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96d9cbe2f2
Add timeout to cm_destroy_id, so that userspace can trigger any data collection that would help in analyzing the cause of delay in destroying the cm_id. New noinline function helps dtrace/ebpf programs to hook on to it. Existing functionality isn't changed except triggering a probe-able new function at every timeout interval. We have seen cases where CM messages stuck with MAD layer (either due to software bug or faulty HCA), leading to cm_id getting stuck in the following call stack. This patch helps in resolving such issues faster. kernel: ... INFO: task XXXX:56778 blocked for more than 120 seconds. ... Call Trace: __schedule+0x2bc/0x895 schedule+0x36/0x7c schedule_timeout+0x1f6/0x31f ? __slab_free+0x19c/0x2ba wait_for_completion+0x12b/0x18a ? wake_up_q+0x80/0x73 cm_destroy_id+0x345/0x610 [ib_cm] ib_destroy_cm_id+0x10/0x20 [ib_cm] rdma_destroy_id+0xa8/0x300 [rdma_cm] ucma_destroy_id+0x13e/0x190 [rdma_ucm] ucma_write+0xe0/0x160 [rdma_ucm] __vfs_write+0x3a/0x16d vfs_write+0xb2/0x1a1 ? syscall_trace_enter+0x1ce/0x2b8 SyS_write+0x5c/0xd3 do_syscall_64+0x79/0x1b9 entry_SYSCALL_64_after_hwframe+0x16d/0x0 Signed-off-by: Manjunath Patil <manjunath.b.patil@oracle.com> Link: https://lore.kernel.org/r/20240309063323.458102-1-manjunath.b.patil@oracle.com Signed-off-by: Leon Romanovsky <leon@kernel.org> |
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| .. | ||
| addr.c | ||
| agent.c | ||
| agent.h | ||
| cache.c | ||
| cgroup.c | ||
| cm.c | ||
| cm_msgs.h | ||
| cm_trace.c | ||
| cm_trace.h | ||
| cma.c | ||
| cma_configfs.c | ||
| cma_priv.h | ||
| cma_trace.c | ||
| cma_trace.h | ||
| core_priv.h | ||
| counters.c | ||
| cq.c | ||
| device.c | ||
| ib_core_uverbs.c | ||
| iwcm.c | ||
| iwcm.h | ||
| iwpm_msg.c | ||
| iwpm_util.c | ||
| iwpm_util.h | ||
| lag.c | ||
| mad.c | ||
| mad_priv.h | ||
| mad_rmpp.c | ||
| mad_rmpp.h | ||
| Makefile | ||
| mr_pool.c | ||
| multicast.c | ||
| netlink.c | ||
| nldev.c | ||
| opa_smi.h | ||
| packer.c | ||
| rdma_core.c | ||
| rdma_core.h | ||
| restrack.c | ||
| restrack.h | ||
| roce_gid_mgmt.c | ||
| rw.c | ||
| sa.h | ||
| sa_query.c | ||
| security.c | ||
| smi.c | ||
| smi.h | ||
| sysfs.c | ||
| trace.c | ||
| ucma.c | ||
| ud_header.c | ||
| umem.c | ||
| umem_dmabuf.c | ||
| umem_odp.c | ||
| user_mad.c | ||
| uverbs.h | ||
| uverbs_cmd.c | ||
| uverbs_ioctl.c | ||
| uverbs_main.c | ||
| uverbs_marshall.c | ||
| uverbs_std_types.c | ||
| uverbs_std_types_async_fd.c | ||
| uverbs_std_types_counters.c | ||
| uverbs_std_types_cq.c | ||
| uverbs_std_types_device.c | ||
| uverbs_std_types_dm.c | ||
| uverbs_std_types_flow_action.c | ||
| uverbs_std_types_mr.c | ||
| uverbs_std_types_qp.c | ||
| uverbs_std_types_srq.c | ||
| uverbs_std_types_wq.c | ||
| uverbs_uapi.c | ||
| verbs.c | ||