soft lockup 2.6.15 with NR_CPUS=16 on quad xeon dual core HT

Hello,

some problem with DELL PowerEdge 6850 with four Dual-Core 64-bit Intel
Xeon Processor 7020, 2.66GHz, 667MHz front side bus, 2x1MB L2 cache.

INIT: version 2.86 booting
BUG: soft lockup detected on CPU#0!
Pid: 1148,comm:      modprobe
EIP: 0060:[<c010ffdd>] CPU: 0
EIP is at flush_tlb_others+0x8d/0xd6
EFLAGS: 00000206 Not tainted (2.6.15)
EAX: 000008fd EBX: f7bb9680 ECX: f7bb9680 EDX: 00000400
ESI: f7bb9680 EDI: f7bcf850 EBP: f7bcf73c DS: 007b ES: 0077b
CR0: 8005003b CR2: b7fa9000 CR3: 37a48280 CR4: 000006f0
[<c01100ba>] flush_tlb_mm+0x49/0x8d
[<c014f583>] unmap_region+0x108/0x144
[<c014f8b9>] do_munmap+0x108/0x144
[<c014f8b9>] sys_munmap+0x45/0x66
[<c0102d41>] syscall_call+0x7/0xb

Is somebody using such Hardware with kernel 2.6.x with HT?

Thanks,
Marco
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