LinuxQuestions.org

LinuxQuestions.org (/questions/)
-   Slackware (https://www.linuxquestions.org/questions/slackware-14/)
-   -   Which CPU arch is min for SMP kernel? (https://www.linuxquestions.org/questions/slackware-14/which-cpu-arch-is-min-for-smp-kernel-4175424993/)

Merc_z 08-31-2012 11:02 AM
Which CPU arch is min for SMP kernel?
 
The slackware readme file suggests running smp kernel even in a single core processor system. How far back would be suggested? Pentium/ii/iii, p4???

GazL 08-31-2012 11:09 AM
I think you can go as far back as the pentium pro, but that's just from memory. SMP kernel used to work fine on an old P3-800 box I used to have.

Didier Spaier 08-31-2012 11:45 AM
The help text of upcoming Slackware 14' installer confirms GazL's answer:
Quote:
The default kernel is hugesmp.s, which requires ay least a Pentium Pro processor. If this kernel doesn't work for you, you may try the regular "huge.s" kernel, which supports i486 and better single CPU machines.

damgar 08-31-2012 02:21 PM
On a machine that never had issues with smp and a Celeron@ 2ghz I started getting "CPU temp above threshhold" after a recent -current upgrade. I can't be sure that it had anything to do with a newer kernel, but I didn't see it again when I switched to a non smp kernel. Having said that it is entirely possible it is just old hardware failing. I haven't left the machine on or used it much until I have time to thoroughly babysit it.

ReaperX7 08-31-2012 06:27 PM
The SMP kernel will work fine on most older CPUs under the x86 umbrella. There are some it might have issues with so read the documentation carefully.

allend 08-31-2012 07:49 PM
For me, when the SMP kernel has failed to boot, it has been because the processor does not support the 'cmov' instruction.
You can check this by using 'cat /proc/cpuinfo' and looking at the 'flags' line. If you search for 'linux cpu flags' you can find further information.


All times are GMT -5. The time now is 02:43 AM.