Messages in this thread | | | Date | Wed, 18 Jul 2007 14:48:56 +0200 | From | Ingo Molnar <> | Subject | Re: [patch] revert: [NET]: Fix races in net_rx_action vs netpoll |
| |
* Olaf Kirch <olaf.kirch@oracle.com> wrote:
> On Tuesday 17 July 2007 20:56, Ingo Molnar wrote: > > i logged these not via netconsole but via logging on over the console > > and using dmesg, so it should include everything. in the 100hz case the > > following seems to show the anomaly: > > > > NETDEV WATCHDOG: eth0: transmit timed out > > So, it seems as if for some reason, dev->poll isn't called frequently > enough. > > Here's a debugging patch that tries to locate the problem - can you > give it a try, please?
it triggers here:
netconsole: device eth0 not up yet, forcing it netconsole: timeout waiting for carrier console [netcon0] enabled WARNING: at kernel/softirq.c:138 local_bh_enable() [<c0105e4a>] show_trace_log_lvl+0x19/0x2e [<c0105f43>] show_trace+0x12/0x14 [<c0105f59>] dump_stack+0x14/0x16 [<c0130f8d>] local_bh_enable+0x95/0x15d [<c03cf35b>] netpoll_poll+0xaf/0x361 [<c03cf248>] netpoll_send_skb+0xe8/0x14c [<c03cf8d4>] netpoll_send_udp+0x258/0x260 [<c02f4016>] write_msg+0x53/0x8d [<c012c87e>] __call_console_drivers+0x4e/0x5a [<c012c8e7>] _call_console_drivers+0x5d/0x61 [<c012cf06>] release_console_sem+0x120/0x1c1 [<c012d70a>] register_console+0x22e/0x236 [<c02f3f98>] init_netconsole+0x55/0x67 [<c05e28e5>] kernel_init+0x154/0x2d9 [<c0105c5f>] kernel_thread_helper+0x7/0x10
I've uploaded the full log to:
http://redhat.com/~mingo/misc/100hz.2.log
something i noticed: netconsole output seems to trickle through though, but very, very slowly (a packet once every 4 seconds or so). TCP/IP is not functional.
also, i'm using netconsole via the command line (both the network driver and netconsole is built into the bzImage), maybe that makes a difference?
(if there's any other data you'd like to see, let me know.)
Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |