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Drivers: hv: vmbus: Implement NUMA aware CPU affinity for channels

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Channels/sub-channels can be affinitized to VCPUs in the guest. Implement
this affinity in a way that is NUMA aware. The current protocol distributed
the primary channels uniformly across all available CPUs. The new protocol
is NUMA aware: primary channels are distributed across the available NUMA
nodes while the sub-channels within a primary channel are distributed amongst
CPUs within the NUMA node assigned to the primary channel.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
K. Y. Srinivasan
2015-05-30 23:37:48 -07:00
committed by Greg Kroah-Hartman
parent 9c6e64adf2
commit 1f656ff3fd
2 changed files with 49 additions and 30 deletions
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5
include/linux/hyperv.h
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@@ -696,6 +696,11 @@ struct vmbus_channel {
u32 target_vp;
/* The corresponding CPUID in the guest */
u32 target_cpu;
/*
* State to manage the CPU affiliation of channels.
*/
struct cpumask alloced_cpus_in_node;
int numa_node;
/*
* Support for sub-channels. For high performance devices,
* it will be useful to have multiple sub-channels to support