linux/drivers/infiniband/ulp
Jack Wang 03ed5a8cda RDMA/rtrs: remove WQ_MEM_RECLAIM for rtrs_wq
lockdep triggers a warning from time to time when running a regression
test:

 rnbd_client L685: </dev/nullb0@bla> Device disconnected.
 rnbd_client L1756: Unloading module

 workqueue: WQ_MEM_RECLAIM rtrs_client_wq:rtrs_clt_reconnect_work [rtrs_client] is flushing !WQ_MEM_RECLAIM ib_addr:process_one_req [ib_core]
 WARNING: CPU: 2 PID: 18824 at kernel/workqueue.c:2517 check_flush_dependency+0xad/0x130

The root cause is workqueue core expect flushing should not be done for a
!WQ_MEM_RECLAIM wq from a WQ_MEM_RECLAIM workqueue.

In above case ib_addr workqueue without WQ_MEM_RECLAIM, but rtrs_wq
WQ_MEM_RECLAIM.

To avoid the warning, remove the WQ_MEM_RECLAIM flag.

Fixes: 9cb8374804 ("RDMA/rtrs: server: main functionality")
Fixes: 6a98d71dae ("RDMA/rtrs: client: main functionality")
Link: https://lore.kernel.org/r/20200724111508.15734-4-haris.iqbal@cloud.ionos.com
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2020-07-29 14:26:53 -03:00
..
ipoib Merge branch 'mlx5_ipoib_qpn' into rdma.git for-next 2020-07-06 14:29:58 -03:00
iser IB/iser: use new shared CQ mechanism 2020-07-29 09:10:31 -03:00
isert IB/isert: use new shared CQ mechanism 2020-07-29 09:10:31 -03:00
opa_vnic RDMA: Correct trivial kernel-doc inconsistencies 2020-06-22 11:57:39 -03:00
rtrs RDMA/rtrs: remove WQ_MEM_RECLAIM for rtrs_wq 2020-07-29 14:26:53 -03:00
srp treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
srpt IB/srpt: use new shared CQ mechanism 2020-07-29 09:10:32 -03:00
Makefile RDMA/rtrs: include client and server modules into kernel compilation 2020-05-17 18:57:15 -03:00