On Mon, Apr 13, 2015 at 11:33:09AM +0200, Ingo Molnar wrote: > Limitations: this is a regular block device, and since the pmem areas > are not struct page backed, they are invisible to the rest of the > system (other than the block IO device), so direct IO to/from pmem > areas, direct mmap() or XIP is not possible yet. The page cache will > also shadow and double buffer pmem contents, etc.
Unless you use the DAX support in ext2/4 and soon XFS, in which case we avoid that double buffering when doing read/write and mmap -- 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/
