Hello Jens,
Please consider the ten patches in this series for kernel v4.12.
These patches improve blk-mq debugfs support.
Thanks,
Bart.
Changes compared to v3:
- Changed the mutex_lock_interruptible() calls back to mutex_lock()
calls.
- Added a patch that renames the functions for registering and
unregistering the "mq" directory in debugfs.
- Moved the changes that add checking of the blk_mq_debugfs_register()
return value into a separate patch.
- Moved the unregistration of the "mq" directory into blk_cleanup_queue().
- Removed uninteresting information from scsi_show_rq().
- Added Reviewed-by tag to the patches that got a positive review.
Changes compared to v2:
- Changed the mutex_lock() calls in registration methods into
mutex_lock_interruptible() since these functions can be called from
the context of a user space process.
- Avoid that the blk_mq_register_dev() changes in patch 1/8 cause a
deadlock.
Changes compared to v1:
- Added two patches and replaced patch 1/6 such that debugfs
attributes are now unregistered before freeing of a blk-mq queue
starts instead of checking the "dead" queue flag.
- Changed "rq->cmd_flags ^ op" into "rq->cmd_flags & ~REQ_OP_MASK" as
proposed by Omar.
- A seq_file pointer is now passed to the new queue_rq callback function
instead of a fixed-size char buffer.
Bart Van Assche (10):
blk-mq: Register <dev>/queue/mq after having registered <dev>/queue
blk-mq: Let blk_mq_debugfs_register() look up the queue name
blk-mq-debugfs: Rename functions for registering and unregistering the
mq directory
blk-mq: Check blk_mq_debugfs_register() return value
blk-mq: Unregister debugfs attributes earlier
blk-mq: Move the "state" debugfs attribute one level down
blk-mq: Make blk_flags_show() callers append a newline character
blk-mq: Show operation, cmd_flags and rq_flags names
blk-mq: Add blk_mq_ops.show_rq()
scsi: Implement blk_mq_ops.show_rq()
block/blk-core.c | 5 +++
block/blk-mq-debugfs.c | 102 +++++++++++++++++++++++++++++++++++++++---------
block/blk-mq-sysfs.c | 64 ++++++++++++++++++++++--------
block/blk-mq.h | 14 +++----
block/blk-sysfs.c | 6 +--
drivers/scsi/scsi_lib.c | 11 ++++++
include/linux/blk-mq.h | 6 +++
7 files changed, 164 insertions(+), 44 deletions(-)
--
2.12.2
