Messages in this thread | | | From | Thomas Schlichter <> | Subject | Re: [RFC Patch] use MTRR for write combining if PAT is not available | Date | Fri, 23 Oct 2009 09:24:54 +0200 |
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Suresh Siddha wrote: > On Thu, 2009-10-22 at 21:31 -0700, Jesse Barnes wrote: > > Here's a quick & dirty version, totally untested. A cleaner approach > > would be to separate the WC mapping routines and hide the return > > -EINVAL in arch specific code... > > Jesse How about this patch? Doing this in x86 is cleaner. > > I would like Acks/sign-offs-by Thomas, Eric and Jesse, if it is ok with > this patch and works.
Hmm, at this point I already was more than a week ago: http://marc.info/?l=linux-kernel&m=125537770514713&w=2
OK, I also modified ioremap() and set_memory_wc() but your patch is just part of what I did there...
And Eric Anholt answered: > Seems like we should install an MTRR instead. Requiring userland to set > up the MTRR on the kernel's behalf is backwards.
Where I totally agree with him.
Regards, Thomas
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