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The number of LPM trees available for lookup is much smaller than the number of virtual routers, which are used to implement VRFs. In addition, an LPM tree can only be used by one protocol - either IPv4 or IPv6. Therefore, in order to increase the number of supported virtual routers to the maximum we need to be able to share LPM trees across virtual routers instead of trying to find an optimized tree for each. Do that by allocating one LPM tree for each protocol, but make sure it will only include prefixes that are actually used, so as to not perform unnecessary lookups. Since changing the structure of a bound tree isn't recommended, whenever a new tree it required, it's first created and then bound to each virtual router, replacing the old one. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.