On Tue, Nov 07, 2017 at 05:03:11PM -0500, Mikulas Patocka wrote: > Hi > > I am developing a driver that uses persistent memory for caching. A > persistent memory device can be mapped in several discontiguous ranges. > > The kernel has a function vmap that takes an array of pointers to pages > and maps these pages to contiguous linear address space. However, it can't > be used on persistent memory because persistent memory may not be backed > by page structures. > > This patch introduces a new function vmap_pfn, it works like vmap, but > takes an array of pfn_t - so it can be used on persistent memory. How is cache flushing going to work for this interface assuming that your write to/from the virtual address and expect it to be persisted on pmem? -- 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>
