RHEL 6.4: kernel panic: FS-Cache: Unsupported event 81 [mask fffffffffffffffb] in state OBJECT_AVAILABLE

Issue

• Stack Trace:

<4>NFS: v4 server nfssrv does not accept raw uid/gids. Reenabling the idmapper.
<3>FS-Cache: Unsupported event 81 [mask fffffffffffffffb] in state OBJECT_AVAILABLE
<4>------------[ cut here ]------------
<2>kernel BUG at fs/fscache/object.c:368!
<4>invalid opcode: 0000 [#1] SMP 
<4>last sysfs file: /sys/devices/system/cpu/sched_smt_power_savings
<4>CPU 10 
<4>Modules linked in: fuse 8021q garp stp llc mptctl mptbase nfsd autofs4 nfs lockd auth_rpcgss nfs_acl sunrpc cachefiles fscache(T) ipv6 xfs exportfs raid0 hpwdt hpilo tg3 bnx2x libcrc32c mdio sg power_meter microcode serio_raw iTCO_wdt iTCO_vendor_support ioatdma dca shpchp ext4 mbcache jbd2 sd_mod crc_t10dif hpsa pata_acpi ata_generic ata_piix dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan]
<4>
<4>Pid: 2154, comm: kslowd000 Tainted: G           ---------------  T 2.6.32-358.2.1.el6.x86_64 #1 HP ProLiant DL380p Gen8
<4>RIP: 0010:[<ffffffffa01c10f6>]  [<ffffffffa01c10f6>] fscache_object_slow_work_execute+0x3d6/0x9d0 [fscache]
<4>RSP: 0018:ffff881025605de0  EFLAGS: 00010286
<4>RAX: 0000000000000057 RBX: ffff88101640cac0 RCX: 0000000000001e79
<4>RDX: 0000000000000000 RSI: 0000000000000046 RDI: 0000000000000246
<4>RBP: ffff881025605e20 R08: 0000000000000000 R09: 0000000000000002
<4>R10: ffffffff81641c80 R11: ffff882026855d2f R12: ffff88101640cb40
<4>R13: ffff88101640cb40 R14: ffff88101640cb48 R15: 0000000000000001
<4>FS:  0000000000000000(0000) GS:ffff881078840000(0000) knlGS:0000000000000000
<4>CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
<4>CR2: 00007f8410c6e710 CR3: 0000000001a85000 CR4: 00000000000407e0
<4>DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<4>DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
<4>Process kslowd000 (pid: 2154, threadinfo ffff881025604000, task ffff881026a36080)
<4>Stack:
<4> ffff881025605e00 ffffffff81096b67 ffff88101640cb48 0000000000000000
<4><d> ffffffff81f35820 ffff88101640cb40 ffff88101640cb48 0000000000000001
<4><d> ffff881025605e60 ffffffff8110e233 ffff881025605e60 ffff881025605e80
<4>Call Trace:
<4> [<ffffffff81096b67>] ? bit_waitqueue+0x17/0xd0
<4> [<ffffffff8110e233>] slow_work_execute+0x233/0x310
<4> [<ffffffff8110e515>] slow_work_thread+0x205/0x360
<4> [<ffffffff81096ca0>] ? autoremove_wake_function+0x0/0x40
<4> [<ffffffff8110e310>] ? slow_work_thread+0x0/0x360
<4> [<ffffffff81096936>] kthread+0x96/0xa0
<4> [<ffffffff8100c0ca>] child_rip+0xa/0x20
<4> [<ffffffff810968a0>] ? kthread+0x0/0xa0
<4> [<ffffffff8100c0c0>] ? child_rip+0x0/0x20
<4>Code: 90 49 8b 74 24 b8 49 8b 54 24 b0 e9 95 fd ff ff 41 8b 44 24 80 48 c7 c7 58 53 1c a0 48 8b 0c c5 60 7d 1c a0 31 c0 e8 1a c2 34 e1 <0f> 0b eb fe 41 be 0b 00 00 00 eb b4 41 be 0a 00 00 00 eb ac 41 
<1>RIP  [<ffffffffa01c10f6>] fscache_object_slow_work_execute+0x3d6/0x9d0 [fscache]
<4> RSP <ffff881025605de0>