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| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2021-05-20 14:36:41 +0200 |
|---|---|---|
| committer | Michael Bestas <mkbestas@lineageos.org> | 2021-07-23 02:44:47 +0300 |
| commit | f6bcc677e7db3d8a39dfaa73c4a17fc4fb3f984b (patch) | |
| tree | af5b09eb4c7a07d7b3744da05cccc4046f9d04dc /scripts/patch-kernel | |
| parent | d6e91ca8541bfeb4b5cee5b3d48627af466a96f1 (diff) | |
allowedips: allocate nodes in kmem_cache
The previous commit moved from O(n) to O(1) for removal, but in the
process introduced an additional pointer member to a struct that
increased the size from 60 to 68 bytes, putting nodes in the 128-byte
slab. With deployed systems having as many as 2 million nodes, this
represents a significant doubling in memory usage (128 MiB -> 256 MiB).
Fix this by using our own kmem_cache, that's sized exactly right. This
also makes wireguard's memory usage more transparent in tools like
slabtop and /proc/slabinfo.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Suggested-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Change-Id: Iabf9dabe6a6a36aceff23e3021d51c079c9525e4
Diffstat (limited to 'scripts/patch-kernel')
0 files changed, 0 insertions, 0 deletions