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SubjectRe: [PATCH] x86: disable_mtrr_trim only need for x86_64
Yinghai Lu wrote:
> [PATCH] x86: disable_mtrr_trim only need for x86_64
> mtrr_trim_uncached_memory is only used in x86_64,
> so disable_mtrr_trim is not needed for x86_32
> Signed-off-by: Yinghai Lu <>

That seems like a bug, and if so this patch goes the wrong direction.
(If the 32-bit code has another solution for the same problem, they
should be unified.)

The trimming of uncachable memory affects both 32- and 64-bit kernels;
it's the same hardware, and even 32-bit kernels (with PAE) can access
memory above 4 GB.

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