Hi all,
        I met with this warning when using iscsi with the 2.6.33-rc2.

------------[ cut here ]------------
WARNING: at drivers/scsi/libiscsi_tcp.c:996 
iscsi_tcp_task_xmit+0x15e/0x2b8 [libiscsi_tcp]()
Hardware name: OptiPlex 745
unexpected fifo state
Modules linked in: ipt_REJECT xt_tcpudp iptable_filter ip_tables 
x_tables bridge stp netconsole autofs4 hidp rfcomm l2cap crc16 bluetooth 
rfkill ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm ocfs2_nodemanager 
ocfs2_stackglue configfs sunrpc ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad 
ib_core ib_addr ipv6 iscsi_tcp libiscsi_tcp libiscsi 
scsi_transport_iscsi dm_mirror dm_region_hash dm_log dm_multipath dm_mod 
video output sbs sbshc battery acpi_memhotplug ac lp sg 
snd_hda_codec_analog snd_hda_intel dcdbas rtc_cmos tg3 snd_hda_codec 
rtc_core parport_pc rtc_lib libphy sr_mod cdrom parport tpm_tis 
serio_raw snd_seq_dummy tpm tpm_bios snd_seq_oss snd_seq_midi_event 
button snd_seq e1000 snd_seq_device shpchp snd_pcm_oss snd_mixer_oss 
i2c_i801 i2c_core snd_pcm snd_timer snd soundcore snd_page_alloc pcspkr 
ata_piix libata sd_mod scsi_mod ext3 jbd ehci_hcd ohci_hcd uhci_hcd 
[last unloaded: microcode]
Pid: 4125, comm: iscsi_q_4 Not tainted 2.6.33-rc2 #1
Call Trace:
  [<ffffffffa028a34c>] ? iscsi_xmitworker+0x0/0x2ae [libiscsi]
  [<ffffffffa029ae77>] ? iscsi_tcp_task_xmit+0x15e/0x2b8 [libiscsi_tcp]
  [<ffffffff8203712f>] ? warn_slowpath_common+0x77/0x8e
  [<ffffffff820371a2>] ? warn_slowpath_fmt+0x51/0x59
  [<ffffffff822f3ba0>] ? _raw_spin_lock_bh+0x9/0x1f
  [<ffffffffa029ae77>] ? iscsi_tcp_task_xmit+0x15e/0x2b8 [libiscsi_tcp]
  [<ffffffffa028a34c>] ? iscsi_xmitworker+0x0/0x2ae [libiscsi]
  [<ffffffffa028984f>] ? iscsi_xmit_task+0x45/0x83 [libiscsi]
  [<ffffffffa028a4d9>] ? iscsi_xmitworker+0x18d/0x2ae [libiscsi]
  [<ffffffff8204be27>] ? worker_thread+0x146/0x1e0
  [<ffffffff8204e79b>] ? autoremove_wake_function+0x0/0x2e
  [<ffffffff8204bce1>] ? worker_thread+0x0/0x1e0
  [<ffffffff8204e4a7>] ? kthread+0x79/0x81
  [<ffffffff82003614>] ? kernel_thread_helper+0x4/0x10
  [<ffffffff8204e42e>] ? kthread+0x0/0x81
  [<ffffffff82003610>] ? kernel_thread_helper+0x0/0x10
---[ end trace 962db674bc379fa3 ]---


iscsi target is
[r...@ocfs2-test1 ~]# cat /etc/distro-release
Openfiler NSA 2.3

iscsi initiator is
[r...@ocfs2-test2 ~]# rpm -qa|grep iscsi

The other thing I can confirm is that I didn't meet with such problem in 



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