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Florian Westphal says: ==================== tcp: re-add header prediction Eric reported a performance regression caused by header prediction removal. We now call tcp_ack() much more frequently, for some workloads this brings in enough cache line misses to become noticeable. We could possibly still kill HP provided we find a different way to suppress unneeded tcp_ack, but given we're late in the cycle it seems preferable to revert. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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.