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    SubjectRe: How to avoid serial port buffer overruns?
    FromLee Revell <>
    DateWed, 16 Aug 2006 17:12:19 -0400
    On Wed, 2006-08-16 at 14:23 -0500, Paul Fulghum wrote:
    > Lee Revell wrote:
    > > On Wed, 2006-08-16 at 12:45 +0200, Raphael Hertzog wrote:
    > >>Now I switched to stock 2.6 and while the stock kernel improved in
    > >>responsiveness, it still isn't enough by default (even with
    > >>CONFIG_PREEMPT=y and CONFIG_HZ=1000). So I wanted to try the "rt" patch of
    > >>Ingo Molnar and Thomas Gleixner, but the patched kernel doesn't boot (see
    > >>bug report in a separate mail on this list).
    > > 
    > > 
    > > Does the serial performance seem to have regressed from 2.4 to 2.6?  I
    > > am chasing a similar issue with a serial MIDI card (supported by the bog
    > > standard 8250 serial driver) that drops notes under 2.6 but works with
    > > 2.4.  I don't have details yet, but it sounds like a similar problem.
    > 
    > What specific 2.6 kernels are each of you using?
    > 
    
    2.6.15 and 2.6.16.  Here is the .config:
    
    http://members.dca.net/rlrevell/serialbug-config
    
    I don't know which 2.4 version they tested on that worked - just that
    the problem started when moving to 2.6.
    
    Lee
    
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