On 02/23/2011 10:20 AM, Daniel P. Berrange wrote:
Using the 'personality(2)' system call, we can make a container on an x86_64 host appear to be i686. Likewise for most other Linux 64bit arches.
* src/lxc/lxc_conf.c: Fill in 32bit capabilities for x86_64 hosts * src/lxc/lxc_container.h, src/lxc/lxc_container.c: Add API to check if an arch has a 32bit alternative * src/lxc/lxc_controller.c: Set the process personality when starting guest
@@ -73,7 +75,7 @@ virCapsPtr lxcCapsInit(void) if ((guest = virCapabilitiesAddGuest(caps, "exe", utsname.machine, - sizeof(int) == 4 ? 32 : 8, + sizeof(void*) == 4 ? 32 : 64,
How long have we had that bug? Thankfully, sizeof(int) is 4 on both 32-bit and 64-bit Linux, so we were never setting 8 as the number of bits per CPU word. This fix alone is worth the patch. ACK. -- Eric Blake eblake@redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org