vmw_bo_dirty_pre_unmap(9)

✨ NAME ✨

okay so vmw_bo_dirty_pre_unmap is the star of this Kernel API Manual page, and its whole deal is: write-protect and pick up dirty pages before an unmap_mapping_range operation. no cap, that's the vibe. 💅

🌸 SYNOPSIS 🌸

void vmw_bo_dirty_pre_unmap (struct vmw_bo *vbo , pgoff_t start ,
       pgoff_t end );

🎀 ARGUMENTS 🎀

• vbo — The buffer object, bestie. 🫶
• start — First page of the range within the buffer object.
• end — Last page of the range within the buffer object + 1. yes, plus one, don't forget. ✨

💅 DESCRIPTION 💅

so here's the tea: if we're using the _PAGETABLE scan method, we may leak dirty pages when calling unmap_mapping_range. 😭 this function makes sure we pick up all dirty pages. literally its whole job. 👑

🔥 SEE ALSO 🔥

bestie, go read these next — the Kernel file and its whole friend group:

• Kernel file ./drivers/gpu/drm/vmwgfx/vmwgfx_page_dirty.c
• struct vmw_bo_dirty(9)
• vmw_bo_dirty_scan_pagetable(9)
• vmw_bo_dirty_scan_mkwrite(9)
• vmw_bo_dirty_scan(9)
• vmw_bo_dirty_unmap(9)
• vmw_bo_dirty_add(9)
• vmw_bo_dirty_release(9)
• vmw_bo_dirty_transfer_to_res(9)
• vmw_bo_dirty_clear_res(9)

xoxo, your vmw_bo_dirty_pre_unmap(9) bestie 💖 — sourced from ./drivers/gpu/drm/vmwgfx, dated October 2026. 🫶