I see this bug alot, I can trigger it almost everytime i try to rsync to
my panda, here's the stack trace:

[  153.825866] ------------[ cut here ]------------                             
                                                                                
                                                                             
[  153.830749] WARNING: at net/ipv4/tcp.c:1508 tcp_recvmsg+0x194/0x858()        
                                                                                
                                                                             
[  153.837524] recvmsg bug 2: copied B1705247 seq B1705247 rcvnxt B17678B7 fl 0 
                                                                                
                                                                             
[  153.844970] Modules linked in: omapdce(C) omap_remoteproc remoteproc 
virtio_rpmsg_bus omapdrm_pvr(O)                                                 
                                                                                
     
[  153.854644] Backtrace:                                                       
                                                                                
                                                                             
[  153.857208] [<c0012a58>] (dump_backtrace+0x0/0x114) from [<c0465ed0>] 
(dump_stack+0x20/0x24)                                                          
                                                                                
    
[  153.866119]  r6:c03d7f30 r5:00000009 r4:eb53fd58 r3:c066e404                 
                                                                                
                                                                             
[  153.872131] [<c0465eb0>] (dump_stack+0x0/0x24) from [<c003efd8>] 
(warn_slowpath_common+0x5c/0x74)                                                
                                                                                
         
[  153.881469] [<c003ef7c>] (warn_slowpath_common+0x0/0x74) from [<c003f0ac>] 
(warn_slowpath_fmt+0x40/0x48)                                                   
                                                                               
[  153.891448]  r8:eb4c089c r7:00004000 r6:eb5a2840 r5:00000000 r4:eb4c0580     
                                                                                
                                                                             
[  153.898376] r3:00000009                                                      
                                                                                
                                                                             
[  153.901153] [<c003f06c>] (warn_slowpath_fmt+0x0/0x48) from [<c03d7f30>] 
(tcp_recvmsg+0x194/0x858)                                                       
                                                                                
  
[  153.910491]  r3:b1705247 r2:c05dba55                                         
                                                                                
                                                                             
[  153.914276] [<c03d7d9c>] (tcp_recvmsg+0x0/0x858) from [<c03f625c>] 
(inet_recvmsg+0xb0/0xc8)                                                        
                                                                                
       
[  153.923095] [<c03f61ac>] (inet_recvmsg+0x0/0xc8) from [<c0395658>] 
(sock_aio_read+0xf0/0x10c)                                                      
                                                                                
       
[  153.932067]  r8:ebe04c40 r7:eb53fea0 r6:00004000 r5:00000000 r4:eb53fe20     
                                                                                
                                                                             
[  153.939178] [<c0395568>] (sock_aio_read+0x0/0x10c) from [<c00fe9cc>] 
(do_sync_read+0xa8/0xe8)                                                        
                                                                                
     
[  153.948181] [<c00fe924>] (do_sync_read+0x0/0xe8) from [<c00ff3a0>] 
(vfs_read+0xc0/0x144)                                                           
                                                                                
       
[  153.956726]  r7:eb53ff78 r6:beb0f2ec r5:eba723c0 r4:00004000                 
                                                                                
                                                                             
[  153.962707] [<c00ff2e0>] (vfs_read+0x0/0x144) from [<c00ff46c>] 
(sys_read+0x48/0x7c)                                                            
                                                                                
          
[  153.970886]  r8:00004000 r7:beb0f2ec r6:eba723c0 r5:00000000 r4:00000000     
                                                                                
                                                                             
[  153.977966] [<c00ff424>] (sys_read+0x0/0x7c) from [<c000e4c0>] 
(ret_fast_syscall+0x0/0x30)                                                     
                                                                                
           
[  153.986694]  r8:c000e728 r7:00000003 r6:0006cf70 r5:beb0f2e8 r4:00000003     
                                                                                
                                                                             
[  153.993774] ---[ end trace 7af48a97c38f2a75 ]---

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

Title:
  slowpath in tcp_recvmsg on pandaboard es

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