Messages in this thread | | | Date | Fri, 05 Dec 2003 13:23:15 +0200 | Subject | Re: PROBLEM: 2.6test11 kernel panic on "head -1 /proc/net/tcp" | From | lkml-031128@amos ... |
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OGAWA Hirofumi wrote: > lkml-031128@amos.mailshell.com writes: > > >>After I added Ogawa's line, "head -1 /proc/net/tcp" stopped >>freezing my machine but PPP failed to work. >> >>Also after adding Ogawa's line, PPP works fine (as it is now, as >>I write this message) as long as I don't try "head -1 /proc/net/tcp" >>after boot. If I'll try "head -1 /proc/net/tcp" now PPP will stop >>working. > > > Can you reproduce the fail of PPP? I couldn't reproduce it. > What reason is the fail of PPP? (the "debug" option of pppd may be helpful)
Sorry. I just tried:
1. From a multi-user mode, after an uptime of 5 days (test11 with your fix). 2. killed the ppp daemon (/etc/init.d/ppp stop). Made sure the ppp0 interface is down. 3. did "head -1 /proc/net/tcp" and "cat /proc/net/tcp". Passed fine. 4. re-startted ppp daemon. 5. System is fine. No kernel errors. PPP works flowlessly.
So I think my linking of PPP to the fix was wrong. Maybe the PPP failure was unrelated to this.
> > Of course, the following message is easy reproducible. But it's > debugging message, not the real problem. And probably it's unrelated > to the fail of PPP. > > >>>>>Badness in local_bh_enable at kernel/softirq.c:121 >>>>>Call Trace: >>>>> [<c011df25>] local_bh_enable+0x85/0x90 >>>>> [<c02315e2>] ppp_async_push+0xa2/0x180 >>>>> [<c0230efd>] ppp_asynctty_wakeup+0x2d/0x60 >>>>> [<c0202638>] pty_unthrottle+0x58/0x60 >>>>> [<c01ff0fd>] check_unthrottle+0x3d/0x40 >>>>> [<c01ff1a3>] n_tty_flush_buffer+0x13/0x60 >>>>> [<c0202a47>] pty_flush_buffer+0x67/0x70 >>>>> [<c01fba41>] do_tty_hangup+0x3f1/0x460
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