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SubjectRe: [PATCH] x86/pat: Fix off-by-one bugs in interval tree search

> > uncached-minus @ 0xfed91000-0xfed92000
> > uncached-minus @ 0xff340000-0xff341000
> > write-combining @ 0x4000000000-0x4010000000
> > uncached-minus @ 0x4010000000-0x4010001000

On Sun, 1 Dec 2019, Ingo Molnar wrote:

> I believe this is the region that caused the problem, the 0x4010000000
> 'end' address of the WC region is the same as the 0x4010000000 'start'
> address of the UC- region that follows it.

> > write-combining @ 0x604a800000-0x604b000000
> > uncached-minus @ 0x604b100000-0x604b110000

> This WC region was probably unaffected by the bug.

For my education, and for completeness' sake, is there a proc/sys entry
that would tell me which device/module has reserved which PAT region?

-Kenny

--
Kenneth R. Crudup Sr. SW Engineer, Scott County Consulting, Silicon Valley

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