https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=241927
Bug ID: 241927
Summary: kernel crash in
kern_cpuset_setdomain(CPU_LEVEL_CPUSET, CPU_WHICH_PID,
-1, ...)
Product: Base System
Version: 12.0-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: b...@freebsd.org
Reporter: bgog...@free.fr
Created attachment 209111
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=209111&action=edit
screenshot of the backtrace of the crash
Hello
While adding FreeBSD NUMA support in hwloc, we found a reproducible way to
crash the kernel. Just call cpuset_setdomain(CPU_LEVEL_CPUSET, CPU_WHICH_PID,
-1, ...).
Here's the minimalistic userland program to reproduce:
#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/param.h>
#include <sys/cpuset.h>
#include <sys/domainset.h>
int main()
{
domainset_t mask;
DOMAINSET_ZERO(&mask);
DOMAINSET_SET(0, &mask);
cpuset_setdomain(CPU_LEVEL_CPUSET, CPU_WHICH_PID, -1, sizeof(mask),
&mask, DOMAINSET_POLICY_PREFER);
}
I don't understand what this call is supposed to do, we actually wanted to use
CPU_LEVEL_WHICH instead of CPU_LEVEL_CPUSET :)
We were running this inside a KVM VM with 4 NUMA domains but the crash also
occurs without multiple NUMA domains.
I am attaching a screenshot of the backtrace after the crash. I don't know how
to debug more.
Brice
--
You are receiving this mail because:
You are the assignee for the bug.
_______________________________________________
freebsd-bugs@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/freebsd-bugs
To unsubscribe, send any mail to "freebsd-bugs-unsubscr...@freebsd.org"
