Kernel Soft lockup issue in Debian OS (7.X and 8.1)

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Plain text icon kernel softlock up traces166.34 KB
Plain text icon fio script505 bytes

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Hi,

I m using Debian 7.0, 7.X and 8.1 distro, when I run fio with Linux nvme driver on DELL R720/R820 server with 64 cores I see soft lockup.
Attached the kernel log which was taken on Debian 8.1 OS (R820) with inbox driver version0.9. Can you please help me analyze this issue. I m not seeing this issue on any other distributions like RHEL, Ubuntu, SLES or fedora.