Jason A. Donenfeld a4e9f8e328
wireguard: peer: allocate in kmem_cache ...
With deployments having upwards of 600k peers now, this somewhat heavy
structure could benefit from more fine-grained allocations.
Specifically, instead of using a 2048-byte slab for a 1544-byte object,
we can now use 1544-byte objects directly, thus saving almost 25%
per-peer, or with 600k peers, that's a savings of 303 MiB. This also
makes wireguard's memory usage more transparent in tools like slabtop
and /proc/slabinfo.
Fixes: 8b5553ace8arnd@arndb.de >
Suggested-by: Matthew Wilcox <willy@infradead.org >
Cc: stable@vger.kernel.org
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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