STRUCT DRM_PAGEMAP_DEVMEM(9)

💖 NAME 💖

struct drm_pagemap_devmem — page struct drm_pagemap_devmem(9) from the Kernel API Manual, hi bestie 🫶 — is the structure representing a GPU SVM device memory allocation. That's the whole main-character job: it's the struct for a GPU SVM device memory allocation, periodt.

🦋 SYNOPSIS 🦋

okay so here's the struct, and we keep it exactly as-is because kernel code is not a vibe to freestyle, ngl:

       struct drm_pagemap_devmem {
           struct device *dev;
           struct mm_struct *mm;
           struct completion detached;
           const struct drm_pagemap_devmem_ops *ops;
           struct drm_pagemap *dpagemap;
           size_t size;
           u64 timeslice_expiration;
           struct dma_fence *pre_migrate_fence;
        };

That's the shape of it, bestie ✨ no cap.

🫶 Members 🫶

Members? More like the whole cast of this struct, and every single one gets their moment 💅:

• dev — pointer to the device structure which the device memory allocation belongs to. It's giving "which device owns this" energy.
• mm — pointer to the mm_struct for the address space. Address-space bestie 🧚.
• detached — the completion for when the device memory allocation is detached from the device pages. Lowkey important.
• ops — pointer to the operations structure for GPU SVM device memory. The drm_pagemap_devmem_ops hookup, iykyk.
• dpagemap — the struct drm_pagemap of the pages this allocation belongs to. Literally the pagemap home base.
• size — size of the device memory allocation. Numbers don't lie 💅.
• timeslice_expiration — timeslice expiration in jiffies. Tick tock, bestie ⏳.
• pre_migrate_fence — fence to wait for or pipeline behind before migration starts. It may be NULL — so don't assume it's always there, fr fr.

🔗 SEE ALSO 🔗

go read these too, bestie — highkey obsessed with this whole kernel friend group, and they ate:

• Kernel file ./include/drm/drm_pagemap.h enum
• drm_interconnect_protocol(9)
• struct drm_pagemap_addr(9)
• drm_pagemap_addr_encode(9)
• struct drm_pagemap_ops(9)
• struct drm_pagemap(9)
• struct drm_pagemap_devmem_ops(9)
• drm_pagemap_get(9)
• drm_pagemap_get_unless_zero(9)
• struct drm_pagemap_migrate_details(9)
• drm_pagemap_page_zone_device_data(9)

xoxo, your kernel bestie 💖 — fresh from ./include/drm, dated October 2026, signing off the struct drm_pagemap_devmem(9) page. slay and goodbye ✨