Date: 1 Mar 1999 09:05:29 +0100 From: Graeme Brown <graeme.brown@bt-sys.bt.co.uk> To: "FreeBSD-Net (FreeBSD.Org) List" <freebsd-net@freebsd.org> Subject: FW: Troubles with BSDATM and PVCs Message-ID: <n1291843573.42534@maczebedee>
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Folks
I know that some of us have had troubles with Efficient Networks Inc ATM cards
appearing to fail under FreeBSD and the ALTQ package. This has plagued
myself, Gordana and Antonio
to my knowledge. I have learnt (see below) that there is a bug in the atm
card driver. I recently returned eight atm cards (failures suspected by
myself, Gordana and Antonio) to ENI in the States and they tested them and
found them all to be OK !
The patch to fix this is given by Panos Gevros of UCL below. However Panos
claimed it is fixed in altq-1.1.3 but Kenjiro Cho (ALTQ author) admitted that
the bug has crept into altq-1.1.3.
Anyway to use the patch
i) save it in a file say <some-directory>/midway.patch
where <some-directory> is a directory of your choice.
ii) go through the step to apply the sys-altq.patch in the procedure
of building the ALTQ kernel as given in ALTQ install instructions.
iii) next
cd /usr/src/sys-altq/dev/en
patch -p < <some-directory>/midway.patch
iv) compile the ALTQ kernel as per usual.
Hope this helps
Graeme
_______________________________________________________________________________
To: Graeme Brown
Cc: P.Gevros@cs.ucl.ac.uk
From: Panos GEVROS on Thu, Feb 25, 1999 4:42 pm
Subject: Re: Troubles with BSDATM and PVCs
Graeme,
there is a bug in the ATM driver which causes interfaces to freeze
occasionally
we used to have this problem and talked to Kenjiro, it is fixed in altq-1.1.3
Panos
----------------------------------------------------------------------
--- midway.c- Wed Oct 7 20:54:18 1998
+++ midway.c Thu Oct 8 12:24:34 1998
@@ -2237,7 +2237,11 @@
goto dequeue_drop;
}
- if (launch.need > sc->txslot[chan].bfree) {
+ /*
+ * note: don't use the entire buffer space. if WRTX becomes equal
+ * to RDTX, the transmitter stops assuming the buffer is empty! --kjc
+ */
+ if (launch.need >= sc->txslot[chan].bfree) {
EN_COUNT(sc->txoutspace);
#ifdef EN_DEBUG
printf("%s: tx%d: out of transmit space\n", sc->sc_dev.dv_xname, chan);
----------------------------------------------------------------------
|
|Over a time (say a few days) I find that typicaly one of the pvcsif
|becomes unserviceable, I cannot ping A->B or B->A from either
|end of the pvc. ping reports 100 % packet loss.
|
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