amdgpu_pasid_clear_owner(9)

💅 amdgpu_pasid_clear_owner(9) — a Kernel API Manual moment ✨

Okay bestie, so this is a page from the Kernel API Manual for amdgpu_pasid_clear_owner(9) — and yes it's as niche as it sounds, but it's lowkey iconic, come with me 🫶

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🌸 NAME 🌸

amdgpu_pasid_clear_owner — clears the owner that's associated with a PASID 💫

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✨ SYNOPSIS ✨

void amdgpu_pasid_clear_owner (u32 pasid );

That's it. One arg, no return value, no drama. Periodt.

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🎀 ARGUMENTS 🎀

• pasid — the PASID whose owner should be cleared, like literally the one we're yeeting the owner off of 💅

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🦋 DESCRIPTION 🦋

So the whole vibe here: this function replaces the stored owner with NULL — while the PASID stays allocated. Not me giving the PASID a glow-up but taking away its owner, ngl that's kind of the whole point 🫶

Where it's used? It's the delayed PASID free path's bestie. It exists so that future PASID lookups cannot resolve a stale DRM file-private object while the PASID is still out here waiting for outstanding fences before it gets released. Like, no stale-object jumpscares on main 😭🚫

Fr fr, this is the "remove the name tag but keep the seat reserved" energy. The PASID is still there, its owner is just... gone 👻

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🔥 SEE ALSO 🔥

The kernel file in question, aka where the magic lives:

Kernel file ./drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c

And the whole friend group, no cap:

• amdgpu_pasid_alloc(9)
• amdgpu_pasid_free(9)
• amdgpu_pasid_lock(9)
• amdgpu_pasid_unlock(9)
• amdgpu_pasid_get_fpriv_locked(9)
• amdgpu_pasid_free_delayed(9)
• amdgpu_vmid_had_gpu_reset(9)
• amdgpu_vmid_grab_idle(9)
• amdgpu_vmid_grab_reserved(9)
• amdgpu_vmid_grab_used(9)
• amdgpu_vmid_grab(9)
• amdgpu_vmid_reset(9)
• amdgpu_vmid_reset_all(9)
• amdgpu_vmid_mgr_init(9)
• amdgpu_vmid_mgr_fini(9)
• amdgpu_pasid_mgr_cleanup(9)

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Okay that's the whole page bestie, you ate that 💖✨

Signing off from ./drivers/gpu/drm/amd/amdgpu, dated October 2026 — amdgpu_pasid_clear_owner(9) out, mwah 💋🌸