

bool mmu_interval_read_retry (struct mmu_interval_notifier *interval_sub
, unsigned long seq );

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🧚 ARGUMENTS 🧚

• interval_sub — the subscription. yes, THE subscription. she's the main character here 👑
• seq — the return of the paired mmu_interval_read_begin. like, you gotta bring back what her sister gave you, that's the whole deal 💖

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🔥 DESCRIPTION 🔥

okay so listen up, because this is a MUST: you have to call this under a user provided lock that is also held unconditionally by op->invalidate when it calls mmu_interval_set_seq. not optional. not "ehh probably fine". MUST. 💀

each call should be paired with a single mmu_interval_read_begin, and it should be used to conclude the read side. one begin, one retry-check, that's the ship dynamic 🫶

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⭐ RETURN ⭐

returns true if an invalidation collided with this critical section 😭 — and that means the caller should retry. like, try again babe, the vibes were off the first time 🙈

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🌈 SEE ALSO 🌈

• Kernel file ./include/linux/mmu_notifier.h
• enum mmu_notifier_event(9)
• struct mmu_interval_notifier_finish(9)
• struct mmu_interval_notifier_ops(9)
• mmu_interval_set_seq(9)
• mmu_interval_check_retry(9)

these are literally the friend group, go read them too 🍓

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mwah 💜 this page came to you from ./include/linux, stamped October 2026 — that's the source and the date, bestie, noted and slayed. periodt. ✨