This set improves the quiesce time when using a large set of namespaces, which also improves I/O failover time in a multipath environment. We improve for both non-blocking hctxs and blocking hctxs introducing blk_mq_[un]quiesce_tagset which works on all request queues over a given tagset in parallel (which is the case in nvme) for both tagset types (blocking and non-blocking); Changes from v4: - introduce blk_mq_[un]quiesce_tagset as one interface - move nvme core to use this interface Changes from v3: - make hctx->rcu_sync dynamically allocated from the heap instead of a static member function Changes from v2: - made blk_mq_quiesce_queue_async operate on both blocking and non-blocking hctxs. - removed separation between blocking vs. non-blocking queues - dropeed patch from Chao - dropped nvme-rdma test patch Changes from v1: - trivial typo fixes *** SUBJECT HERE *** *** BLURB HERE *** Sagi Grimberg (2): blk-mq: add tagset quiesce interface nvme: use blk_mq_[un]quiesce_tagset block/blk-mq.c | 66 ++++++++++++++++++++++++++++++++++++++++ drivers/nvme/host/core.c | 14 ++------- include/linux/blk-mq.h | 4 +++ 3 files changed, 72 insertions(+), 12 deletions(-) -- 2.25.1
