Messages in this thread | | | Subject | Re: [PATCH 7/8] nvme: use blk_mq_queue_tag_busy_iter | From | James Smart <> | Date | Fri, 15 Mar 2019 09:39:45 -0700 |
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On 3/15/2019 9:33 AM, James Smart wrote: > On 3/15/2019 1:57 AM, Jianchao Wang wrote: >> blk_mq_tagset_busy_iter is not safe that it could get stale request >> in tags->rqs[]. Use blk_mq_queue_tag_busy_iter here. A new helper >> interface nvme_iterate_inflight_rqs is introduced to iterate >> all of the ns under a ctrl. >> >> Signed-off-by: Jianchao Wang <jianchao.w.wang@oracle.com> >> --- >> drivers/nvme/host/core.c | 12 ++++++++++++ >> drivers/nvme/host/fc.c | 12 ++++++------ >> drivers/nvme/host/nvme.h | 2 ++ >> drivers/nvme/host/pci.c | 5 +++-- >> drivers/nvme/host/rdma.c | 6 +++--- >> drivers/nvme/host/tcp.c | 5 +++-- >> drivers/nvme/target/loop.c | 6 +++--- >> 7 files changed, 32 insertions(+), 16 deletions(-) >> >> diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c >> index 6a9dd68..5760fad 100644 >> --- a/drivers/nvme/host/core.c >> +++ b/drivers/nvme/host/core.c >> @@ -3816,6 +3816,18 @@ void nvme_start_queues(struct nvme_ctrl *ctrl) >> } >> EXPORT_SYMBOL_GPL(nvme_start_queues); >> +void nvme_iterate_inflight_rqs(struct nvme_ctrl *ctrl, >> + busy_iter_fn *fn, void *data) >> +{ >> + struct nvme_ns *ns; >> + >> + down_read(&ctrl->namespaces_rwsem); >> + list_for_each_entry(ns, &ctrl->namespaces, list) >> + blk_mq_queue_tag_busy_iter(ns->queue, fn, data, true); >> + up_read(&ctrl->namespaces_rwsem); >> +} >> +EXPORT_SYMBOL_GPL(nvme_iterate_inflight_rqs); > > Hmm... so this aborts ios for namespaces. How about ios that aren't > for a namespace but rather for the controller itself. For example, > anything on the admin queue ? Rather critical for those ios be > terminated as well. NVM - didn't look at which tag set. but it does highlight - doesn't cover anything issued by core/transport on the io queues.
-- james
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