Omar had some valid complaints about the previous patchset, mostly around the fact that we should not be updating depths on a per-IO basis. He's right. In fact, BFQ oddly enough does it from the ->limit_depth hook, but the shallow depth counts remain static.
This series cleans that up the ->limit_depth() handling, and keeps it out of the hot path. Mike, this should (still) fix your hangs with BFQ. This series is (functionally) identical to the bundled up version I sent you earlier. block/bfq-iosched.c | 113 +++++++++++++++++++++++++----------------------- block/bfq-iosched.h | 6 -- block/blk-mq.c | 6 +- block/kyber-iosched.c | 3 + include/linux/sbitmap.h | 11 ++++ lib/sbitmap.c | 19 +++++++- 6 files changed, 95 insertions(+), 63 deletions(-) -- Jens Axboe
