Our test found that bfq_weight_counter can leak quite easy. This problem can be fixed by patch 4, and other patches is needed to backport patch 4. Federico Motta (2): block, bfq: improve asymmetric scenarios detection block, bfq: fix asymmetric scenarios detection Paolo Valente (3): block, bfq: fix decrement of num_active_groups block, bfq: fix queue removal from weights tree block, bfq: fix use after free in bfq_bfqq_expire block/bfq-iosched.c | 287 +++++++++++++++++++++++++++----------------- block/bfq-iosched.h | 76 +++++++++--- block/bfq-wf2q.c | 56 +++++---- 3 files changed, 270 insertions(+), 149 deletions(-) -- 2.31.1