From: Cong Wang <xiyou.wangcong@gmail.com>
To: netdev@vger.kernel.org
Subject: Re: huh, entered softirq 3 NET_RX 082db810 preempt_count 00000101, exited with fffefc05?
Date: Mon, 29 Oct 2012 08:09:01 +0000 (UTC) [thread overview]
Message-ID: <k6ldit$kkk$1@ger.gmane.org> (raw)
In-Reply-To: 508AF3D4.4020707@gmx.de
On Fri, 26 Oct 2012 at 20:34 GMT, Toralf Förster <toralf.foerster@gmx.de> wrote:
> At a user mode linux image (unstable Gentoo) I experienced a hang
> (100% CPU of the linux process), no reaction anymore.
>
> The last lines in the syslog of the UML gave:
>
> ...
> Oct 26 22:18:07 n22_uml kernel: Virtual console 6 assigned device '/dev/pts/5'
> Oct 26 22:18:07 n22_uml kernel: Virtual console 4 assigned device '/dev/pts/6'
> Oct 26 22:18:07 n22_uml kernel: Virtual console 5 assigned device '/dev/pts/8'
> Oct 26 22:18:07 n22_uml kernel: Virtual console 3 assigned device '/dev/pts/9'
> Oct 26 22:18:07 n22_uml kernel: Virtual console 2 assigned device '/dev/pts/10'
> Oct 26 22:18:07 n22_uml kernel: Virtual console 1 assigned device '/dev/pts/11'
> Oct 26 22:19:05 n22_uml kernel: ------------[ cut here ]------------
> Oct 26 22:19:05 n22_uml kernel: WARNING: at kernel/softirq.c:160 local_bh_enable+0x8f/0xa0()
> Oct 26 22:19:05 n22_uml kernel: 384fa37c: [<0836bc48>] dump_stack+0x22/0x24
> Oct 26 22:19:05 n22_uml kernel: 384fa394: [<0807fc2a>] warn_slowpath_common+0x5a/0x80
> Oct 26 22:19:05 n22_uml kernel: 384fa3bc: [<0807fd03>] warn_slowpath_null+0x23/0x30
> Oct 26 22:19:05 n22_uml kernel: 384fa3cc: [<0808733f>] local_bh_enable+0x8f/0xa0
> Oct 26 22:19:05 n22_uml kernel: 384fa3e0: [<082da6f8>] dev_queue_xmit+0xe8/0x270
> Oct 26 22:19:05 n22_uml kernel: 384fa410: [<082fd15f>] ip_finish_output+0x1af/0x370
> Oct 26 22:19:05 n22_uml kernel: 384fa444: [<082fd373>] ip_output+0x53/0x60
> Oct 26 22:19:05 n22_uml kernel: 384fa45c: [<082fc243>] ip_local_out+0x23/0x30
> Oct 26 22:19:05 n22_uml kernel: 384fa46c: [<082fc384>] ip_build_and_send_pkt+0x134/0x1f0
> Oct 26 22:19:05 n22_uml kernel: 384fa4a8: [<08319dc0>] tcp_v4_conn_request+0x7c0/0xcc0
Seems we want to send some packet inside tcp_v4_conn_request()
while we just receive one in softIRQ, not sure why we defer it.
Thanks.
prev parent reply other threads:[~2012-10-29 8:09 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-26 20:34 huh, entered softirq 3 NET_RX 082db810 preempt_count 00000101, exited with fffefc05? Toralf Förster
2012-10-29 8:09 ` Cong Wang [this message]
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