radeon_mn_invalidate(9)

💅 radeon_mn_invalidate — like, the manual page, bestie

okay so this is radeon_mn_invalidate(9), straight out of the Kernel API Manual, and it's literally the callback that goes "hey bestie, the mm changed 👀". Let's get into it ✨

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🎀 NAME 🎀

radeon_mn_invalidate — the callback that notifies you about an mm change. no cap, that's the whole vibe.

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🌸 SYNOPSIS 🌸

bool radeon_mn_invalidate (struct mmu_interval_notifier *mn , const
       struct mmu_notifier_range *range , unsigned long cur_seq );

copy it exactly like that, don't @ me 💅

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🦋 ARGUMENTS 🦋

• mn — our notifier 💖 like, the one that belongs to us.
• range — the VMA that's under invalidation rn 🫶
• cur_seq — the value you pass to mmu_interval_set_seq, periodt.

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✨ DESCRIPTION ✨

So here's the tea: we block until all the BOs between start and end are idle 😴 — yes, all of them, we wait — and then we unmap them by moving them back into the system domain again. iconic behaviour honestly 👑

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💜 SEE ALSO 💜

• Kernel file ./drivers/gpu/drm/radeon/radeon_mn.c — that's where the magic lives 🧚
• radeon_mn_register(9)
• radeon_mn_unregister(9)

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ngl, if you're poking around in here you should probably also say hi to its register/unregister siblings up there 👆 iykyk

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and that's the whole page, bestie 🍓💖 sign-off time: this one came from ./drivers/gpu/drm/radeon and it's dated October 2026 — slay, go forth and invalidate responsibly 🌈⭐