Spdk/examples/nvme
Jim Harris 345bb2e89d nvme/identify: submit only one GET_FEATURE at a time
This is a workaround for issue #1799 that would require
a fix from Google Cloud Platform.  GCP NVMe SSDs do
not support overlapped GET_FEATURE commands - the
cdw0 value on completions get mixed up.

On GCP the result is that identify app reports only
1 SQ/CQ supported when in fact it supports 16.

We can easily workaround this in the identify app by
submitting one GET_FEATURE and then polling for its
completion before submitting the next one.

We may consider reverting this in the future should GCP
provide a fix, but there is really no harm in keeping
this patch long term since this isn't an I/O path issue.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I536033677a8364c955d562226e3feba4dbad0e07

Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/6454
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Community-CI: Mellanox Build Bot
2021-02-19 11:33:21 +00:00
..
abort examples: use "main" instead of "master" 2020-12-03 09:41:07 +00:00
arbitration examples: use "main" instead of "master" 2020-12-03 09:41:07 +00:00
cmb_copy nvme/cmb_copy: disable submission queue in CMB 2020-04-22 09:18:22 +00:00
fio_plugin nvme/fio_plugin: add print_qid_mappings option 2021-02-19 11:33:21 +00:00
hello_world examples/nvme/hello_world: call exit() on read error 2020-10-23 13:47:09 +00:00
hotplug build: fix duplicate spdk.common.mk includes 2019-05-22 14:51:01 +00:00
identify nvme/identify: submit only one GET_FEATURE at a time 2021-02-19 11:33:21 +00:00
nvme_manage examples: Use PRId64 for portability 2020-11-20 11:01:11 +00:00
perf nvme/perf: Add missing key (ns) of Transport ID in perf help 2021-02-04 08:39:51 +00:00
reconnect NVMe/vfio-user: add initial version vfio-user transport to NVMe driver 2021-01-21 05:00:18 +00:00
Makefile example/nvme: add application to test NVMe I/O abort 2020-07-17 07:21:13 +00:00