Re: [PATCH v4 0/7] mtrr, mm, x86: Enhance MTRR checks for huge I/O mapping
From: Toshi Kani
Date: Fri Apr 03 2015 - 11:40:47 EST
On Fri, 2015-04-03 at 08:33 +0200, Ingo Molnar wrote:
> * Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
> > On Tue, 24 Mar 2015 16:08:34 -0600 Toshi Kani <toshi.kani@xxxxxx> 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?
> Could you please send the current version of them over to us if your
> testing didn't find any problems?
> I'd like to take a final look and have them cook in the x86 tree as
> well for a while and want to preserve your testing effort.
This patchset is on top of the following patches in the -mm tree.
(Patches apply from the bottom to the top.)
2. Build error fixes and cleanups
1. Kernel huge I/O mapping support
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