Re: [PATCH v4 0/7] mtrr, mm, x86: Enhance MTRR checks for huge I/O mapping

Andrew Morton
2015-03-24T22:43:27Z

On Tue, 24 Mar 2015 16:08:34 -0600 Toshi Kani <toshi.kani@hp.com> wrote:

> This patchset enhances MTRR checks for the kernel huge I/O mapping,
> which was enabled by the patchset below:
> https://lkml.org/lkml/2015/3/3/589
>
> The following functional changes are made in patch 7/7.
> - Allow pud_set_huge() and pmd_set_huge() to create a huge page
> mapping to a range covered by a single MTRR entry of any memory
> type.
> - Log a pr_warn() message when a specified PMD map range spans more
> than a single MTRR entry. Drivers should make a mapping request
> aligned to a single MTRR entry when the range is covered by MTRRs.
>

OK, I grabbed these after barely looking at them, to get them a bit of
runtime testing.

I'll await guidance from the x86 maintainers regarding next steps?