Messages in this thread | | | Date | Mon, 21 Feb 2000 11:53:16 +0100 | From | Fabrice Bellet <> | Subject | Re: PPP is not SMP safe in 2.2.X (fix) |
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Hello,
I use PPP on an SMP box to get an xDSL link up. So PPP uses a pty instead of a serial port to write data to. A userland daemon -- pptp -- reads the pty, does some hdlc-to-gre conversion, and send the result to the xDSL modem directly.
Everything goes fine on uni-processor. On SMP, pptp often gets confused when dealing with outgoing packets coming from masqueraded hosts (the SMP box acts as a firewall in my configuration).
The data that pptp reads from the pty have bad FCS, and the xDSL link promptly crashes. I assume that this problem comes from a race condition in the ppp code or the masquerading code (but both ipchains et netfilter trigger the bug).
Paul Mackerras's and Oleg's patches didn't solve the problem : I also tried to extend the fix in ldisc calling from serial.c to pty.c without more success.
Suggestions to fix this behaviour are welcome :-)
Regards, Fabrice
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