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SubjectRe: Sporadious hang on 2.0.3[0,1,2,3,4pre2]
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Daniel Ryde wrote:
>We have many servers here running 2.0.3x kernels. Most of these don't have
>any problems at all, it is very seldom these hangs, even those under heavy
>load. Exept all the terminal servers.
>
>The difference between these is:
> They mostly run ppp, sometimes slip
> They use many serial ports
> They do "slow" forwarding
> They handle alot of interrups

There was (is?) a race condition in some versions of the ppp driver, whereby
two pppds could both open the same port. What would happen is that one
process would close the port and set the speed to zero while another process
was writing data into it. This would put the kernel into a dead loop.

I thought this bug had long ago been fixed, but it seems it hasn't...

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