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SubjectRe: 2.4.22pre8 hangs too (Re: 2.4.21-jam1 solid hangs)
On Thu, Aug 28, 2003 at 08:40:00AM +0300, Ville Herva wrote:
> On Thu, Aug 28, 2003 at 10:13:41AM +0900, you [TeJun Huh] wrote:
> >
> > Your problem sounds very simlar to the problem we were suffering.
> > The problem was a spinlock deadlock inside drivers/char/random.c which
> > is used by tcp to generate random initial sequence number. The bug
> > fix was checked into 2.4 tree on 28th July after the release of pre8
> > at 14th July.
> Uhh, I tried 2.4.22pre8 a while ago (I think it was Herbert P?tzl's
> suggestion), and it locked up too. Shame that the fix didn't make it in
> it...
> I'll give .22-final a spin.
> > This problem can happen on UP machine if the kernel is compiled with
> This is UP box and the kernel is _not_ compiled with CONFIG_SMP.

Then, it should be a different problem. That deadlock wouldn't occur
with UP kernel.

> > Because the offending routine is called only every five
> > minutes and it should receive a SYN packet while it's connecting, it
> > occurs rarely, but it happens when it happens.
> In my case, the lock up seems clearly related to disk io: it usually happens
> during the nightly oracle backup dump, and at some point it kept happening
> while compiling kernel. (It's random, I can no longer reproduce it by just
> compiling a kernel.)
> Do you still think it could be the same one?

No, I don't think so anymore. I think trying kdb/kgdb would be

> > Please try 2.4.22.
> >
> > P.S. This bug is a real headache. We had many servers deployed and
> > they all randomly locked up about every two or four weeks. I believe
> > people should be warned about this one.
> What's really strange is that the box kept running with 2.4.20pre7 for
> almost a year without problems (with the same oracle dump jub in nightly
> cron), and then suddenly begun acting up on my the first day of my summer
> vacatnion...

Good luck. :-)


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