diff options
Diffstat (limited to 'target/linux/generic/backport-5.4/080-wireguard-0131-wireguard-peer-allocate-in-kmem_cache.patch')
| -rw-r--r-- | target/linux/generic/backport-5.4/080-wireguard-0131-wireguard-peer-allocate-in-kmem_cache.patch | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/target/linux/generic/backport-5.4/080-wireguard-0131-wireguard-peer-allocate-in-kmem_cache.patch b/target/linux/generic/backport-5.4/080-wireguard-0131-wireguard-peer-allocate-in-kmem_cache.patch deleted file mode 100644 index 32ae327037..0000000000 --- a/target/linux/generic/backport-5.4/080-wireguard-0131-wireguard-peer-allocate-in-kmem_cache.patch +++ /dev/null @@ -1,125 +0,0 @@ -From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 -From: "Jason A. Donenfeld" <Jason@zx2c4.com> -Date: Fri, 4 Jun 2021 17:17:34 +0200 -Subject: [PATCH] wireguard: peer: allocate in kmem_cache - -commit a4e9f8e3287c9eb6bf70df982870980dd3341863 upstream. - -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: 8b5553ace83c ("wireguard: queueing: get rid of per-peer ring buffers") -Suggested-by: Arnd Bergmann <arnd@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> -Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> ---- - drivers/net/wireguard/main.c | 7 +++++++ - drivers/net/wireguard/peer.c | 21 +++++++++++++++++---- - drivers/net/wireguard/peer.h | 3 +++ - 3 files changed, 27 insertions(+), 4 deletions(-) - ---- a/drivers/net/wireguard/main.c -+++ b/drivers/net/wireguard/main.c -@@ -28,6 +28,10 @@ static int __init mod_init(void) - #endif - wg_noise_init(); - -+ ret = wg_peer_init(); -+ if (ret < 0) -+ goto err_peer; -+ - ret = wg_device_init(); - if (ret < 0) - goto err_device; -@@ -44,6 +48,8 @@ static int __init mod_init(void) - err_netlink: - wg_device_uninit(); - err_device: -+ wg_peer_uninit(); -+err_peer: - return ret; - } - -@@ -51,6 +57,7 @@ static void __exit mod_exit(void) - { - wg_genetlink_uninit(); - wg_device_uninit(); -+ wg_peer_uninit(); - } - - module_init(mod_init); ---- a/drivers/net/wireguard/peer.c -+++ b/drivers/net/wireguard/peer.c -@@ -15,6 +15,7 @@ - #include <linux/rcupdate.h> - #include <linux/list.h> - -+static struct kmem_cache *peer_cache; - static atomic64_t peer_counter = ATOMIC64_INIT(0); - - struct wg_peer *wg_peer_create(struct wg_device *wg, -@@ -29,10 +30,10 @@ struct wg_peer *wg_peer_create(struct wg - if (wg->num_peers >= MAX_PEERS_PER_DEVICE) - return ERR_PTR(ret); - -- peer = kzalloc(sizeof(*peer), GFP_KERNEL); -+ peer = kmem_cache_zalloc(peer_cache, GFP_KERNEL); - if (unlikely(!peer)) - return ERR_PTR(ret); -- if (dst_cache_init(&peer->endpoint_cache, GFP_KERNEL)) -+ if (unlikely(dst_cache_init(&peer->endpoint_cache, GFP_KERNEL))) - goto err; - - peer->device = wg; -@@ -64,7 +65,7 @@ struct wg_peer *wg_peer_create(struct wg - return peer; - - err: -- kfree(peer); -+ kmem_cache_free(peer_cache, peer); - return ERR_PTR(ret); - } - -@@ -193,7 +194,8 @@ static void rcu_release(struct rcu_head - /* The final zeroing takes care of clearing any remaining handshake key - * material and other potentially sensitive information. - */ -- kzfree(peer); -+ memzero_explicit(peer, sizeof(*peer)); -+ kmem_cache_free(peer_cache, peer); - } - - static void kref_release(struct kref *refcount) -@@ -225,3 +227,14 @@ void wg_peer_put(struct wg_peer *peer) - return; - kref_put(&peer->refcount, kref_release); - } -+ -+int __init wg_peer_init(void) -+{ -+ peer_cache = KMEM_CACHE(wg_peer, 0); -+ return peer_cache ? 0 : -ENOMEM; -+} -+ -+void wg_peer_uninit(void) -+{ -+ kmem_cache_destroy(peer_cache); -+} ---- a/drivers/net/wireguard/peer.h -+++ b/drivers/net/wireguard/peer.h -@@ -80,4 +80,7 @@ void wg_peer_put(struct wg_peer *peer); - void wg_peer_remove(struct wg_peer *peer); - void wg_peer_remove_all(struct wg_device *wg); - -+int wg_peer_init(void); -+void wg_peer_uninit(void); -+ - #endif /* _WG_PEER_H */ |