Messages in this thread | | | Date | Sat, 19 Jan 2008 21:37:16 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] x86: disable_mtrr_trim only need for x86_64 |
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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 <yinghai.lu@sun.com>
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.
-hpa
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