On Thu, Mar 5, 2015 at 3:59 AM, Boaz Harrosh <b...@plexistor.com> wrote: > > One of the current shortcomings of the NVDIMM/PMEM > support is that this memory does not have a page-struct(s) > associated with its memory and therefor cannot be passed > to a block-device or network or DMAed in any way through > another device in the system. > > The use of add_persistent_memory() fixes all this. After this patch > an FS can do: > bdev_direct_access(,&pfn,);
Hmm, can we do this mapping on demand per direct access mapping rather than unconditionally for each range that pmem is handling? Going forward I don't think we want to be tied to guaranteeing that plain bdev_direct_access() always yields pfn_to_page()-capable pfns. Perhaps a DAX_MAP_PFN flag or something along those lines? -- 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/
