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abeeec4adf
Since XDP TX ring holds "spare" RX buffers anyway, we don't have to rush the completion. We can wait until ring fills up completely before trying to reclaim buffers. If RX poll has ended an no buffer has been queued for XDP TX we have no guarantee we will see another interrupt, so run the reclaim there as well, to make sure TX statistics won't become stale. This should help us reclaim more buffers per single queue controller register read. Note that the XDP completion is very trivial, it only adds up the sizes of transmitted frames for statistics so the latency spike should be acceptable. In case user sets the ring sizes to something crazy, limit the completion to 2k entries. The check if the ring is empty at the beginning of xdp_complete() is no longer needed - the callers will perform it. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.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.