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 fast storage devices like NVDIMM. Patch 1 eliminates duplicated inode_dio_begin()/inode_dio_end() calls. Patch 2 converts some ext4 statistics counts into percpu counts using the helper functions. Waiman Long (2): ext4: Pass in DIO_SKIP_DIO_COUNT flag if inode_dio_begin() called ext4: Make cache hits/misses per-cpu counts fs/ext4/extents_status.c | 38 +++++++++++++++++++++++++++++--------- fs/ext4/extents_status.h | 4 ++-- fs/ext4/indirect.c | 10 ++++++++-- fs/ext4/inode.c | 12 +++++++++--- 4 files changed, 48 insertions(+), 16 deletions(-)
