On Wednesday, February 18, 2015 11:36:06 AM Benjamin Coddington wrote: > While playing with callback channel failures, I ran into this on the > server yesterday: > > [ 372.020003] NMI watchdog: BUG: soft lockup - CPU#1 stuck for 22s! > [kworker/u4:0:6] [ 372.020003] Modules linked in: cts rpcsec_gss_krb5 > nfnetlink_queue nfnetlink_log nfnetlink nf_conntrack_netbios_ns > nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT xt_conntrack ebtable_nat > ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat > nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle > ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat > nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack > iptable_mangle iptable_security iptable_raw ppdev crct10dif_pclmul > crc32_pclmul crc32c_intel ghash_clmulni_intel serio_raw virtio_console > virtio_balloon parport_pc pvpanic parport i2c_piix4 nfsd auth_rpcgss > nfs_acl lockd sunrpc virtio_net virtio_blk cirrus drm_kms_helper ttm drm > virtio_pci virtio_ring virtio ata_generic pata_acpi [ 372.020003] CPU: 1 > PID: 6 Comm: kworker/u4:0 Not tainted 3.17.4-301.fc21.x86_64 #1 > [ 372.020003] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS > 1.7.5-20140709_153950- 04/01/2014 [ 372.020003] Workqueue: nfsd4 > laundromat_main [nfsd] > [ 372.020003] task: ffff88007c7bb110 ti: ffff88007c04c000 task.ti: > ffff88007c04c000 [ 372.020003] RIP: > 0010:[<ffffffff81746162>] [<ffffffff81746162>] > _raw_spin_unlock_irqrestore+0x12/0x20 [ 372.020003] RSP: > 0018:ffff88007c04fcd8 EFLAGS: 00000246 > [ 372.020003] RAX: ffffffffa01876f0 RBX: 0000000000000000 RCX: > 0000000000000000 [ 372.020003] RDX: ffffffffa0187708 RSI: 0000000000000246 > RDI: 0000000000000246 [ 372.020003] RBP: ffff88007c04fcd8 R08: > 0000000000000000 R09: 0000000000017a40 [ 372.020003] R10: ffffffffa017b4ed > R11: 00000000000003a5 R12: ffffffffa01815ba [ 372.020003] R13: > ffff88007c04fc98 R14: ffffffff81f0cc80 R15: 0000000000000000 [ 372.020003] > FS: 0000000000000000(0000) GS:ffff88007fd00000(0000) > knlGS:0000000000000000 [ 372.020003] CS: 0010 DS: 0000 ES: 0000 CR0: > 0000000080050033 > [ 372.020003] CR2: 00007fccadbe03b8 CR3: 000000007b89e000 CR4: > 00000000000406e0 [ 372.020003] Stack: > [ 372.020003] ffff88007c04fd10 ffffffff810d6ac4 ffff88007c04fcf8 > ffff88007c04fd38 [ 372.020003] ffffffffa016f69d ffff88007a21a878 > ffff88007a21a888 ffff88007c04fd38 [ 372.020003] ffffffffa016f69d > ffff88007c04fd48 ffff88007a21a800 ffff88007c04fcf8 [ 372.020003] Call > Trace: > [ 372.020003] [<ffffffff810d6ac4>] __wake_up+0x44/0x50 > [ 372.020003] [<ffffffffa016f69d>] ? nfs4_put_stid+0xcd/0xe0 [nfsd] > [ 372.020003] [<ffffffffa016f69d>] nfs4_put_stid+0xcd/0xe0 [nfsd] > [ 372.020003] [<ffffffffa016f93f>] __destroy_client+0xdf/0x160 [nfsd] > [ 372.020003] [<ffffffffa016f9e2>] expire_client+0x22/0x30 [nfsd] > [ 372.020003] [<ffffffffa016fd9e>] laundromat_main+0x18e/0x4d0 [nfsd] > [ 372.020003] [<ffffffff810af88d>] process_one_work+0x14d/0x400 > [ 372.020003] [<ffffffff810b021b>] worker_thread+0x6b/0x4a0 > [ 372.020003] [<ffffffff810b01b0>] ? rescuer_thread+0x2a0/0x2a0 > [ 372.020003] [<ffffffff810b52fa>] kthread+0xea/0x100 > [ 372.020003] [<ffffffff810b5210>] ? kthread_create_on_node+0x1a0/0x1a0 > [ 372.020003] [<ffffffff81746a3c>] ret_from_fork+0x7c/0xb0 > [ 372.020003] [<ffffffff810b5210>] ? kthread_create_on_node+0x1a0/0x1a0 > [ 372.020003] Code: c3 66 41 83 47 08 01 fb 66 66 90 66 66 90 eb ca 31 c0 > eb ce e8 40 0d 95 ff 66 66 66 66 90 55 48 89 e5 66 83 07 01 48 89 f7 57 9d > <66> 66 90 66 90 5d c3 0f 1f 80 00 00 00 00 66 66 66 66 90 55 48 > > > I'll see if I can reproduce on 3.18.. This looks pretty close to me, on 3.18: https://bugzilla.redhat.com/show_bug.cgi?id=1185519 -- Anthony - https://messinet.com/ - https://messinet.com/~amessina/gallery 8F89 5E72 8DF0 BCF0 10BE 9967 92DC 35DC B001 4A4E
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