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authorAmir Vadai <amirv@mellanox.com>2014-05-25 18:47:26 +0400
committerDavid S. Miller <davem@davemloft.net>2014-06-02 06:16:29 +0400
commitc8865b64b05b2f4eeefd369373e9c8aeb069e7a1 (patch)
treefef93ad82529c709aeb8d15fb4330631918698d9 /Documentation/CodingStyle
parent90d0e08e574d1aa8553ee6179fcf3bf2b333ca6d (diff)
downloadlinux-c8865b64b05b2f4eeefd369373e9c8aeb069e7a1.tar.xz
cpumask: Utility function to set n'th cpu - local cpu first
This function sets the n'th cpu - local cpu's first. For example: in a 16 cores server with even cpu's local, will get the following values: cpumask_set_cpu_local_first(0, numa, cpumask) => cpu 0 is set cpumask_set_cpu_local_first(1, numa, cpumask) => cpu 2 is set ... cpumask_set_cpu_local_first(7, numa, cpumask) => cpu 14 is set cpumask_set_cpu_local_first(8, numa, cpumask) => cpu 1 is set cpumask_set_cpu_local_first(9, numa, cpumask) => cpu 3 is set ... cpumask_set_cpu_local_first(15, numa, cpumask) => cpu 15 is set Curently this function will be used by multi queue networking devices to calculate the irq affinity mask, such that as many local cpu's as possible will be utilized to handle the mq device irq's. Signed-off-by: Amir Vadai <amirv@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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