[SeaBIOS] SeaBIOS error with Juniper FreeBSD kernel

[Wayne Xia]

于 2011-8-4 7:48, Kevin O'Connor 写道:
> On Wed, Aug 03, 2011 at 02:42:15PM +0200, Bjørn Mork wrote:
>> But what if additional data is added to
>> the table, making f-segment allocation fail?  Then you will end up with
>> three different results depending on small changes instead of two:
>>
>>   1) nCPU<= 16 and f-segment allocation OK: SMBIOS in f-segment
>>   2) nCPU>  16: SMBIOS in high mem
>>   3) nCPU<= 16 and f-segment allocation failed: no SMBIOS table
>
> If a reasonable limit is placed on the size of the SMBIOS table then
> in practice the allocation will always succeed.
>
> All of the f-segment allocations with the exception of the mptable are
> small.  The mptable allocation should probably have an upper bound
> placed on it as well.  There's currently 2048 bytes reserved for
> malloc_fseg (CONFIG_MAX_BIOSTABLE), and the current smbios uses 263
> bytes with one cpu and 938 bytes with 16 cpus (memory size may also
> change size slightly).
>
> -Kevin
>
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In which situation would we allocate more that 16 VCPUS in qemu for 1
VM? I remember the performance is not very good when the number of
virtual CPU is more than the real number of host's, So could we just
put a limit about it, for a simple solution?

-- 
Best Regards

Wayne Xia
mail:xiawenc at linux.vnet.ibm.com
tel:86-010-82450803