On Thu, Oct 22, 2015 at 1:48 PM, Jeff Moyer <jmo...@redhat.com> wrote: > Dan Williams <dan.j.willi...@intel.com> writes: > >> Both, __dax_pmd_fault, and clear_pmem() were taking special steps to >> clear memory a page at a time to take advantage of non-temporal >> clear_page() implementations. However, x86_64 does not use >> non-temporal instructions for clear_page(), and arch_clear_pmem() was >> always incurring the cost of __arch_wb_cache_pmem(). >> >> Clean up the assumption that doing clear_pmem() a page at a time is more >> performant. > > Wouldn't another solution be to actually use non-temporal stores?
Sure. > Why did you choose to punt? Just a priority call at this point. Patches welcome of course ;-). -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
