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Date:      23 May 2003 13:46:12 -0400
From:      Lowell Gilbert <freebsd-questions-local@be-well.no-ip.com>
To:        Aleksandr Shapayev <cojet@front.ru>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: 'silo overflow' kernel messages
Message-ID:  <44fzn5pndn.fsf@be-well.ilk.org>
In-Reply-To: <441001862.20030522003349@front.ru>
References:  <441001862.20030522003349@front.ru>

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Aleksandr Shapayev <cojet@front.ru> writes:

> FreeBSD 3.5-STABLE worked fine, but after installing 4.8-RELEASE I
> begin receive 'sio1: 1 more silo overflow (total 12)' messages while
> downloading large files.
> 
> 3.5-STABLE produced such messages only after switching to another
> console during file download. All connections were made to the same
> ISP by pppd with same options.
> 
> System configuration: Pentium III (600MHz) with 320Mb RAM, Courier
> V.Everything 56K external modem at /dev/cuaa1.


Something is blocking interrupts for too long.  
Make sure you've got decent FIFOs on your serial port...



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