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Our hardware does not allow situations where two filters might conflict when matching. Essentially hardware only programs one filter for each set of matching criteria. We don't support filters with overlapping input sets, because each flow type can only use a single input set. Additionally, different flow types will never have overlapping matches, because of how the hardware parses the flow type before checking matching criteria. For this reason, we do not need or use the location number when programming filters to hardware. In order to avoid confusing scenarios with filters that match the same criteria but program the flow to different queues, do not allow multiple filters that match identical criteria to be programmed. This ensures that we avoid odd scenarios when deleting filters, and when programming new filters that match the same criteria. Instead, users that wish to update the criteria for a filter must use the same location id, or must delete all the matching filters first. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> |
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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.