On Thu, Jan 17, 2019 at 8:29 AM Jeff Moyer <jmoyer@xxxxxxxxxx> wrote: > > Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> writes: > > > Persistent memory is cool. But, currently, you have to rewrite > > your applications to use it. Wouldn't it be cool if you could > > just have it show up in your system like normal RAM and get to > > it like a slow blob of memory? Well... have I got the patch > > series for you! > > So, isn't that what memory mode is for? > https://itpeernetwork.intel.com/intel-optane-dc-persistent-memory-operating-modes/ That's a hardware cache that privately manages DRAM in front of PMEM. It benefits from some help from software [1]. > Why do we need this code in the kernel? This goes further and enables software managed allocation decisions with the full DRAM + PMEM address space. [1]: https://lore.kernel.org/lkml/154767945660.1983228.12167020940431682725.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/
