Messages in this thread | | | Date | Mon, 06 Sep 2004 16:45:22 +0100 | From | James Courtier-Dutton <> | Subject | Re: Linux serial console patch |
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Russell King wrote: > On Mon, Sep 06, 2004 at 10:32:27AM +0000, Danny ter Haar wrote: > >>James Courtier-Dutton <James@superbug.demon.co.uk> wrote: >> >>>>I have read your posts to lkml containing your serial console flow control >>>>patches firstly for 2.4.x and then for 2.6.x kernels. >>> >>>Does this fix junk being output from the serial console? >>>If one is using Pentium 4 HT, it seems that both CPU cores try to send >>>characters to the serial port at the same time, resulting in lost >>>characters as one CPU over writes the output from the other. >> >>We have multiple P4-HT enabled servers with debian installed & serial >>console enabled (RPB++ ;-) and _i_ have never seen this behaviour. > > > I don't think this is a serial problem as such, but a problem with the > kernel console subsystem (printk) itself. Maybe James can provide an > example output to confirm exactly what he's seeing. >
http://www.superbug.demon.co.uk/latency/
There are 2 oops traces there. At about line 176, the corruption starts.
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