[libvirt] [PATCH 1/5] vcpupin: introduce the new libvirt API (virDomainGetVcpupinInfo)
Eric Blake
eblake at redhat.com
Fri Jun 24 15:12:34 UTC 2011
On 06/24/2011 08:53 AM, Daniel Veillard wrote:
>>
>> +int virDomainGetVcpupinInfo (virDomainPtr domain,
>> + int maxinfo,
>> + unsigned char *cpumaps,
>> + int maplen,
>> + unsigned int flags);
>> +
>
> API looks fine to me
I'm not quite sure, yet.
>
> [...]
>> --- libvirt.orig/src/libvirt.c
>> +++ libvirt/src/libvirt.c
>> @@ -7087,6 +7087,75 @@ error:
>> }
>>
>> /**
>> + * virDomainGetVcpupinInfo:
>> + * @domain: pointer to domain object, or NULL for Domain0
>> + * @maxinfo: the number of cpumap
>> + * @cpumaps: pointer to a bit map of real CPUs for all vcpus of this
>> + * domain (in 8-bit bytes) (OUT)
>> + * It's assumed there is <maxinfo> cpumap in cpumaps array.
>> + * The memory allocated to cpumaps must be (maxinfo * maplen) bytes
>> + * (ie: calloc(maxinfo, maplen)).
>> + * One cpumap inside cpumaps has the format described in
>> + * virDomainPinVcpu() API.
>> + * Must not be NULL.
>> + * @maplen: the number of bytes in one cpumap, from 1 up to size of CPU map.
>> + * Must be positive.
>> + * @flags: an OR'ed set of virDomainModificationImpact
>> + * Must not be specified VIR_DOMAIN_AFFECT_LIVE and
>> + * VIR_DOMAIN_AFFECT_CONFIG concurrently!
>> + *
>> + * Query the CPU affinity setting of all virtual CPUs of domain, store it
>> + * in cpumaps.
>> + *
>> + * Returns the number of virtual CPUs in case of success,
>> + * -1 in case of failure.
>> + */
>> +int
>> +virDomainGetVcpupinInfo (virDomainPtr domain, int maxinfo,
>> + unsigned char *cpumaps, int maplen, unsigned int flags)
What is maxinfo for? The counterpart is:
virDomainGetVcpus(virDomainPtr domain, virVcpuInfoPtr info, int maxinfo,
unsigned char *cpumaps, int maplen)
where maxinfo relates to how large the 'info' array is. But
virDomainGetVcpupinInfo has no 'info' array.
>
> Okay ACK on the API principle from me,
I'm also reviewing the rest of this series.
--
Eric Blake eblake at redhat.com +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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