Messages in this thread | | | Subject | Re: [RFC Patch] use MTRR for write combining if PAT is not available | From | Suresh Siddha <> | Date | Thu, 22 Oct 2009 17:11:57 -0700 |
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On Thu, 2009-10-22 at 16:10 -0700, Jesse Barnes wrote: > On Thu, 22 Oct 2009 14:47:30 -0700 > Suresh Siddha <suresh.b.siddha@intel.com> wrote: > > > On Thu, 2009-10-22 at 08:34 -0700, Eric Anholt wrote: > > > Can we just not create the _wc sysfs entry if we don't have PAT? I > > > don't think there's userland relying on its presence as opposed to > > > the non-_wc entry. > > > > Yes indeed. Jesse do you see an issue with this? This is simple and > > clean. Thanks Eric. > > Yeah, I think that will be fine. In fact, older versions of > libpciaccess will behave better if we do it that way (iirc it only > allocates an MTRR if the resource_wc file doesn't exist or fails to get > mapped).
Eric, care to send the patch?
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