On Tue, Sep 18, 2018 at 06:13:07PM +0800, Ming Lei wrote: > Hi, > > The 1st patch introduces percpu_ref_resurge() for implementing > blk_mq_unfreeze_queue_no_drain_io(). > > The 2nd patch introdces blk_mq_unfreeze_queue_no_drain_io() for > cases in which queue can be unfreeze without draininig IO. > > The 3rd patch applies blk_mq_unfreeze_queue_no_drain_io() to > NVMe PCI timeout, so that IO hang may be avoided inside > nvme_reset_work() when new IO timeout is triggered. > > Part of idea is from Jianchao's early work: > > https://marc.info/?l=linux-kernel&m=153612052611020&w=2 > > Ming Lei (3): > lib/percpu-refcount: introduce percpu_ref_resurge() > blk-mq: introduce blk_mq_unfreeze_queue_no_drain_io > nvme: don't drain IO in nvme_reset_work() > > block/blk-mq.c | 25 ++++++++++++++-- > drivers/nvme/host/core.c | 12 +++++--- > drivers/nvme/host/nvme.h | 2 +- > drivers/nvme/host/pci.c | 3 +- > include/linux/blk-mq.h | 1 + > include/linux/percpu-refcount.h | 1 + > lib/percpu-refcount.c | 63 ++++++++++++++++++++++++++++++++++------- > 7 files changed, 87 insertions(+), 20 deletions(-) > > Cc: Tejun Heo <tj@xxxxxxxxxx> > Cc: Jianchao Wang <jianchao.w.wang@xxxxxxxxxx> > Cc: Kent Overstreet <kent.overstreet@xxxxxxxxx> > Cc: linux-block@xxxxxxxxxxxxxxx > Cc: Christoph Hellwig <hch@xxxxxx> > Cc: linux-nvme@xxxxxxxxxxxxxxxxxxx > Cc: Keith Busch <keith.busch@xxxxxxxxx> > Ooops, there is one extra patch missed. Please ignore this series. Thanks, Ming
