Messages in this thread | | | Subject | Re: How to avoid serial port buffer overruns? | From | Lee Revell <> | Date | Wed, 16 Aug 2006 17:12:19 -0400 |
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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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