メッセージログ警告: kernel/sched.c:5914 thread_return on RHEL6.2

Issue

• RHEL6 のカーネル 2.6.32-220.2.1.el6 をインストールしたら、以下の警告 (もしくは同等のもの) が表示されるようになりました。

WARNING: at kernel/sched.c:5914 thread_return+0x232/0x79d() (Not tainted)  
Hardware name:XYZ  
...  
Pid:1891, comm: qemu-kvm Not tainted 2.6.32-220.2.1.el6.x86_64 \#1  
Call Trace:  
[<ffffffff81069997>] ? warn\_slowpath\_common+0x87/0xc0  
[<ffffffff810699ea>] ? warn\_slowpath\_null+0x1a/0x20  
[<ffffffff814eccc5>] ? thread_return+0x232/0x79d  
[<ffffffff810958e3>] ?_\_hrtimer\_start\_range\_ns+0x1a3/0x460  
[<ffffffff81094dc1>] ? lock\_hrtimer\_base+0x31/0x60  
[<ffffffff814ee498>] ? schedule\_hrtimeout\_range+0xc8/0x160  
[<ffffffff81094b70>] ? hrtimer_wakeup+0x0/0x30  
[<ffffffff81095bd4>] ? hrtimer\_start\_range_ns+0x14/0x20  
[<ffffffff8118b079>] ? poll\_schedule\_timeout+0x39/0x60  
[<ffffffff8118b6e8>] ? do_select+0x578/0x6b0  
[<ffffffff81111b53>] ? filemap_fault+0xd3/0x500  
[<ffffffff8118b820>] ?__pollwait+0x0/0xf0  
[<ffffffff8118b910>] ? pollwake+0x0/0x60  
[<ffffffff81056623>] ? perf\_event\_task\_sched\_out+0x33/0x80  
[<ffffffff8122b9e4>] ? context\_struct\_compute_av+0x324/0x420  
[<ffffffff81053200>] ?_\_dequeue\_entity+0x30/0x50  
[<ffffffff810097cc>] ?_\_switch\_to+0x1ac/0x320  
[<ffffffff814ecae1>] ? thread_return+0x4e/0x79d  
[<ffffffff8100bc0e>] ? apic\_timer\_interrupt+0xe/0x20  
[<ffffffff8100ba4e>] ? common_interrupt+0xe/0x13  
[<ffffffff8100bc0e>] ? apic\_timer\_interrupt+0xe/0x20  
[<ffffffff8118c30a>] ? core\_sys\_select+0x18a/0x2c0  
[<ffffffff81056623>] ? perf\_event\_task\_sched\_out+0x33/0x80  
[<ffffffff810143d8>] ?_\_switch\_to_xtra+0x1e8/0x220  
[<ffffffff8100bdee>] ? reschedule_interrupt+0xe/0x20  
[<ffffffff81053200>] ?_\_dequeue\_entity+0x30/0x50  
[<ffffffff81012b59>] ? read_tsc+0x9/0x20  
[<ffffffff8109b629>] ? ktime\_get\_ts+0xa9/0xe0  
[<ffffffff81012b59>] ? read_tsc+0x9/0x20  
[<ffffffff8109b629>] ? ktime\_get\_ts+0xa9/0xe0  
[<ffffffff8118c697>] ? sys_select+0x47/0x110  
[<ffffffff8100b0f2>] ? system\_call\_fastpath+0x16/0x1b