On Sun, 2005-09-11 at 09:56, Robert Slade wrote: > Hi, > > I have been having problems with random reboots when using the SMP > Kernel on the above Quad processor machine. It occurs with bot 5.4 and > 6.0B4. It does not happen with a single processor kernel, well not in > the last 12 hours. > > Searching the mailing list and google has thrown up a number of possible > causes: > > a. there was an issue with the SMP kernel under load in 5.3 but the > errata says the fix was incorporated in 5.4; > > b. there appears to be some problems with with the ACPI with some > machines. Unfortunately, the SMP kernel needs ACPI so turning it off is > not an option. > > c. there appears to be an issue with some network cards and USB with > interupt 'storms'. The machine has 2 network cards both identified in > dmesg as Compaq Netelligent 10/100, athough only one is in use. I am > getting tl0: tx underrun -- increasing tx threshold to 512 bytes when > using vncserver to run xwindows with KDE which maybe related. > > It looks like the most likely cause is ACPI, SMP or both, but as ACPI > relates to interups, the interup 'storm' issue could be impacting. > However I do not know enough about the workings of ACPI etc to be able > to judge this. It looks to me that there is a number of things I could > do to isolate the problem: > > 1. try building a kernel without SMP but with ACPI to see what effect > that has. Question is is this possible with 6.0B4? > > 2. if the above gives a problem try changing the network cards for > another type. > > 3. fix the underrun issue but I am not sure how to do that. > > I would be grateful for any comments ideas on the way forward as the > machine is quite slow without the SMP kernel. > > Thanks > > Rob
I know replying to you own messages is a sign of something or other. I have tried the machine with SMP disabled in the kernel and ACPI only. It has been running for over 22 hours with any problems. Next step - trying a new kernel with SMP enabled. Rob _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
