vmw_cmdbuf_try_alloc(9)

📦 version 7.3.1, in nixpkgs unstable

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

okay so. picture this: you're deep in the kernel, you need buffer space, and you don't wanna block. that's literally this function's whole vibe. it's in section 9 of the Kernel API Manual, and honestly? she's giving "polite attempt, no promises." 🎀

🌸 NAME 🌸

vmw_cmdbuf_try_alloc — try to allocate buffer space from the main pool. bestie, try is the whole point of the name, ok? no cap.

✨ SYNOPSIS ✨

bool vmw_cmdbuf_try_alloc (struct vmw_cmdbuf_man *man , struct
       vmw_cmdbuf_alloc_info *info );

she returns a bool. she does not elaborate. 💅

🦋 ARGUMENTS 🦋

  • man — the command buffer manager. the main character of this whole operation, tbh. 👑
  • info — the allocation info. on entry it holds the size; on a successful return it's holding the allocated mm node. so like, she goes in with a wish and comes out with the goods. 🫶

🔥 DESCRIPTION 🔥

so here's the tea ☕: this function tries to allocate buffer space from the main pool. that's it, that's the mission.

returns true if it succeeded — slay, we love a success. ✨

and if a fatal error got hit along the way? 😭 the error code gets returned in info->ret. so check that field, bestie, don't just vibe off the boolean and call it a day.

fr fr: entry = size, success = allocated mm node, fatal error = code in info->ret. all three facts, all accounted for, no details lost. 💖

🌈 SEE ALSO 🌈

like, the entire friend group 🫶 — kernel file ./drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf.c and:

okay and before you go — this page lives in ./drivers/gpu/drm/vmwgfx, dated October 2026, and it's page vmw_cmdbuf_try_alloc(9) of the Kernel API Manual. mwah 💋 go read the whole friend group, iykyk. 🧚💜

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