On Wed, 8 Nov 2017, Christoph Hellwig wrote: > On Wed, Nov 08, 2017 at 07:33:09AM -0500, Mikulas Patocka wrote: > > We could use the function clwb() (or arch-independent wrapper dax_flush()) > > - that uses the clflushopt instruction on Broadwell or clwb on Skylake - > > but it is very slow, write performance on Broadwell is only 350MB/s. > > > > So in practice I use the movnti instruction that bypasses cache. The > > write-combining buffer is flushed with sfence. > > And what do you do for an architecture with virtuall indexed caches? Persistent memory is not supported on such architectures - it is only supported on x86-64 and arm64. Mikulas -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
