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Date:	Tue, 21 Feb 2012 07:22:40 +0000 (GMT)
From:	Jongman Heo <jongman.heo@...sung.com>
To:	netdev@...r.kernel.org
Subject: WARNING: at kernel/softirq.c:159 _local_bh_enable_ip+0x35/0x71()


Hi all,

Host : windows 7 32bit
VMWare Guest : Fedora 16, with latest linus git kernel (3.3.0-rc4+). 
                        vmxnet3 ethernet driver, running NFS server

Following warning triggered with my VMware Linux guest, when NFS connection is requested from outside.

[  218.995266] ------------[ cut here ]------------
[  218.995279] WARNING: at kernel/softirq.c:159 _local_bh_enable_ip+0x35/0x71()
[  218.995282] Hardware name: VMware Virtual Platform
[  218.995284] Modules linked in: ip6table_filter ip6_tables ebtable_nat ebtables bridge stp llc bnx2i libiscsi scsi_transport_iscsi cnic uio snd_ens1371 gameport snd_rawmidi snd_ac97_codec ac97_bus snd_seq snd_seq_device snd_pcm snd_timer snd soundcore vmxnet3 vmw_balloon i2c_piix4 microcode snd_page_alloc nfsd lockd nfs_acl uinput auth_rpcgss sunrpc ipv6 mptspi mptscsih mptbase scsi_transport_spi [last unloaded: scsi_wait_scan]
[  218.995332] Pid: 835, comm: nfsd Not tainted 3.3.0-rc4+ #52
[  218.995334] Call Trace:
[  218.995341]  [<c07d7b56>] ? printk+0x18/0x1a
[  218.995347]  [<c0426e82>] warn_slowpath_common+0x77/0x8c
[  218.995351]  [<c042bbc2>] ? _local_bh_enable_ip+0x35/0x71
[  218.995354]  [<c042bbc2>] ? _local_bh_enable_ip+0x35/0x71
[  218.995358]  [<c0426eb4>] warn_slowpath_null+0x1d/0x1f
[  218.995361]  [<c042bbc2>] _local_bh_enable_ip+0x35/0x71
[  218.995365]  [<c042bc13>] local_bh_enable+0xb/0xd
[  218.995370]  [<c074ceb3>] kunmap_skb_frag+0xd/0xf
[  218.995373]  [<c074de3f>] skb_copy_bits+0xdc/0x18b
[  218.995377]  [<c074f60e>] __pskb_pull_tail+0x64/0x211
[  218.995382]  [<c04668b4>] ? arch_local_irq_save+0x12/0x17
[  218.995389]  [<f8b7841b>] vmxnet3_xmit_frame+0x3fa/0x9f7 [vmxnet3]
[  218.995393]  [<c042bba5>] ? _local_bh_enable_ip+0x18/0x71
[  218.995396]  [<c042bc06>] ? local_bh_enable_ip+0x8/0xa
[  218.995402]  [<c07dd6a4>] ? _raw_spin_unlock_bh+0xe/0x10
[  218.995431]  [<f858ea94>] ? svc_xprt_enqueue+0x15c/0x164 [sunrpc]
[  218.995436]  [<c0432185>] ? mod_timer_pending+0x15/0x17
[  218.995441]  [<c0757838>] dev_hard_start_xmit+0x36a/0x477
[  218.995446]  [<c0767e54>] sch_direct_xmit+0x4e/0x110
[  218.995450]  [<c0757b91>] dev_queue_xmit+0x24c/0x3c8
[  218.995453]  [<c07674d3>] ? eth_rebuild_header+0x5b/0x5b
[  218.995457]  [<c075ed3f>] neigh_resolve_output+0x107/0x135
[  218.995462]  [<c0770e15>] ? nf_hook_slow+0x51/0xe4
[  218.995470]  [<c077fc4e>] ip_finish_output2+0x1c9/0x1f5
[  218.995474]  [<c0780a9a>] ip_finish_output+0x35/0x39
[  218.995477]  [<c0781141>] ip_output+0x80/0x85
[  218.995481]  [<c0780a65>] ? __ip_append_data+0x704/0x704
[  218.995484]  [<c077f6bd>] dst_output+0xc/0xe
[  218.995487]  [<c0780b39>] ip_local_out+0x17/0x1a
[  218.995491]  [<c07817c9>] ip_send_skb+0x10/0x57
[  218.995496]  [<c07998a6>] udp_send_skb+0x216/0x264
[  218.995500]  [<c079992b>] udp_push_pending_frames+0x37/0x4f
[  218.995503]  [<c079ae3a>] udp_sendpage+0x113/0x12b
[  218.995507]  [<c079ad27>] ? udp_sendmsg+0x724/0x724
[  218.995510]  [<c07a0406>] inet_sendpage+0x67/0x78
[  218.995515]  [<c074723f>] kernel_sendpage+0x3e/0x4d
[  218.995518]  [<c07a039f>] ? inet_dgram_connect+0x5e/0x5e
[  218.995537]  [<f85879ad>] svc_send_common+0x4c/0x108 [sunrpc]
[  218.995556]  [<f8587ba0>] svc_sendto+0x137/0x1a7 [sunrpc]
[  218.995560]  [<c074e960>] ? __kfree_skb+0x6c/0x6f
[  218.995563]  [<c074e960>] ? __kfree_skb+0x6c/0x6f
[  218.995567]  [<c0750ec1>] ? skb_free_datagram_locked+0x85/0x98
[  218.995586]  [<f8587c24>] svc_udp_sendto+0x14/0x26 [sunrpc]
[  218.995606]  [<f858fae8>] svc_send+0x4f/0x8c [sunrpc]
[  218.995624]  [<f858528c>] svc_process+0xea/0xfb [sunrpc]
[  218.995637]  [<f8a220d8>] nfsd+0xd8/0x112 [nfsd]
[  218.995642]  [<c0444aac>] ? complete+0x42/0x49
[  218.995645]  [<f8a22000>] ? 0xf8a21fff
[  218.995649]  [<c043dd73>] kthread+0x67/0x6c
[  218.995652]  [<c043dd0c>] ? kthread_freezable_should_stop+0x3b/0x3b
[  218.995656]  [<c07e303e>] kernel_thread_helper+0x6/0xd
[  218.995659] ---[ end trace 7a05c607cadf6f61 ]---


Regards,
Jongman Heo.

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