Hi Jens,
The 1st patch avoids to fail driver tag allocation because of inactive
hctx, so hang risk can be killed during cpu hotplug.
The 2nd patch fixes blk_mq_all_tag_iter so that we can drain all
requests before one hctx becomes inactive.
Both fixes bf0beec0607d ("blk-mq: drain I/O when all CPUs in a hctx are
offline").
John has verified that the two can fix his request timeout issue during
cpu hotplug.
Christoph Hellwig (1):
blk-mq: split out a __blk_mq_get_driver_tag helper
Ming Lei (1):
blk-mq: fix blk_mq_all_tag_iter
block/blk-mq-tag.c | 39 ++++++++++++++++++++++++++++++++++++---
block/blk-mq-tag.h | 8 ++++++++
block/blk-mq.c | 29 -----------------------------
block/blk-mq.h | 1 -
4 files changed, 44 insertions(+), 33 deletions(-)
Cc: Dongli Zhang <dongli.zhang@xxxxxxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxx>
Cc: Daniel Wagner <dwagner@xxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: John Garry <john.garry@xxxxxxxxxx>
--
2.25.2
