This series add a new file system I/O path that uses the iomap structure introduced for the pNFS support and support multi-page buffered writes. This was first started by Dave Chinner a long time ago, then I did beat it into shape for production runs in a very constrained ARM NAS enviroment for Tuxera almost as long ago, and now half a dozen rewrites later it's back. The basic idea is to avoid the per-block get_blocks overhead and make use of extents in the buffered write path by iterating over them instead. Note that patch 1 conflicts with Vishals dax error handling series. It would be great to have a stable branch with it so that both the XFS and nvdimm tree could pull it in before the other changes in this area. Changes since V4: - rebase to Linux 4.7-rc1 - fixed an incorrect BUG_ON statement Changes since V3: - fix DAX based zeroing - Reviews and trivial fixes from Bob Changes since V2: - fix the range for delalloc punches after failed writes - updated some changelogs Chances since V1: - add support for fiemap - fix a test fail on 1k block sizes - prepare for 64-bit length, this will be used in a follow on patchset -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
