On Wed, Feb 14, 2018 at 11:20:39AM -0500, Chuck Lever wrote: > > > > On Feb 14, 2018, at 11:00 AM, Kalderon, Michal <Michal.Kalderon@xxxxxxxxxx> wrote: > > > > Hi Leon, Chuck, > > > > We ran nfs mount over qedr using 4.16-rc1 > > When unloading qedr we get a WARNING from the resource tracker ( pasted below) > > > > Can you please advise on the best way to debug this? How can we get more info on the resource not being freed? > > I haven't seen this kind of report before, so I can't directly answer > your questions. But can you tell us more about reproducing it: It is resource tracking which was entered in last merge window. > > - Is there a workload running on the NFS mount point when the module > is unloaded? > > - Is the issue 100% reproducible, or intermittent? > > - Have you tried bisecting? It will be one of three patches: 9d5f8c209b3f RDMA/core: Add resource tracking for create and destroy PDs 08f294a1524b RDMA/core: Add resource tracking for create and destroy CQs 78a0cd648a80 RDMA/core: Add resource tracking for create and destroy QPs > > - iWARP, RoCE, or both? > > - Have you tried reproducing with a different model of device? I doubt that it is related to device, it looks like a resource leak while removing rpcrdma. We definitely need to add more information to this warning to understand which one of three available resources wasn't freed. > > > > Thanks, > > Michal > > > > GAD17990 login: [ 300.480137] ib_srpt srpt_remove_one(qedr0): nothing to do. > > [ 300.515527] ib_srpt srpt_remove_one(qedr1): nothing to do. > > [ 300.542182] rpcrdma: removing device qedr1 for 192.168.110.146:20049 > > [ 300.573789] WARNING: CPU: 12 PID: 3545 at drivers/infiniband/core/restrack.c:20 rdma_restrack_clean+0x25/0x30 [ib_core] > > [ 300.625985] Modules linked in: rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache rpcrdma ib_isert iscsi_target_mod ib_iser libiscsi scsi_transport_iscsi ib_srpt target_core_mod ib_srp scsi_transport_srp ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm 8021q garp mrp qedr(-) ib_core xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 tun bridge stp llc ebtable_filter ebtables fuse ip6table_filter ip6_tables iptable_filter dm_mirror dm_region_hash dm_log dm_mod vfat fat dax intel_rapl sb_edac x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc aesni_intel crypto_simd glue_helper cryptd ipmi_si > > [ 300.972993] iTCO_wdt ipmi_devintf sg pcspkr iTCO_vendor_support hpwdt hpilo lpc_ich ipmi_msghandler pcc_cpufreq ioatdma i2c_i801 mfd_core wmi shpchp dca acpi_power_meter i2c_core nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs libcrc32c sd_mod qede qed crc32c_intel tg3 hpsa scsi_transport_sas crc8 > > [ 301.109036] CPU: 12 PID: 3545 Comm: rmmod Not tainted 4.16.0-rc1 #1 > > [ 301.139518] Hardware name: HP ProLiant DL380 Gen9/ProLiant DL380 Gen9, BIOS P89 02/17/2017 > > [ 301.180411] RIP: 0010:rdma_restrack_clean+0x25/0x30 [ib_core] > > [ 301.208350] RSP: 0018:ffffb1820478fe88 EFLAGS: 00010286 > > [ 301.233241] RAX: 0000000000000000 RBX: ffffa099ed1b4070 RCX: ffffdf02a193c800 > > [ 301.268001] RDX: ffffa095ed12d7a0 RSI: 0000000000025900 RDI: ffffa099ed1b47d0 > > [ 301.302530] RBP: ffffa099ed1b4070 R08: ffffa095de9dd000 R09: 0000000180080007 > > [ 301.337245] R10: 0000000000000001 R11: ffffa095de9dd000 R12: ffffa099ed1b4000 > > [ 301.372151] R13: ffffa099ed1b405c R14: 0000000000e231c0 R15: 0000000000e23010 > > [ 301.407384] FS: 00007f2b0c854740(0000) GS:ffffa099ff700000(0000) knlGS:0000000000000000 > > [ 301.447026] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > [ 301.475409] CR2: 0000000000e2caf8 CR3: 0000000865c0d006 CR4: 00000000001606e0 > > [ 301.510892] Call Trace: > > [ 301.522715] ib_unregister_device+0xf5/0x190 [ib_core] > > [ 301.547966] qedr_remove+0x37/0x60 [qedr] > > [ 301.568393] qede_rdma_unregister_driver+0x4b/0x90 [qede] > > [ 301.594980] SyS_delete_module+0x168/0x240 > > [ 301.615057] do_syscall_64+0x6f/0x1a0 > > [ 301.633588] entry_SYSCALL_64_after_hwframe+0x21/0x86 > > [ 301.658657] RIP: 0033:0x7f2b0bd33707 > > [ 301.676005] RSP: 002b:00007ffdefa29d98 EFLAGS: 00000202 ORIG_RAX: 00000000000000b0 > > [ 301.713324] RAX: ffffffffffffffda RBX: 0000000000e231c0 RCX: 00007f2b0bd33707 > > [ 301.748186] RDX: 00007f2b0bda3a80 RSI: 0000000000000800 RDI: 0000000000e23228 > > [ 301.782960] RBP: 0000000000000000 R08: 00007f2b0bff8060 R09: 00007f2b0bda3a80 > > [ 301.818142] R10: 00007ffdefa29b20 R11: 0000000000000202 R12: 00007ffdefa2b70d > > [ 301.853290] R13: 0000000000000000 R14: 0000000000e231c0 R15: 0000000000e23010 > > [ 301.888138] Code: 84 00 00 00 00 00 0f 1f 44 00 00 48 83 c7 28 31 c0 eb 0c 48 83 c0 08 48 3d 00 08 00 00 74 0f 48 8d 14 07 48 8b 12 48 85 d2 74 e8 <0f> ff c3 f3 c3 66 0f 1f 44 00 00 0f 1f 44 00 00 53 48 8b 47 28 > > [ 301.981140] ---[ end trace 28dec8f15205789a ]--- > > -- > Chuck Lever > > >
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