Date: Tue, 22 Aug 1995 17:07:19 +1000 From: Bruce Evans <bde@zeta.org.au> To: bde@zeta.org.au, freebsd-bugs@freefall.FreeBSD.org, ponds!rivers@dg-rtp.dg.com, ponds!rivers@zeta.org.au Subject: Re: Problem with sio at high baud on 2.0.5? Message-ID: <199508220707.RAA27695@godzilla.zeta.org.au>
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> Then, I started pinging the remote host. After about 30 seconds, all
>modem traffics stops... then, after about a minute, the ping (which
>of course, gets no ICMP packets back) at this point begins issueing a message
>about "No buffer space available."
There was another report yesterday about "No buffer space available"
together with silo overflows. In your case this is explained by
something retrying the send while the low level remained wedged.
>4 sio lines
> LINE RAW CAN OUT HWT LWT COL STATE SESS PGID DISC
> cuaa0 114 0 0 2052 256 -22912 OCl 582ea0 4991 term
> cuaa1 0 0 87 2052 256 6382 OCB 5325c0 7627 slip
^
I assumbe the B state never goes away. Is this correct? It means that
either the driver neglects to clear it or output really is wedged. Try
using a timeout to clear the wait:
comcontrol /dev/cuaa1 drainwait 1
kill pid-of-slip
Bruce
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