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SubjectRe: Hang in 2.6.23-rc5
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On Sun, Sep 02, 2007 at 11:29:39PM +0200, FD Cami wrote:
> On Sun, 2 Sep 2007 22:38:28 +0200
> "Alessandro Suardi" <alessandro.suardi@gmail.com> wrote:
>
> > On 9/2/07, charles gagalac <charles.gagalac@gmail.com> wrote:
> > > On 9/2/07, daryll q wrote:
> > > > Upgraded my kernel from 2.6.23-rc2 to 2.6.23-rc5.
> > > >
> > > > System hangs (caps lock and scroll lock leds are both flashing).
> > > >
> > > > It *randomly* happens but most of the time during after login to
> > > > KDE.
> > > >
> > > > I have not investigated it yet because I have not tried doing
> > > > it before.
> > > >
> > > > Also the system is really not responding so I can't do much..
> > > > Just hope it blue screen so I can send the error code easily :)
> > >
> > > i experienced hangs, with the flashing caps and scroll locks as
> > > you've described, in a few of my later pulls prior to rc5. i
> > > couldn't reproduce the hangs and my logs didn't show evidence of a
> > > problem. my system under rc5, so far, hasn't hung on me.
> > >
> > > charles
> >
> > Oh, I thought I was the only one. I also had a single hang+flashing
> > Caps & Scroll Lock with -rc5, but haven't had one since.
> >
> > I had VMWare Player modules loaded at the time though, and I
> > recently rebuilt them with the any-any-patch-113 (earlier versions
> > would not build with very recent kernels).
> >
> > -rc4-git2 and -git3 never hung even with VMWare modules loaded.
> >
> > So I disabled the autoload of VMWare stuff. The problem has not
> > reproduced so far. My system is a Dell D610, running updated
> > Fedora 7, with Intel 915GM video chipset.
>
> I've just had a kernel panic, running a vanilla 2.6.23-rc5, no
> proprietary modules loaded, running X11 under moderate load.
> 2.6.23-rc[2-4] have been rock solid on the same box. I've reverted
> to rc4 for now.

Try this from net-2.6 tree:

--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -560,7 +560,7 @@ static u32 tcp_rto_min(struct sock *sk)
struct dst_entry *dst = __sk_dst_get(sk);
u32 rto_min = TCP_RTO_MIN;

- if (dst_metric_locked(dst, RTAX_RTO_MIN))
+ if (dst && dst_metric_locked(dst, RTAX_RTO_MIN))
rto_min = dst->metrics[RTAX_RTO_MIN-1];
return rto_min;
}
-
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