From: Omar Sandoval <osandov@xxxxxx>
This series ends our abuse of sysfs and puts all of the debugging information
in debugfs instead. This has a few benefits:
1. Removes the possibility of userspace being stupid and relying on something
in sysfs that we only exposed for debugging.
2. Lifts the limitations of sysfs, including the one-value-per-file convention
and maximum of one page of output.
3. Allows us to add more debugging information that we often want but don't
have when debugging a live system.
Thanks!
Omar
Omar Sandoval (10):
blk-mq: create debugfs directory tree
blk-mq: add hctx->{state,flags} to debugfs
blk-mq: move hctx->dispatch and ctx->rq_list from sysfs to debugfs
blk-mq: add extra request information to debugfs
sbitmap: add helpers for dumping to a seq_file
blk-mq: export software queue pending map to debugfs
blk-mq: move tags and sched_tags info from sysfs to debugfs
blk-mq: add tags and sched_tags bitmaps to debugfs
blk-mq: move hctx io_poll, stats, and dispatched from sysfs to debugfs
blk-mq: move hctx and ctx counters from sysfs to debugfs
block/Makefile | 1 +
block/blk-mq-debugfs.c | 750 ++++++++++++++++++++++++++++++++++++++++++++++++
block/blk-mq-sysfs.c | 248 ++--------------
block/blk-mq-tag.c | 27 --
block/blk-mq-tag.h | 1 -
block/blk-mq.c | 2 +
block/blk-mq.h | 33 +++
include/linux/blkdev.h | 5 +
include/linux/sbitmap.h | 34 +++
lib/sbitmap.c | 83 ++++++
10 files changed, 929 insertions(+), 255 deletions(-)
create mode 100644 block/blk-mq-debugfs.c
--
2.11.0
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