On Wed, Oct 27, 2010 at 04:37:38PM +0000, David Xu wrote: > Pawel Jakub Dawidek wrote: > >On Wed, Oct 27, 2010 at 10:49:12AM +0000, David Xu wrote: > >>I really hate to see such a problem that userland can not figure out > >>what kernel is using, I try hardly to guess, but still can not find > >>what it is using. yes, I think the doc may need to be fixed or > >>another syscall is needed. > > > >Maybe you could just add sysctl and eventually put it into sysconf(3)? > > > > I just found a dirty method, use sizeof(long) and kern.smp.maxcpus > 32 to figure out the size the kernel is using, because it is how > cpuset_t is constructed, wish it will never be changed. ;-) > I think that sysctl is the way forward, but you may add non-portable FreeBSD function to get the value, and use an ELF aux vector interface to avoid sysctl most of the time.
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