Dan Williams <[email protected]> writes: > On Thu, Oct 22, 2015 at 1:48 PM, Jeff Moyer <[email protected]> wrote: >> Dan Williams <[email protected]> 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 ;-).
OK. Patch is harmless. Reviewed-by: Jeff Moyer <[email protected]> -- 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/
