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? -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
