Hi Jens,
this series contains an already proposed patch by Luca, plus six new
patches. The goals of these patches are summarized in the subject of
this cover letter. I'm including Luca's patch here, because it enabled
the actual use of stable merge, and, as such, triggered an otherwise
silent bug. This series contains also the fix for that bug ("block,
bfq: avoid delayed merge of async queues"), tested by Holger [1].

Thanks,
Paolo

[1] https://lkml.org/lkml/2021/5/18/384

Luca Mariotti (1):
  block, bfq: fix delayed stable merge check

Paolo Valente (5):
  block, bfq: let also stably merged queues enjoy weight raising
  block, bfq: consider also creation time in delayed stable merge
  block, bfq: avoid delayed merge of async queues
  block, bfq: check waker only for queues with no in-flight I/O
  block, bfq: reset waker pointer with shared queues

Pietro Pedroni (1):
  block, bfq: boost throughput by extending queue-merging times

 block/bfq-iosched.c | 68 +++++++++++++++++++++++++++++++++++----------
 1 file changed, 53 insertions(+), 15 deletions(-)

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2.20.1