Same problem here. Any intense inbound data transfer will trigger it,
but is seems that outbound transfers are good.

Linux panda 3.4.0-1489-omap4 #16-Ubuntu SMP PREEMPT Tue Dec 4 12:51:04
UTC 2012 armv7l armv7l armv7l GNU/Linux

[14189.778228] ------------[ cut here ]------------
[14189.778228] WARNING: at 
/build/buildd/linux-ti-omap4-3.4.0/net/ipv4/tcp.c:1496 tcp_recvmsg+0x21c/0x9c8()
[14189.778259] recvmsg bug: copied E3E9357C seq E3E935D3 rcvnxt E3E935D8 fl 0
[14189.778259] Modules linked in: wl12xx wlcore mac80211 ppdev lp parport 
cfg80211 joydev omapdce(C) rpmsg_omx rfcomm omaprpc(C) omap_remoteproc 
rpmsg_resmgr_common remoteproc bnep omap_rpmsg_resmgr rpmsg_resmgr 
virtio_rpmsg_bus virtio virtio_ring usbhid hid wlcore_sdio btwilink bluetooth 
leds_gpio gpio_keys gator btrfs zlib_deflate libcrc32c
[14189.778381] [<c001bc38>] (unwind_backtrace+0x0/0xec) from [<c05a58f0>] 
(dump_stack+0x20/0x24)
[14189.778411] [<c05a58f0>] (dump_stack+0x20/0x24) from [<c0045044>] 
(warn_slowpath_common+0x5c/0x74)
[14189.778442] [<c0045044>] (warn_slowpath_common+0x5c/0x74) from [<c0045118>] 
(warn_slowpath_fmt+0x40/0x48)
[14189.778442] [<c0045118>] (warn_slowpath_fmt+0x40/0x48) from [<c04fa004>] 
(tcp_recvmsg+0x21c/0x9c8)
[14189.778472] [<c04fa004>] (tcp_recvmsg+0x21c/0x9c8) from [<c051a65c>] 
(inet_recvmsg+0xb0/0xc8)
[14189.778503] [<c051a65c>] (inet_recvmsg+0xb0/0xc8) from [<c04a58ec>] 
(do_sock_read+0xd8/0xe8)
[14189.778503] [<c04a58ec>] (do_sock_read+0xd8/0xe8) from [<c04a6854>] 
(sock_aio_read+0x70/0x78)
[14189.778533] [<c04a6854>] (sock_aio_read+0x70/0x78) from [<c0143268>] 
(do_sync_readv_writev+0xa4/0xe0)
[14189.778564] [<c0143268>] (do_sync_readv_writev+0xa4/0xe0) from [<c0143508>] 
(do_readv_writev+0xc8/0x1c0)
[14189.778594] [<c0143508>] (do_readv_writev+0xc8/0x1c0) from [<c01436f0>] 
(vfs_readv+0x70/0x80)
[14189.778594] [<c01436f0>] (vfs_readv+0x70/0x80) from [<c014374c>] 
(sys_readv+0x4c/0xd0)
[14189.778625] [<c014374c>] (sys_readv+0x4c/0xd0) from [<c0013200>] 
(ret_fast_syscall+0x0/0x30)
[14189.778625] ---[ end trace 7497b2171c8532e7 ]---

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https://bugs.launchpad.net/bugs/1030397

Title:
  slowpath in tcp_recvmsg on pandaboard es

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