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Date:      Sat, 22 Dec 2001 19:04:37 -0600
From:      "Jim King" <jim@jimking.net>
To:        "Matthew Dillon" <dillon@apollo.backplane.com>, "Josh Paetzel" <friar_josh@webwarrior.net>
Cc:        "Scott Lambert" <lambert@lambertfam.org>, <freebsd-stable@FreeBSD.ORG>
Subject:   Re: My first 4.5-PRERELEASE Issue
Message-ID:  <01e701c18b4d$cc18e210$0ae48486@mizar>
References:  <20011221151520.A3202@twincat.vladsempire.net> <20011222051904.GA39924@laptop.lambertfam.org> <20011222161225.A223@twincat.vladsempire.net> <200112222230.fBMMUgX96404@apollo.backplane.com> <20011222183759.B223@twincat.vladsempire.net> <200112230043.fBN0hJm98625@apollo.backplane.com>

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"Matthew Dillon" <dillon@apollo.backplane.com>:

> :> :> > as well:  sio0: 1 more silo overflow (total 1257)
> :> :> >   sio0: 1 more silo overflow (total 1258)
> :> :> >   sio0: 1 more silo overflow (total 1259)
> :> :> >   sio0: 1 more silo overflow (total 1260)
> :> :>
> :> :> Are you sure you haven't just previously overlooked these types of
messages?
> :> :
> :> :Yes.  They started when I indicated.
> :>
> :>     Try changing the FIFO_RX_HIGH to FIFO_RX_MEDH in isa/sio.c line
2385,
> :>     recompile your kernel, and see if that helps.
> :>
> :> -Matt
> :
> :Done and done.  Problem all gone.  Thanks.
> :
> :Josh
>
>     Uh huh.  I had this same exact problem years ago.  *YEARS* ago, and
>     proposed something similar but got shot down.  There isn't much of
>     a point of having a serial FIFO if you program it to interrupt you
>     a few bytes before it would otherwise overflow.
>
>     This time I'm going to commit the change.  Nay sayers can fix the
>     serial fast interrupt or fix the system to not disable interrupts
>     for long periods of time, and change it back AFTER they've done
>     that.

AT LAST!!!

I also had this problem years ago, also fixed it by changing the FIFO
trigger level, and was also shot down on this list.  Thanks for committing
this, Matt.

Jim



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