Messages in this thread |  | | Date | Fri, 9 Nov 2001 10:21:41 +0100 | From | root <> | Subject | serial console slow |
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Hi!
> I tried to boot my kernel using the serial console, using the > console=ttyS0,115200 (it does the same thing with 9600) ... it work great > until : > > Freeing unused kernel memory: 36k freed > serial console detected. Disabling virtual terminals. > console=/dev/ttyS0 > > At this point the output of the serial line slow down dramaticly ... almost > to a halt ... I get 1 line every 30 seconds !!! > > why is this slow down occuring ? the part which is 100% kernel is going fast > and ok, but when it become console related ... it slows down ?
Serial just got its control signals (it is now *userland* writing, and userland honours them), plus userland is probably opening/closing serial all the time. Bad. Pavel
-- Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt, details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.
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-- -- I'm really pavel@atrey.karlin.mff.cuni.cz. Pavel Look at http://atrey.karlin.mff.cuni.cz/~pavel ;-). - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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