On Thu, 2014-03-13 at 03:16PM -0700, Sören Brinkmann wrote: > Hi Nicolas, > > I did some testing on the current linux-next tree and ran iperf on Zynq. > It seems that network and even the whole system can collapse when doing > that. > I don't really know what's going on, but once I saw the message: > "inconsistent Rx descriptor chain" > printed twice (system frozen afterwards). > > I don't know what exactly is going wrong, but suspect something around > memory/DMA. I have no clue whether it makes any sense or not, but I > tried using the macb_* functions instead of the gem_* ones (see diff below). > That seems to result in a stable system and working Ethernet. That was a little too early. After roughly 25 minutest the system runs into a deadlock: BUG: spinlock lockup suspected on CPU#1, iperf/774 lock: 0xeda0366c, .magic: dead4ead, .owner: swapper/0/0, .owner_cpu: 0 CPU: 1 PID: 774 Comm: iperf Tainted: G W 3.14.0-rc6-next-20140312-xilinx-dirty #41 [<c00153c0>] (unwind_backtrace) from [<c0011e70>] (show_stack+0x10/0x14) [<c0011e70>] (show_stack) from [<c03d6b50>] (dump_stack+0x80/0xcc) [<c03d6b50>] (dump_stack) from [<c00670ac>] (do_raw_spin_lock+0xd4/0x190) [<c00670ac>] (do_raw_spin_lock) from [<c03dc79c>] (_raw_spin_lock_irqsave+0x58/0x64) [<c03dc79c>] (_raw_spin_lock_irqsave) from [<c02b0810>] (macb_start_xmit+0x24/0x2d0) [<c02b0810>] (macb_start_xmit) from [<c0321b10>] (dev_hard_start_xmit+0x334/0x470) [<c0321b10>] (dev_hard_start_xmit) from [<c0339aa8>] (sch_direct_xmit+0x78/0x2f8) [<c0339aa8>] (sch_direct_xmit) from [<c0321f60>] (__dev_queue_xmit+0x314/0x704) [<c0321f60>] (__dev_queue_xmit) from [<c034cb3c>] (ip_finish_output+0x6c4/0x894) [<c034cb3c>] (ip_finish_output) from [<c034cf24>] (ip_local_out+0x74/0x90) [<c034cf24>] (ip_local_out) from [<c034d340>] (ip_queue_xmit+0x400/0x5c4) [<c034d340>] (ip_queue_xmit) from [<c03634b8>] (tcp_transmit_skb+0xa18/0xab0) [<c03634b8>] (tcp_transmit_skb) from [<c035856c>] (tcp_recvmsg+0x92c/0xae4) [<c035856c>] (tcp_recvmsg) from [<c03806f0>] (inet_recvmsg+0x1c0/0x1fc) [<c03806f0>] (inet_recvmsg) from [<c030769c>] (sock_recvmsg+0x7c/0x98) [<c030769c>] (sock_recvmsg) from [<c0309988>] (SyS_recvfrom+0x9c/0x108) [<c0309988>] (SyS_recvfrom) from [<c0309a08>] (sys_recv+0x14/0x18) [<c0309a08>] (sys_recv) from [<c000ea60>] (ret_fast_syscall+0x0/0x48) Sören -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html