On Fri, May 29, 2015 at 3:59 PM, Toshi Kani <toshi.k...@hp.com> wrote: > From: Toshi Kani <toshi.k...@hp.com> > > The pmem driver maps NVDIMM with ioremap_nocache() as we cannot > write back the contents of the CPU caches in case of a crash. > > This patch changes to use ioremap_wt(), which provides uncached > writes but cached reads, for improving read performance. > > Signed-off-by: Toshi Kani <toshi.k...@hp.com>
Acked-by: Dan Williams <dan.j.willi...@intel.com> ...with the caveat that I'm going to follow in behind this series with generic ioremap_cache() enabling and converting pmem to use persistent_copy() / persistent_sync() when the arch/cpu has persistent memory synchronization instructions. After the conversion ioremap_wt() will still be there for the non-persistent_sync() capable case. -- 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/
