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| author | Eric Dumazet <edumazet@google.com> | 2019-06-15 01:22:19 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-06-15 05:18:28 +0200 |
| commit | ede61ca474a0348b975d9824565b66c7595461de (patch) | |
| tree | bc0770bb86ede5aed3f91f68773e412ee1067d07 /Documentation/networking/ip-sysctl.txt | |
| parent | sysctl: define proc_do_static_key() (diff) | |
| download | linux-ede61ca474a0348b975d9824565b66c7595461de.tar.xz linux-ede61ca474a0348b975d9824565b66c7595461de.zip | |
tcp: add tcp_rx_skb_cache sysctl
Instead of relying on rps_needed, it is safer to use a separate
static key, since we do not want to enable TCP rx_skb_cache
by default. This feature can cause huge increase of memory
usage on hosts with millions of sockets.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking/ip-sysctl.txt')
| -rw-r--r-- | Documentation/networking/ip-sysctl.txt | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index 14fe93049d28..288aa264ac26 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -772,6 +772,14 @@ tcp_challenge_ack_limit - INTEGER in RFC 5961 (Improving TCP's Robustness to Blind In-Window Attacks) Default: 100 +tcp_rx_skb_cache - BOOLEAN + Controls a per TCP socket cache of one skb, that might help + performance of some workloads. This might be dangerous + on systems with a lot of TCP sockets, since it increases + memory usage. + + Default: 0 (disabled) + UDP variables: udp_l3mdev_accept - BOOLEAN |