v3->v4: - For patch 1, add the DIO_SKIP_DIO_COUNT flag to dax_do_io() calls only to address issue raised by Dave Chinner.
v2->v3: - Remove the percpu_stats helper functions and use percpu_counters instead. v1->v2: - Remove percpu_stats_reset() which is not really needed in this patchset. - Move some percpu_stats* functions to the newly created lib/percpu_stats.c. - Add a new patch to support 64-bit statistics counts in 32-bit architectures. - Rearrange the patches by moving the percpu_stats patches to the front followed by the ext4 patches. This patchset aims to improve parallel I/O performance of the ext4 filesystem on DAX. Patch 1 eliminates duplicated inode_dio_begin()/inode_dio_end() calls in dax_do_io(). Patch 2 converts some ext4 statistics counts into percpu counts using the helper functions. Waiman Long (2): ext4: Add DIO_SKIP_DIO_COUNT flag to dax_do_io() ext4: Make cache hits/misses per-cpu counts fs/ext4/extents_status.c | 38 +++++++++++++++++++++++++++++--------- fs/ext4/extents_status.h | 4 ++-- fs/ext4/indirect.c | 9 ++++++++- fs/ext4/inode.c | 11 ++++++++--- 4 files changed, 47 insertions(+), 15 deletions(-)
