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Subject[PATCH] Improve 9p performance for read operations
Date
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@icloud.com>


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