This patch series adds a number of features to improve read/write performance in the 9p filesystem. Mostly it is focused on fixing readahead caching to help utilize the recently increased MSIZE limits, but there are also some fixes for writeback caches in the presence of readahead and/or mmap operations. Altogether, these show roughly 10x speed increases on simple file transfer. Future patch sets will improve writeback cache behavior and directory caching. These patches are also available on github: https://github.com/v9fs/linux/tree/ericvh/9p-next-121722 Tested against qemu, cpu, and diod with fsx, dbench, and some simple benchmarks. Signed-off-by: Eric Van Hensbergen <evanhensbergen@xxxxxxxxxx>
