On Sun, 2015-08-02 at 12:07 +0200, Thomas Gleixner wrote: > On Thu, 23 Jul 2015, Toshi Kani wrote: > > On Thu, 2015-07-23 at 09:36 -0600, Jan Beulich wrote: > > > > > > > > > > On 23.07.15 at 17:25, <[email protected]> wrote: > > > > Yes, I agree with you. But such risk is very low -- 1) the regular > > > > case > > > > (no fallback) is used most of the cases, 2) the code using WT knows > > > > what > > > > type of memory it is dealing with. For example, pmem may map NVDIMM > > > > > > > > with > > > > WT, and any sane BIOS sets MTRR to WB for NVDIMM. > > > > > > Do the words "sane" and "BIOS" really fit together in your opinion? > > > > :-) > > > > Anyway, I am not disagreeing with you... When UC is ready for both > > regular > > memory and IO memory, it should be changed to fall back to UC. > > What's the resolution of this discussion? Is that patch correct as is > or do we get an updated version?
Yes, this patch is correct and we are in agreement. What Jan mentioned about falling back to UC, instead of UC-, is a separate item, and the code does not support it yet. Thanks, -Toshi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
