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Newsgroups: comp.os.386bsd.bugs Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!bunyip.cc.uq.oz.au!munnari.oz.au!news.hawaii.edu!ames!agate!howland.reston.ans.net!news.sprintlink.net!news.clark.net!rahul.net!a2i!raw!iverson From: iverson@lionheart.com (Tim Iverson) Subject: Re: [FreeBSD 2.0-950112-SNAP] - SIO bug, driver discards chars References: <D2s65p.AKt@lionheart.com> <3ft7m8$7op@ucthpx.uct.ac.za> Organization: Lionheart Software Date: Fri, 27 Jan 1995 11:10:01 GMT Message-ID: <D329oq.Csn@lionheart.com> Lines: 27 In article <3ft7m8$7op@ucthpx.uct.ac.za>, S Marquard <smarq@ucthpx.uct.ac.za> wrote: >iverson@lionheart.com (Tim Iverson) writes: >>There is a bug in the SIO driver that causes it to discard characters if >>the tty is in raw mode and there is no space left in the clist - even when >>RTS/CTS is enabled. The SIO man page calls this a bug in the application > >Could someone describe this is more "end-user-ish" (:-) terms? >Under what circumstances does the bug manifest itself? How serious is it? >Is it likely to affect UUCP transfers, if so how? I've been corrected - it's not a bug, it's a feature; ie. the SIO driver doesn't really support flow control, the code just makes it look like it does. Yes, it could be a problem for UUCP, but not a big one - it might cause some packets to be resent. This is likely only for fast modems and protocols with large window sizes (eg. i protocol on v.34). On a 115200 baud direct link, it would discard 400-700 characters every five or ten minutes. More chars, more frequently, as the system is loaded. I'll be fixing this soon - probably Monday if I can find a spare hour or two. If I can't guess where to send the patches, I'll probably just post them to one of the 386bsd groups, like dev or bugs. - Tim Iverson iverson@lionheart.com