AuxXxilium/linux_dsm_epyc7002
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6b57cea922
linux_dsm_epyc7002/drivers/infiniband/core
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Parav Pandit 6b57cea922 IB/core: Let IB core distribute cache update events 
Currently when the low level driver notifies Pkey, GID, and port change
events they are notified to the registered handlers in the order they are
registered.

IB core and other ULPs such as IPoIB are interested in GID, LID, Pkey
change events.

Since all GID queries done by ULPs are serviced by IB core, and the IB
core deferes cache updates to a work queue, it is possible for other
clients to see stale cache data when they handle their own events.

For example, the below call tree shows how ipoib will call
rdma_query_gid() concurrently with the update to the cache sitting in the
WQ.

mlx5_ib_handle_event()
  ib_dispatch_event()
    ib_cache_event()
       queue_work() -> slow cache update

    [..]
    ipoib_event()
     queue_work()
       [..]
       work handler
         ipoib_ib_dev_flush_light()
           __ipoib_ib_dev_flush()
              ipoib_dev_addr_changed_valid()
                rdma_query_gid() <- Returns old GID, cache not updated.

Move all the event dispatch to a work queue so that the cache update is
always done before any clients are notified.

Fixes: f35faa4ba9 ("IB/core: Simplify ib_query_gid to always refer to cache")
Link: https://lore.kernel.org/r/20191212113024.336702-3-leon@kernel.org
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2020-01-07 20:18:10 -04:00
..
addr.c RDMA/netlink: Do not always generate an ACK for some netlink operations 2020-01-03 16:02:32 -04:00
agent.c RDMA: Mark if destroy address handle is in a sleepable context 2018-12-19 16:28:03 -07:00
agent.h
cache.c IB/core: Let IB core distribute cache update events 2020-01-07 20:18:10 -04:00
cgroup.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
cm_msgs.h RDMA/cm: Delete unused CM LAP functions 2020-01-03 21:06:21 -04:00
cm.c RDMA/cm: Delete unused CM ARP functions 2020-01-03 21:07:21 -04:00
cma_configfs.c RDMA/core: Annotate destroy of mutex to ensure that it is released as unlocked 2019-07-25 12:07:14 -03:00
cma_priv.h IB/cma: Define option to set ack timeout and pack tos_set 2019-02-08 16:14:21 -07:00
cma_trace.c RDMA/cma: Add trace points in RDMA Connection Manager 2020-01-07 16:10:53 -04:00
cma_trace.h RDMA/cma: Add trace points in RDMA Connection Manager 2020-01-07 16:10:53 -04:00
cma.c RDMA/cma: Add trace points in RDMA Connection Manager 2020-01-07 16:10:53 -04:00
core_priv.h IB/core: Let IB core distribute cache update events 2020-01-07 20:18:10 -04:00
counters.c RDMA/counter: Prevent auto-binding a QP which are not tracked with res 2019-12-12 15:38:15 -05:00
cq.c RDMA/core: Trace points for diagnosing completion queue issues 2020-01-07 16:10:53 -04:00
device.c IB/core: Let IB core distribute cache update events 2020-01-07 20:18:10 -04:00
fmr_pool.c RDMA: Delete DEBUG code 2019-08-20 13:27:53 -04:00
ib_core_uverbs.c IB/core: Introduce rdma_user_mmap_entry_insert_range() API 2019-12-12 16:55:36 -05:00
iwcm.c RDMA/iwcm: move iw_rem_ref() calls out of spinlock 2019-10-18 14:40:01 -04:00
iwcm.h
iwpm_msg.c RDMA/iwpm: Delete unnecessary checks before the macro call "dev_kfree_skb" 2019-08-27 13:09:23 -03:00
iwpm_util.c RDMA/iwpm: Delete unnecessary checks before the macro call "dev_kfree_skb" 2019-08-27 13:09:23 -03:00
iwpm_util.h infiniband: fix core/ipwm_util.h kernel-doc warnings 2019-10-22 14:45:31 -03:00
mad_priv.h RDMA: Use __packed annotation instead of __attribute__ ((packed)) 2019-03-25 21:14:12 -03:00
