Commit a79050434b45 ("blk-rq-qos: refactor out common elements of
blk-wbt") introduce two wbt enable problems. The first one will cause
false positive check by rwb_enabled() and lead to IO hung, the second
one is wbt_enable_default() could not re-enable wbt after switch
elevator back from bfq to other one.
Zhang Yi (2):
blk-wbt: introduce a new disable state to prevent false positive by
rwb_enabled()
blk-wbt: make sure throttle is enabled properly
block/blk-wbt.c | 11 ++++++++---
block/blk-wbt.h | 1 +
2 files changed, 9 insertions(+), 3 deletions(-)
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2.31.1
