AuxXxilium/linux_dsm_epyc7002
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c66f67414c
linux_dsm_epyc7002/drivers/infiniband/core
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Daniel Jurgens c66f67414c IB/core: Don't register each MAD agent for LSM notifier 
When creating many MAD agents in a short period of time, receive packet
processing can be delayed long enough to cause timeouts while new agents
are being added to the atomic notifier chain with IRQs disabled.  Notifier
chain registration and unregstration is an O(n) operation. With large
numbers of MAD agents being created and destroyed simultaneously the CPUs
spend too much time with interrupts disabled.

Instead of each MAD agent registering for it's own LSM notification,
maintain a list of agents internally and register once, this registration
already existed for handling the PKeys. This list is write mostly, so a
normal spin lock is used vs a read/write lock. All MAD agents must be
checked, so a single list is used instead of breaking them down per
device.

Notifier calls are done under rcu_read_lock, so there isn't a risk of
similar packet timeouts while checking the MAD agents security settings
when notified.

Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08 16:24:44 -07:00
..
addr.c RDMA/core: Annotate timeout as unsigned long 2018-10-16 13:34:01 -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 IB/mad: Add final OPA MAD processing 2015-06-12 14:49:18 -04:00
cache.c RDMA/core: Delete RoCE GID in hw when corresponding IP is deleted 2018-12-18 14:16:44 -07:00
cgroup.c IB/core: Simplify rdma cgroup registration 2019-01-18 13:43:10 -07:00
cm_msgs.h IB/cm: Remove unused and erroneous msg sequence encoding 2018-07-09 11:39:28 -06:00
cm.c IB/cm: Use struct_size() in kmalloc() 2019-01-07 11:43:03 -07:00
cma_configfs.c RDMA/cma: Move cma module specific functions to cma_priv.h 2018-11-22 11:57:33 -07:00
cma_priv.h IB/cma: Define option to set ack timeout and pack tos_set 2019-02-08 16:14:21 -07:00
cma.c RDMA/iwcm: add tos_set bool to iw_cm struct 2019-02-08 16:18:06 -07:00
core_priv.h IB/core: Don't register each MAD agent for LSM notifier 2019-02-08 16:24:44 -07:00
cq.c RDMA/restrack: Resource-tracker should not use uobject pointers 2018-12-18 15:38:26 -07:00
device.c IB/core: Don't register each MAD agent for LSM notifier 2019-02-08 16:24:44 -07:00
fmr_pool.c RDMA: Start use ib_device_ops 2018-12-12 07:40:16 -07:00
iwcm.c RDMA/IWPM: Support no port mapping requirements 2019-02-04 16:26:02 -07:00
iwcm.h iw_cm: free cm_id resources on the last deref 2016-08-02 13:15:18 -04:00
iwpm_msg.c RDMA/iwpm: move kdoc comments to functions 2019-02-05 15:40:41 -07:00
iwpm_util.c RDMA/iwpm: move kdoc comments to functions 2019-02-05 15:40:41 -07:00
iwpm_util.h RDMA/IWPM: Support no port mapping requirements 2019-02-04 16:26:02 -07:00
mad_priv.h RDMA/core: Annotate timeout as unsigned long 2018-10-16 13:34:01 -04:00
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: Start use ib_device_ops 2018-12-12 07:40:16 -07:00
Makefile IB/{core,uverbs}: Move ib_umem_xxx functions from ib_core to ib_uverbs 2019-01-10 17:06:44 -07:00
mr_pool.c IB/core: add a simple MR pool 2016-05-13 13:37:18 -04:00
multicast.c IB: Make ib_init_ah_from_mcmember set sgid_attr 2018-06-25 14:19:56 -06:00
netlink.c RDMA/cma: Remove CM_ID statistics provided by rdma-cm module 2019-02-05 15:30:33 -07:00
nldev.c Linux 5.0-rc5 2019-02-04 14:53:42 -07:00
opa_smi.h RDMA: Start use ib_device_ops 2018-12-12 07:40:16 -07:00
packer.c IB/core: trivial prink cleanup. 2016-03-03 10:20:25 -05:00
rdma_core.c IB/mlx5: Introduce MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD 2019-01-29 13:32:43 -07:00
rdma_core.h RDMA/uverbs: Mark ioctl responses with UVERBS_ATTR_F_VALID_OUTPUT 2019-01-14 14:02:22 -07:00
restrack.c RDMA/core: Use the ops infrastructure to keep all callbacks in one place 2019-01-30 21:34:21 -07:00
roce_gid_mgmt.c IB/core: Fix oops in netdev_next_upper_dev_rcu() 2018-12-12 12:14:49 -05:00
rw.c IB/core: Remove ib_sg_dma_address() and ib_sg_dma_len() 2019-02-04 14:34:07 -07:00
sa_query.c IB/core: Use struct_size() in kzalloc() 2019-01-07 11:59:33 -07:00
sa.h RDMA/core: Annotate timeout as unsigned long 2018-10-16 13:34:01 -04:00
security.c IB/core: Don't register each MAD agent for LSM notifier 2019-02-08 16:24:44 -07:00
smi.c IB: Add rdma_cap_ib_switch helper and use where appropriate 2015-07-14 13:20:08 -04:00
smi.h RDMA: Start use ib_device_ops 2018-12-12 07:40:16 -07:00
sysfs.c RDMA: Introduce and use rdma_device_to_ibdev() 2019-01-14 13:12:03 -07:00
ucm.c RDMA: Start use ib_device_ops 2018-12-12 07:40:16 -07:00
ucma.c IB/cma: Define option to set ack timeout and pack tos_set 2019-02-08 16:14:21 -07:00
ud_header.c IB/core: trivial prink cleanup. 2016-03-03 10:20:25 -05:00
umem_odp.c Linux 5.0-rc5 2019-02-04 14:53:42 -07:00
umem.c drivers/IB,core: reduce scope of mmap_sem 2019-02-07 12:54:02 -07:00
user_mad.c IB/umad: Do not check status of nonseekable_open() 2019-01-24 09:22:29 -07:00
uverbs_cmd.c Linux 5.0-rc5 2019-02-04 14:53:42 -07:00
uverbs_ioctl.c RDMA/uverbs: Mark ioctl responses with UVERBS_ATTR_F_VALID_OUTPUT 2019-01-14 14:02:22 -07:00
uverbs_main.c Linux 5.0-rc5 2019-02-04 14:53:42 -07:00
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 RDMA: Start use ib_device_ops 2018-12-12 07:40:16 -07:00
uverbs_std_types_cq.c RDMA/restrack: Resource-tracker should not use uobject pointers 2018-12-18 15:38:26 -07:00
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 RDMA: Start use ib_device_ops 2018-12-12 07:40:16 -07:00
uverbs_std_types_flow_action.c RDMA: Start use ib_device_ops 2018-12-12 07:40:16 -07:00
uverbs_std_types_mr.c IB/uverbs: Signedness bug in UVERBS_HANDLER() 2018-12-22 16:07:13 -07:00
uverbs_std_types.c RDMA: Mark if destroy address handle is in a sleepable context 2018-12-19 16:28:03 -07:00
uverbs_uapi.c IB/mlx5: Introduce MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD 2019-01-29 13:32:43 -07:00
uverbs.h IB/core: Move query port to ioctl 2018-12-20 15:18:24 -07:00
verbs.c IB/core: Destroy QP if XRC QP fails 2019-01-24 09:22:30 -07:00