Re: [PATCH v2] x86: PAT: Documentation: rewrite "MTRR effects on PAT / non-PAT systems"

From	"Luis R. Rodriguez" <mcgrof@kernel.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2] x86: PAT: Documentation: rewrite "MTRR effects on PAT / non-PAT systems"
Date	2016-03-15 23:30 +0100
Message-ID	<rd5Ds-8px-7@gated-at.bofh.it> (permalink)
References	<r9590-4m4-27@gated-at.bofh.it> <r96HM-5lt-15@gated-at.bofh.it> <r9j2i-5EO-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

On Sat, Mar 05, 2016 at 12:52:55PM +0100, Ingo Molnar wrote:
> 
> * Luis R. Rodriguez <mcgrof@kernel.org> wrote:
> 
> > The current documentation refers to using set_memory_wc() as a
> > possible hole strategy when you have overlapping ioremap() regions,
> 
> The whole explanation should talk about virtual aliases over the same physical 
> address, not some 'overlapping regions'.
> 
> I see where this talk about 'overlap' comes: the memtype rbtree in 
> arch/x86/mm/pat_rbtree.c indeed has memtype ranges that may overlap on the 
> physical side. But it is highly confusing to call this 'overlapping' on the driver 
> API documentation level without making it really clear what it's about.

Alright thanks, I think I'll just stick to aliasing. I'll go over the
threads and pick out only what is relevant.

  Luis

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

Re: [PATCH] x86: PAT: Documentation: update overlapping ioremap hack  recommendation "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-03-04 20:30 +0100
  Re: [PATCH] x86: PAT: Documentation: update overlapping ioremap hack  recommendation "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-03-04 22:10 +0100
    [PATCH v2] x86: PAT: Documentation: rewrite "MTRR effects on PAT / non-PAT systems" "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-03-04 23:50 +0100
      Re: [PATCH v2] x86: PAT: Documentation: rewrite "MTRR effects on PAT  / non-PAT systems" "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2016-03-05 01:10 +0100
        Re: [PATCH v2] x86: PAT: Documentation: rewrite "MTRR effects on PAT  / non-PAT systems" "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-03-05 02:10 +0100
      RE: [PATCH v2] x86: PAT: Documentation: rewrite "MTRR effects on  PAT / non-PAT systems" "Elliott, Robert (Persistent Memory)" <elliott@hpe.com> - 2016-03-05 05:50 +0100
        Re: [PATCH v2] x86: PAT: Documentation: rewrite "MTRR effects on PAT  / non-PAT systems" "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-03-15 23:30 +0100
      Re: [PATCH v2] x86: PAT: Documentation: rewrite "MTRR effects on PAT  / non-PAT systems" Ingo Molnar <mingo@kernel.org> - 2016-03-05 13:00 +0100
        Re: [PATCH v2] x86: PAT: Documentation: rewrite "MTRR effects on PAT  / non-PAT systems" "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-03-15 23:30 +0100

csiph-web