I expirince this from time to time with linux-linaro-lt-omap-3.4-3.4.0
kernel which as far as I know is based on linux-ti-omap4:


Jan 29 14:21:23 linaro-developer kernel: [ 1194.442504] WARNING: at 
/build/buildd/linux-linaro-lt-omap-3.4-3.4.0/net/ipv4/tcp.c:1508 
tcp_recvmsg+0x1b7/0x6d2()
Jan 29 14:21:23 linaro-developer kernel: [ 1194.442535] recvmsg bug 2: copied 
B7EF3F6 seq B7EF3F6 rcvnxt B80B236 fl 0
Jan 29 14:21:23 linaro-developer kernel: [ 1194.442535] Modules linked in: arc4 
wl12xx wlcore mac80211 cfg80211 omapdce(C) rpmsg_omx omaprpc(C) omap_remoteproc 
rpmsg_resmgr_common remoteproc omap_rpmsg_resmgr rpmsg_resmgr virtio_rpmsg_bus 
wlcore_sdio btwilink bluetooth usbhid hid
Jan 29 14:21:23 linaro-developer kernel: [ 1194.442687] [<c0011079>] 
(unwind_backtrace+0x1/0x90) from [<c002c849>] (warn_slowpath_common+0x39/0x50)
Jan 29 14:21:23 linaro-developer kernel: [ 1194.442718] [<c002c849>] 
(warn_slowpath_common+0x39/0x50) from [<c002c8c3>] (warn_slowpath_fmt+0x21/0x2a)
Jan 29 14:21:23 linaro-developer kernel: [ 1194.442749] [<c002c8c3>] 
(warn_slowpath_fmt+0x21/0x2a) from [<c03d05c9>] (tcp_recvmsg+0x1b7/0x6d2)
Jan 29 14:21:23 linaro-developer kernel: [ 1194.442779] [<c03d05c9>] 
(tcp_recvmsg+0x1b7/0x6d2) from [<c03e6b11>] (inet_recvmsg+0x8d/0xac)
Jan 29 14:21:23 linaro-developer kernel: [ 1194.442840] [<c03e6b11>] 
(inet_recvmsg+0x8d/0xac) from [<c0399831>] (sock_recvmsg+0x89/0x9c)
Jan 29 14:21:23 linaro-developer kernel: [ 1194.442871] [<c0399831>] 
(sock_recvmsg+0x89/0x9c) from [<c039a901>] (sys_recvfrom+0x65/0xa4)
Jan 29 14:21:23 linaro-developer kernel: [ 1194.442901] [<c039a901>] 
(sys_recvfrom+0x65/0xa4) from [<c039a953>] (sys_recv+0x13/0x14)
Jan 29 14:21:23 linaro-developer kernel: [ 1194.442932] [<c039a953>] 
(sys_recv+0x13/0x14) from [<c000c121>] (ret_fast_syscall+0x1/0x52)
Jan 29 14:21:23 linaro-developer kernel: [ 1194.442932] ---[ end trace 
797ab08fea357dfe ]---


Sometimes it stoppes after somes warnings (don't know why), sometime the log 
are growing up to gigabytes.

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

Title:
  slowpath in tcp_recvmsg on pandaboard es

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