Hi, this series adds a debugfs hierarchy to DRBD. It unveils a lot of information about timing of states/stages of IO requests.
This information helps a lot while optimizing DRBD for SSD based IO stacks. Dan Carpenter (1): drbd: silence underflow warning in read_in_block() Lars Ellenberg (22): drbd: poison free'd device, resource and connection structs drbd: fix drbd_destroy_device reference count updates drbd: track meta data IO intent, start and submit time drbd: gather detailed timing statistics for drbd_requests drbd: add lists to find oldest pending requests drbd: add caching oldest request pointers for replication stages drbd: improve throttling decisions of background resynchronisation drbd: track timing details of peer_requests drbd: register peer requests on read_ee early drbd: track details of bitmap IO drbd: debugfs: add basic hierarchy drbd: debugfs: add in_flight_summary data drbd: debugfs: deal with destructor racing with open of debugfs file drbd: debugfs: Add in_flight_summary drbd: debugfs: add callback_history drbd: debugfs: add per volume oldest_requests drbd: debugfs: add version tag to debugfs files drbd: debugfs: add per connection oldest requests drbd: debugfs: add per device data_gen_id drbd: resync should only lock out specific ranges drbd: drop spurious parameters from _drbd_md_sync_page_io drbd: implicitly truncate cpu-mask drivers/block/drbd/Makefile | 1 + drivers/block/drbd/drbd_actlog.c | 80 +++- drivers/block/drbd/drbd_bitmap.c | 70 ++- drivers/block/drbd/drbd_debugfs.c | 958 +++++++++++++++++++++++++++++++++++++ drivers/block/drbd/drbd_debugfs.h | 39 ++ drivers/block/drbd/drbd_int.h | 175 ++++++- drivers/block/drbd/drbd_main.c | 116 +++-- drivers/block/drbd/drbd_nl.c | 4 +- drivers/block/drbd/drbd_proc.c | 3 + drivers/block/drbd/drbd_receiver.c | 138 ++++-- drivers/block/drbd/drbd_req.c | 411 +++++++++++----- drivers/block/drbd/drbd_worker.c | 59 ++- include/linux/drbd.h | 2 +- lib/lru_cache.c | 21 +- 14 files changed, 1784 insertions(+), 293 deletions(-) create mode 100644 drivers/block/drbd/drbd_debugfs.c create mode 100644 drivers/block/drbd/drbd_debugfs.h -- 1.9.1 -- 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/
