[uml-user] sysconf(_SC_NPROCESSORS_CONF) returns incorrect on UML (0)

[Lars E. G <lar...@er...>]

Hello,

This may be caused by a bad configuration, or it may have been
corrected already. In that case I apologize.

I am using UML-kernel; 3.0.26

Anyway, this program;

#include <stdio.h>
#include <unistd.h>
int main(int argc, char* argv[])
{
	printf("_SC_NPROCESSORS_CONF = %d\n", sysconf(_SC_NPROCESSORS_CONF));
	printf("_SC_NPROCESSORS_ONLN = %d\n", sysconf(_SC_NPROCESSORS_ONLN));
	return 0;
}

prints;

_SC_NPROCESSORS_CONF = 0
_SC_NPROCESSORS_ONLN = 1

I found this when using http://lttng.org/ust on UML.
It "almost worked". In fact everything except "lttng start"
seems to work. I patched LTTng to fix the problem.

The problem took a few hours to find so I post this
just in case.


Best Regards,
Lars Ekman