set_fixed_ranges(9)

okay so bestie, this is set_fixed_ranges(9) from the Kernel API Manual — short page, big main-character energy, let’s go 💅

✨ NAME ✨

set_fixed_ranges — checks & updates the fixed-range MTRRs if they differ from the saved set.

Like, it’s literally doing a vibe check on the fixed-range MTRRs and updating them only when they’re not matching the saved set. periodt 💖

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🦋 SYNOPSIS 🦋

Here’s the signature, character for character, no cap:

int set_fixed_ranges (mtrr_type *frs );

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🎀 ARGUMENTS 🎀

• frs — a pointer to fixed-range MTRR values, saved by get_fixed_ranges. That’s the saved set the NAME section is talking about, bestie 🫶

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🌈 SEE ALSO 🌈

Kernel file to peek at:

• ./arch/x86/kernel/cpu/mtrr/generic.c

And these iconique functions are also in the group chat:

• guest_force_mtrr_state(9)
• mtrr_type_lookup(9)
• set_fixed_range(9)
• generic_get_free_region(9)
• set_mtrr_state(9)
• generic_set_mtrr(9)

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mwah 💋 — source/version: ./arch/x86/kernel/cpu/mtrr, dated October 2026. bye bestie, go check & update those fixed-range MTRRs if they differ from the saved set 🌸