OpenCloudOS-Kernel/drivers/infiniband/core
Sagi Grimberg b7363e67b2 IB/device: Convert ib-comp-wq to be CPU-bound
This workqueue is used by our storage target mode ULPs
via the new CQ API. Recent observations when working
with very high-end flash storage devices reveal that
UNBOUND workqueue threads can migrate between cpu cores
and even numa nodes (although some numa locality is accounted
for).

While this attribute can be useful in some workloads,
it does not fit in very nicely with the normal
run-to-completion model we usually use in our target-mode
ULPs and the block-mq irq<->cpu affinity facilities.

The whole block-mq concept is that the completion will
land on the same cpu where the submission was performed.
The fact that our submitter thread is migrating cpus
can break this locality.

We assume that as a target mode ULP, we will serve multiple
initiators/clients and we can spread the load enough without
having to use unbound kworkers.

Also, while we're at it, expose this workqueue via sysfs which
is harmless and can be useful for debug.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>--
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-03-24 22:24:04 -04:00
..
Makefile IB/core: added support to use rdma cgroup controller 2017-01-10 11:14:27 -05:00
addr.c IB/core: Add missing check for addr_resolve callback return value 2016-11-16 20:03:44 -05:00
agent.c IB/core: Remove debug prints after allocation failure 2016-12-03 13:12:52 -05:00
agent.h IB/mad: Add final OPA MAD processing 2015-06-12 14:49:18 -04:00
cache.c IB/core: Add inline function to validate port 2017-01-27 14:33:59 -05:00
cgroup.c IB/core: added support to use rdma cgroup controller 2017-01-10 11:14:27 -05:00
cm.c IB/cma: Add debug messages to error flows 2017-01-24 16:20:37 -05:00
cm_msgs.h IB/core: Fix unaligned accesses 2015-05-05 13:21:27 -04:00
cma.c First set of updates for 4.11 kernel merge window 2017-02-23 08:27:57 -08:00
cma_configfs.c IB/cma: Add default RoCE TOS to CMA configfs 2017-02-15 09:51:28 -05:00
core_priv.h Merge branch 'for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup 2017-02-27 21:41:08 -08:00
cq.c IB/cq: Don't process more than the given budget 2017-03-24 22:19:48 -04:00
device.c IB/device: Convert ib-comp-wq to be CPU-bound 2017-03-24 22:24:04 -04:00
fmr_pool.c IB/core: Remove debug prints after allocation failure 2016-12-03 13:12:52 -05:00
iwcm.c rdma_cm: add rdma_reject_msg() helper function 2016-12-14 11:38:28 -05:00
iwcm.h iw_cm: free cm_id resources on the last deref 2016-08-02 13:15:18 -04:00
iwpm_msg.c IB/core: Remove debug prints after allocation failure 2016-12-03 13:12:52 -05:00
iwpm_util.c IB/core: Remove debug prints after allocation failure 2016-12-03 13:12:52 -05:00
iwpm_util.h iwpm: crash fix for large connections test 2016-03-16 13:48:32 -04:00
mad.c IB/mad: Add port_num to error message 2017-01-24 14:20:42 -05:00
mad_priv.h IB/mad: use CQ abstraction 2016-01-19 15:25:45 -05:00
mad_rmpp.c IB/mad: Add final OPA MAD processing 2015-06-12 14:49:18 -04:00
mad_rmpp.h
mr_pool.c IB/core: add a simple MR pool 2016-05-13 13:37:18 -04:00
multicast.c IB/multicast: Check ib_find_pkey() return value 2016-12-14 13:27:34 -05:00
netlink.c IB/core: Add flow control to the portmapper netlink calls 2016-08-02 13:14:27 -04:00
opa_smi.h IB: Add rdma_cap_ib_switch helper and use where appropriate 2015-07-14 13:20:08 -04:00
packer.c IB/core: trivial prink cleanup. 2016-03-03 10:20:25 -05:00
roce_gid_mgmt.c IB/core: Remove pointer casting from void to net_device 2017-02-15 09:51:28 -05:00
rw.c IB/core, RDMA RW API: Do not exceed QP SGE send limit 2016-08-02 12:02:41 -04:00
sa.h
sa_query.c IB/sa : Remove deprecated create_singlethread_workqueue 2016-10-07 16:54:22 -04:00
smi.c IB: Add rdma_cap_ib_switch helper and use where appropriate 2015-07-14 13:20:08 -04:00
smi.h IB: Add rdma_cap_ib_switch helper and use where appropriate 2015-07-14 13:20:08 -04:00
sysfs.c IB/core: Initialize ib_device.dev.parent earlier 2017-01-24 12:23:35 -05:00
ucm.c IB/core: Use dev.parent instead of dma_device 2017-01-24 12:23:35 -05:00
ucma.c infiniband: remove WARN that is not kernel bug 2016-12-03 13:17:07 -05:00
ud_header.c IB/core: trivial prink cleanup. 2016-03-03 10:20:25 -05:00
umem.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
umem_odp.c sched/headers: Prepare to move the get_task_struct()/put_task_struct() and related APIs from <linux/sched.h> to <linux/sched/task.h> 2017-03-02 08:42:40 +01:00
umem_rbtree.c IB/umem: Update on demand page (ODP) support 2017-02-14 11:41:17 -05:00
user_mad.c IB/core: Use dev.parent instead of dma_device 2017-01-24 12:23:35 -05:00
uverbs.h IB/uverbs: Add support for flow tag 2017-02-14 10:21:01 -05:00
uverbs_cmd.c Merge branch 'for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup 2017-02-27 21:41:08 -08:00
uverbs_main.c Merge branch 'for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup 2017-02-27 21:41:08 -08:00
uverbs_marshall.c IB/core: Add gid_type to gid attribute 2015-12-23 10:35:10 -05:00
verbs.c IB/core: Add support for draining IB_POLL_DIRECT completion queues 2017-02-19 09:51:55 -05:00