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Date:      Fri, 10 May 2002 05:43:32 +0000
From:      Baldur Gislason <baldur@foo.is>
To:        alasir@supereva.it
Cc:        freebsd-stable@freebsd.org
Subject:   Re: silo overflows??
Message-ID:  <20020510054350.871682744@tesla.foo.is>
In-Reply-To: <20020510040818.33340.qmail@web11205.mail.yahoo.com>
References:  <20020510040818.33340.qmail@web11205.mail.yahoo.com>

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I've only seen this silo overflow stuff when I've been using pppd on a serial 
line with no hardware handshaking.

Baldur

On Friday 10 May 2002 04:08, you wrote:
> It looks like I've found out a reason of these
> overflows.
>
> When I try to download any MP3 file from WWW I have an
> old habit to buffer about 10% to hard drive and play
> it back using XMMS to make sure it's good enough
> quality to download all the file. IMHO, wget or
> another downloader over PPP expects problems while
> writing data to the file still being used by different
> application [XMMS], so data is kept in FIFO buffers,
> waiting. But seconds pass and file is still on use, so
> serial port FIFO buffers get overflown.
> When I stop XMMS, downloading process continues
> normally and error messages cease.
>
> Rhett
>
> --- Matthew Dillon <dillon@apollo.backplane.com>
>
> wrote:
> >     I don't know if this is related but on my Sony
> > VAIO desktop
> >     the serial receive interrupt occassionally stops
> > operating...
> >     that is, I only receive characters queued up in
> > the serial
> >     port's hardware FIFO when I transmit something
> > over the serial
> >     link.  I've never been able to track the problem
> > down.
> >
> >     The effect is that the PPP link run over the
> > serial port stalls,
> >     fails, and hangs up.  Once the machine gets into
> > this state only
> >     a reboot will fix it.  It does not happen on any
> > of my other boxes.
> >
> > 					-Matt
> > 					Matthew Dillon
> > 					<dillon@backplane.com>
> >
> > :Hello all,
> > :from time to time one of my machines loses dial-up
> > :connection with local ISP. It appears on
> >
> > non-regular
> >
> > :basis, just at some moment connection "freezes",
> > :however carrier isn't lost, but a number of error
> > :messages from kernel shows up:
> > :
> > :PPP ON localhost> Apr 29 04:14:01 /xeon: sio1: 1
> >
> > more
> >
> > :silo overflow (total 540)
> > :Apr 29 04:14:01 /xeon: sio1: 1 more silo overflow
> > :(total 540)
> > :Apr 29 04:14:17 /xeon: sio1: 23 more silo overflows
> > :(total 563)
> > :Apr 29 04:14:17 /xeon: sio1: 23 more silo overflows
> > :(total 563)
> > :Apr 29 04:14:20 /xeon: sio1: 17 more silo overflows
> > :(total 580)
> > :Apr 29 04:14:20 /xeon: sio1: 17 more silo overflows
> > :(total 580)
> > :Apr 29 04:14:27 /xeon: sio1: 31 more silo overflows
> > :(total 611)
> > :Apr 29 04:14:27 /xeon: sio1: 31 more silo overflows
> > :(total 611)
> > :Apr 29 04:14:40 /xeon: sio1: 7 more silo overflows
> > :(total 618)
> > :Apr 29 04:14:40 /xeon: sio1: 7 more silo overflows
> > :(total 618)
> > :Apr 29 04:15:06 /xeon: sio1: 7 more silo overflows
> > :(total 625)
> > :Apr 29 04:15:06 /xeon: sio1: 7 more silo overflows
> > :(total 625)
> > :
> > :And so on. Errors are reported by kernel, so
> >
> > killing
> >
> > :pppd doesn't help, of course. Rebooting is the only
> > :way to go. Had anyone else tried to solve such a
> > :problem?
> > :
> > :Rhett Hollander
> > :
> > :P.S. COM2 was disabled in BIOS, and USR Courier ISA
> > :hangs on it. Modem is known to work fine.
>
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