svn commit: r196270 - in stable/8/sys: . amd64/include/xen cddl/contrib/opensolaris contrib/dev/acpica contrib/pf dev/ata dev/cxgb dev/xen/netfront dev/xen/xenpci ia64/ia64 modules/dtrace/dtnfsclie...

[Marcel Moolenaar]

On Aug 16, 2009, at 2:41 AM, Attilio Rao wrote:

> 2009/8/16 Marcel Moolenaar <xcllnt at mac.com>:
>>
>> On Aug 15, 2009, at 7:19 PM, Attilio Rao wrote:
>>
>>> 2009/8/16 Marcel Moolenaar <marcel at freebsd.org>:
>>>>
>>>> Author: marcel
>>>> Date: Sun Aug 16 02:12:13 2009
>>>> New Revision: 196270
>>>> URL: http://svn.freebsd.org/changeset/base/196270
>>>>
>>>> Log:
>>>> MFC rev 196268:
>>>> Decouple ACPI CPU Ids from FreeBSD's cpuid. The ACPI Ids can be
>>>> sparse, which causes a kernel assert.
>>>
>>> Can you be a bit more precise?
>>> What kernel assert?
>>
>> In subr_smp.c, function smp_topo():
>>   panic("Built bad topology at %p.  CPU mask 0x%X != 0x%X",
>>       top, top->cg_mask, all_cpus);
>>
>> See also:
>> http://docs.freebsd.org/cgi/getmsg.cgi?fetch=506001+0+archive/2009/freebsd-current/20090719.freebsd-current
>> http://docs.freebsd.org/cgi/getmsg.cgi?fetch=626164+0+archive/2009/freebsd-current/20090719.freebsd-current
>
> lThat's very interesting. That probabilly means we will end without
> any sparse CPUs IDs on all architectures?

Yes. It also means that hot-swap CPUs are impossible to
support for reasons that are unrelated to the technical
problems of managing the appearance and disappearance
of CPUs.

-- 
Marcel Moolenaar
xcllnt at mac.com