kevin b95827f351 Added openstack_kernel options for gc_thresh ... This commit adds to the openstack_kernel_options to set the "net.ipv4/6.neigh.default.gc_thresh*" values according to how much ram is available on the box. How this is being defined: The change brings with it a filter to find the closest power of 2 from the amount of ram discovered on the target host. If facts are disabled when the role is called a default value of 1024 will be used. The `set_gc_val`, when computed, has a max value of 8192. For both ipv4/6 thresh1 is half the `set_gc_val` thresh2 is computed value, and finally both thresh3/router.gc_thresh are double the `set_gc_val`. The changes here should provide for a more scalable neutron networking environment by default while also ensuring that the values computed are sane. Additionallyi, should the user want to define their own values they can do so by simply overriding the `set_gc_val`. Change-Id: Ic5fd7ebdac009fa1472aeb0b0666f9b2611a31d7 Closes-Bug: #1427893		2015-07-09 10:20:31 -05:00
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osad-filters.py	Added openstack_kernel options for gc_thresh	2015-07-09 10:20:31 -05:00