mad_rmpp.c RDMA: Mark if destroy address handle is in a sleepable context 2018-12-19 16:28:03 -07:00
mad_rmpp.h
mad.c RDMA: Change MAD processing function to remove extra casting and parameter 2019-11-12 20:20:15 -04:00
Makefile RDMA/core: Trace points for diagnosing completion queue issues 2020-01-07 16:10:53 -04:00
mr_pool.c Linux 5.2-rc6 2019-06-28 21:18:23 -03:00
multicast.c IB/core, ipoib: Do not overreact to SM LID change event 2019-05-07 16:06:03 -03:00
netlink.c IB/core: Avoid deadlock during netlink message handling 2019-10-24 20:49:37 -03:00
nldev.c RDMA subsystem updates for 5.5 2019-11-27 10:17:28 -08:00
opa_smi.h RDMA: Start use ib_device_ops 2018-12-12 07:40:16 -07:00
packer.c
rdma_core.c RDMA/core: Create mmap database and cookie helper functions 2019-11-06 13:08:00 -04:00
rdma_core.h RDMA/core: Clear out the udata before error unwind 2019-05-27 14:35:26 -03:00
restrack.c RDMA/restrack: Remove PID namespace support 2019-10-23 15:58:31 -03:00
restrack.h RDMA/restrack: Remove PID namespace support 2019-10-23 15:58:31 -03:00
roce_gid_mgmt.c drivers: use in_dev_for_each_ifa_rtnl/rcu 2019-06-02 18:06:26 -07:00
rw.c RDMA/rw: Support threshold for registration vs scattering to local pages 2019-10-22 14:26:52 -03:00
sa_query.c RDMA/netlink: Do not always generate an ACK for some netlink operations 2020-01-03 16:02:32 -04:00
sa.h RDMA/core: Annotate timeout as unsigned long 2018-10-16 13:34:01 -04:00
security.c IB/core: Fix wrong iterating on ports 2019-10-04 15:50:27 -03:00
smi.c
smi.h RDMA: Start use ib_device_ops 2018-12-12 07:40:16 -07:00
sysfs.c RDMA: Change MAD processing function to remove extra casting and parameter 2019-11-12 20:20:15 -04:00
trace.c RDMA/core: Trace points for diagnosing completion queue issues 2020-01-07 16:10:53 -04:00
ucma.c RDMA: Report available cdevs through RDMA_NLDEV_CMD_GET_CHARDEV 2019-06-18 22:44:08 -04:00
ud_header.c
umem_odp.c IB/core: Fix ODP with IB_ACCESS_HUGETLB handling 2020-01-03 17:00:14 -04:00
umem.c IB/umem: remove the dmasync argument to ib_umem_get 2019-11-17 10:37:00 -04:00
user_mad.c Merge branch 'odp_fixes' into rdma.git for-next 2019-08-21 14:10:36 -03:00
uverbs_cmd.c RDMA/core: Create mmap database and cookie helper functions 2019-11-06 13:08:00 -04:00
uverbs_ioctl.c RDMA/uverbs: Add a check for uverbs_attr_get to uverbs_copy_to_struct_or_zero 2019-10-22 16:10:03 -03:00
uverbs_main.c compat_ioctl: remove most of fs/compat_ioctl.c 2019-12-01 13:46:15 -08:00
uverbs_marshall.c IB/cm: Replace members of sa_path_rec with 'struct sgid_attr *' 2018-06-25 14:19:57 -06:00
uverbs_std_types_counters.c IB: When attrs.udata/ufile is available use that instead of uobject 2019-04-08 13:05:25 -03:00
uverbs_std_types_cq.c Linux 5.2-rc6 2019-06-28 21:18:23 -03:00
uverbs_std_types_device.c IB/uverbs: Fix ioctl query port to consider device disassociation 2019-01-25 11:58:06 -07:00
uverbs_std_types_dm.c IB: When attrs.udata/ufile is available use that instead of uobject 2019-04-08 13:05:25 -03:00
uverbs_std_types_flow_action.c IB: When attrs.udata/ufile is available use that instead of uobject 2019-04-08 13:05:25 -03:00
uverbs_std_types_mr.c Linux 5.2-rc6 2019-06-28 21:18:23 -03:00
uverbs_std_types.c IB: Remove 'uobject->context' dependency in object destroy APIs 2019-04-01 14:59:35 -03:00
uverbs_uapi.c RDMA: Move driver_id into struct ib_device_ops 2019-06-10 16:56:02 -03:00
uverbs.h RDMA/uverbs: Prevent potential underflow 2019-10-22 15:05:36 -03:00
verbs.c RDMA/core: Add trace points to follow MR allocation 2020-01-07 16:10:53 -04:00