RHEL6.1: NFS server (nfsd) exporting IBM GPFS file system panics in get_page called from tcp_sendpage
Issue
- PANIC: "Oops: 0002 [#1] SMP " with command "nfsd"
- Kernel crash almost identical to NFS server (nfsd) panics in tcp_sendpage because of overrun of rq_pages array and bz 814626
crash> bt
PID: 735702 TASK: ffff880503e83540 CPU: 13 COMMAND: "nfsd"
...
[exception RIP: get_page+9]
RIP: ffffffff81123289 RSP: ffff880503e85ba0 RFLAGS: 00010246
RAX: ffffffff81b130a0 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000001000 RSI: 000000000000b500 RDI: 0000000000000000
RBP: ffff880503e85ba0 R8: 0000000000000002 R9: 0000000000000000
R10: 0000000000000000 R11: 0000000000000002 R12: ffff8805197516c0
R13: ffff880d58042140 R14: 0000000000000000 R15: 0000000000000001
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#9 [ffff880503e85ba8] tcp_sendpage at ffffffff81460955
#10 [ffff880503e85c58] kernel_sendpage at ffffffff8140ab38
#11 [ffff880503e85c98] svc_send_common at ffffffffa0441ccd [sunrpc]
#12 [ffff880503e85d18] svc_sendto at ffffffffa0441da2 [sunrpc]
#13 [ffff880503e85e28] svc_tcp_sendto at ffffffffa0441fb9 [sunrpc]
#14 [ffff880503e85e58] svc_send at ffffffffa044d87b [sunrpc]
#15 [ffff880503e85e98] svc_process at ffffffffa043fac0 [sunrpc]
#16 [ffff880503e85eb8] nfsd at ffffffffa068cb62 [nfsd]
Environment
- Red Hat Enterprise Linux 6.1
- kernel 2.6.32-131.34.1.el6.x86_64
- NFS Server exporting IBM GPFS file system
- This node is set as gateway nodes in Panache configuration.
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