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| Filename | Latest commit message | Latest commit date |
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a09d5c52c4
NFP eBPF offload JIT engine is doing some instruction combine based optimizations which however must not be safe if the combined sequences are across basic block boarders. Currently, there are post checks during fixing jump destinations. If the jump destination is found to be eBPF insn that has been combined into another one, then JIT engine will raise error and abort. This is not optimal. The JIT engine ought to disable the optimization on such cross-bb-border sequences instead of abort. As there is no control flow information in eBPF infrastructure that we can't do basic block based optimizations, this patch extends the existing jump destination record pass to also flag the jump destination, then in instruction combine passes we could skip the optimizations if insns in the sequence are jump targets. Suggested-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Jiong Wang <jiong.wang@netronome.com> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.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.