rhel6 nfs client and softlock errors.

Issue

• rhel6 nfs client and softlock errors. Below softlockup message occurs.

        kernel: BUG: soft lockup - CPU#1 stuck for 61s! [ncvlog_cg:35064]
        kernel: Modules linked in: nfs fscache nfsd lockd nfs_acl auth_rpcgss sunrpc exportfs autofs4 ipv6 dm_mirror dm_region_hash dm_log kvm uinput power_meter hwmon sg serio_raw iTCO_wdt iTCO_vendor_support hpilo i7core_edac edac_core netxen_nic ext4 mbcache jbd2 sr_mod cdrom sd_mod crc_t10dif pata_acpi ata_generic ata_piix hpsa radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core dm_mod [last unloaded: microcode]
         kernel: CPU 1:
         kernel: Modules linked in: nfs fscache nfsd lockd nfs_acl auth_rpcgss sunrpc exportfs autofs4 ipv6 dm_mirror dm_region_hash dm_log kvm uinput power_meter hwmon sg serio_raw iTCO_wdt iTCO_vendor_support hpilo i7core_edac edac_core netxen_nic ext4 mbcache jbd2 sr_mod cdrom sd_mod crc_t10dif pata_acpi ata_generic ata_piix hpsa radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core dm_mod [last unloaded: microcode]
         kernel: Pid: 35064, comm: ncvlog_cg Not tainted 2.6.32-71.el6.x86_64 #1 ProLiant DL580 G7
         kernel: RIP: 0010:[<ffffffffa0488c63>]  [<ffffffffa0488c63>] nfs_commit_inode+0x73/0x1c0 [nfs]
        kernel: RSP: 0018:ffff880edae19b08  EFLAGS: 00000246
        kernel: RAX: 0000000000000002 RBX: ffff880edae19b68 RCX: ffff880028041ba8
         kernel: RDX: ffff880028041ba0 RSI: 0000000000000002 RDI: ffff880ba7d52a88
         kernel: RBP: ffffffff81013c8e R08: ffff880028041ba8 R09: f43a2dc0952e5807
         kernel: R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffa047b560
         kernel: R13: ffff880ba7d52960 R14: 0000000000000007 R15: 0000000000000206
         kernel: FS:  0000000000000000(0000) GS:ffff880061420000(0063) knlGS:00000000f76ad8d0
         kernel: CS:  0010 DS: 002b ES: 002b CR0: 000000008005003b
         kernel: [<ffffffffa0488c63>] ? nfs_commit_inode+0x73/0x1c0 [nfs]
         kernel: [<ffffffffa0488e29>] ? nfs_wb_page+0x79/0xd0 [nfs]
         kernel: [<ffffffffa04778de>] ? nfs_launder_page+0x4e/0x80 [nfs]
         kernel: [<ffffffff811233c6>] ? invalidate_inode_pages2_range+0x2f6/0x380
         kernel: [<ffffffff81123467>] ? invalidate_inode_pages2+0x17/0x20
         kernel: [<ffffffffa047ba48>] ? nfs_revalidate_mapping+0x128/0x170 [nfs]
         kernel: [<ffffffffa0478897>] ? nfs_file_read+0x77/0x130 [nfs]
         kernel: [<ffffffff8116c65a>] ? do_sync_read+0xfa/0x140
         kernel: [<ffffffff81091ca0>] ? autoremove_wake_function+0x0/0x40
         kernel: [<ffffffff810e9cb2>] ? ring_buffer_lock_reserve+0xa2/0x160
         kernel: [<ffffffff810d40a2>] ? audit_syscall_entry+0x272/0x2a0
         kernel: [<ffffffff811ff3b6>] ? security_file_permission+0x16/0x20
         kernel: [<ffffffff8116d085>] ? vfs_read+0xb5/0x1a0
         kernel: [<ffffffff8116d1c1>] ? sys_read+0x51/0x90
         kernel: [<ffffffff8104ca7f>] ? sysenter_dispatch+0x7/0x2e
         abrt: Kerneloops: Reported 1 kernel oopses to Abrt