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Host stopped

DenisMDenisM ContributorCurrent User Role Beginner
Hi,
The host with Percona-Server-5.5.16 stopped with kernel panic.

Pid: 18409, comm: mysqld Tainted: G M D
2.6.32-71.29.1.el6.x86_64 #1
Call Trace:
<NMI> [<ffffffff814c8b54>] panic+0x78/0x137
[<ffffffff8106b613>] ? print_oops_end_marker+0x23/0x30
[<ffffffff814ccdfc>] die_nmi+0xfc/0x100
[<ffffffff814cd3aa>] nmi_watchdog_tick+0x1aa/0x200
[<ffffffff814cc923>] do_nmi+0x1a3/0x2d0
[<ffffffff814cc200>] nmi+0x20/0x30
[<ffffffff814cba6e>] ? _spin_lock+0x1e/0x30
<<EOE>> [<ffffffff8105655d>] task_rq_lock+0x5d/0xa0
[<ffffffff8105c251>] try_to_wake_up+0x51/0x380
[<ffffffff8105c5b0>] wake_up_state+0x10/0x20
[<ffffffff810a2820>] wake_futex+0x40/0x60
[<ffffffff810a4ac8>] futex_requeue+0x4b8/0x890
[<ffffffff810a4f46>] do_futex+0xa6/0xb00
[<ffffffffa01d63c0>] ? xfs_log_reserve+0xf0/0x150 [xfs]
[<ffffffffa01e0f30>] ? xfs_trans_reserve+0xa0/0x210 [xfs]
[<ffffffffa01e1cf9>] ? xfs_trans_unlocked_item+0x39/0x60 [xfs]
[<ffffffffa01c8606>] ? xfs_iunlock+0x86/0x100 [xfs]
[<ffffffffa01e6f28>] ? xfs_fsync+0x168/0x1c0 [xfs]
[<ffffffff810a5a1b>] sys_futex+0x7b/0x170
[<ffffffff810d4372>] ? audit_syscall_entry+0x272/0x2a0
[<ffffffff81013172>] system_call_fastpath+0x16/0x1b

There's no reason to ask my question here but 'mysqld' at the top.
I've got extra worry 'cause the same panic occured 2 weeks ago on another host with the same Percona server.
Please, what can cause the failures?

CentOS 6.0
DB files lie on XFS, as you can suspect.

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