Re: [PATCH v10 12/12] drivers/block/pmem: Map NVDIMM with ioremap_wt()

[Ingo Molnar]

* Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote:

> You answered the wrong question. :) I understand the point of the non-temporal 
> stores -- I don't understand the point of using non-temporal stores to *WB 
> memory*.  I think we should be okay with having the kernel mapping use WT 
> instead.

WB memory is write-through, but they are still fully cached for reads.

So non-temporal instructions influence how the CPU will allocate (or not allocate) 
WT cache lines.

Thanks,

	Ingo
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