kernel: WARNING: at lib/kref.c:43 kref_get
Issue
- On two servers we are seeing kernel warning messages and would like to discover what is the significance of these messages and what issue are they reporting.
kernel: ------------[ cut here ]------------
kernel: WARNING: at lib/kref.c:43 kref_get+0x2d/0x30() (Tainted: G W --------------- )
kernel: Hardware name: UCSB-B200-M3
kernel: Modules linked in: nfs lockd fscache auth_rpcgss nfs_acl sunrpc 8021q garp stp llc acpi_cpufreq freq_table mperf ipv6 enic iTCO_wdt iTCO_vendor_support microcode power_meter sb_edac edac_core i2c_i801 i2c_core lpc_ich mfd_core sg shpchp ext4 jbd2 mbcache sd_mod crc_t10dif wmi megaraid_sas dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan]
kernel: Pid: 0, comm: swapper Tainted: G W --------------- 2.6.32-431.20.3.el6.x86_64 #1
kernel: Call Trace:
kernel: <IRQ> [<ffffffff81071b37>] ? warn_slowpath_common+0x87/0xc0
kernel: [<ffffffff81071b8a>] ? warn_slowpath_null+0x1a/0x20
kernel: [<ffffffff8128631d>] ? kref_get+0x2d/0x30
kernel: [<ffffffff81284f9a>] ? kobject_get+0x1a/0x30
kernel: [<ffffffff81265d8e>] ? blk_get_queue+0x1e/0x30
kernel: [<ffffffff81388827>] ? scsi_run_queue+0x157/0x270
kernel: [<ffffffff81381620>] ? __scsi_put_command+0x60/0xa0
kernel: [<ffffffff81389952>] ? scsi_next_command+0x42/0x60
kernel: [<ffffffff8138a6ce>] ? scsi_io_completion+0x2ae/0x6c0
kernel: [<ffffffff81380952>] ? scsi_finish_command+0xc2/0x130
kernel: [<ffffffff8138ac45>] ? scsi_softirq_done+0x145/0x170
kernel: [<ffffffff8126f215>] ? blk_done_softirq+0x85/0xa0
kernel: [<ffffffff8107a5f1>] ? __do_softirq+0xc1/0x1e0
kernel: [<ffffffff810e6ce0>] ? handle_IRQ_event+0x60/0x170
kernel: [<ffffffff8100c30c>] ? call_softirq+0x1c/0x30
kernel: [<ffffffff8100fa75>] ? do_softirq+0x65/0xa0
kernel: [<ffffffff8107a4a5>] ? irq_exit+0x85/0x90
kernel: [<ffffffff81531f05>] ? do_IRQ+0x75/0xf0
kernel: [<ffffffff8100b9d3>] ? ret_from_intr+0x0/0x11
kernel: <EOI> [<ffffffff812e134e>] ? intel_idle+0xde/0x170
kernel: [<ffffffff812e1331>] ? intel_idle+0xc1/0x170
kernel: [<ffffffff814272f7>] ? cpuidle_idle_call+0xa7/0x140
kernel: [<ffffffff81009fc6>] ? cpu_idle+0xb6/0x110
kernel: [<ffffffff81521c5c>] ? start_secondary+0x2ac/0x2ef
kernel: ---[ end trace ada9fac062ce7101 ]---
Environment
- Red Hat Enterprise Linux (RHEL) 6.5
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