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| author | K. Y. Srinivasan <kys@microsoft.com> | 2014-04-08 18:45:54 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-03 19:24:26 -0400 |
| commit | 3a28fa35d6658703cd26f9c16aaea0eae06afd40 (patch) | |
| tree | bcc8f07bbd9365e0a270c85af0e50ce3e1682987 /include/linux/hyperv.h | |
| parent | d3ba720dd58cdf6630fee4b89482c465d5ad0d0f (diff) | |
| download | linux-3a28fa35d6658703cd26f9c16aaea0eae06afd40.tar.gz linux-3a28fa35d6658703cd26f9c16aaea0eae06afd40.tar.bz2 linux-3a28fa35d6658703cd26f9c16aaea0eae06afd40.zip | |
Drivers: hv: vmbus: Implement per-CPU mapping of relid to channel
Currently the mapping of the relID to channel is done under the protection of a
single spin lock. Starting with ws2012, each channel is bound to a specific VCPU
in the guest. Use this binding to eliminate the spin lock by setting up
per-cpu state for mapping relId to the channel.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/hyperv.h')
| -rw-r--r-- | include/linux/hyperv.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index a274e089df78..08cfaff8a072 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -734,6 +734,11 @@ struct vmbus_channel { * Support per-channel state for use by vmbus drivers. */ void *per_channel_state; + /* + * To support per-cpu lookup mapping of relid to channel, + * link up channels based on their CPU affinity. + */ + struct list_head percpu_list; }; static inline void set_channel_read_state(struct vmbus_channel *c, bool state) |