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| author |   Eric Dumazet <edumazet@google.com> | 2021-09-22 19:26:43 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-09-23 12:50:26 +0100 |
| commit | d8b81175e412c7abebdb5b37d8a84d5fd19b1aad (patch) | |
| tree | 1976a34b63ebd315e6741ceb3bf582fe0e63a4bc /Documentation/networking/ip-sysctl.rst | |
| parent | tcp: make tcp_build_frag() static (diff) | |
| download | linux-dev-d8b81175e412c7abebdb5b37d8a84d5fd19b1aad.tar.xz linux-dev-d8b81175e412c7abebdb5b37d8a84d5fd19b1aad.zip | |
tcp: remove sk_{tr}x_skb_cache
This reverts the following patches :
- commit 2e05fcae83c4 ("tcp: fix compile error if !CONFIG_SYSCTL")
- commit 4f661542a402 ("tcp: fix zerocopy and notsent_lowat issues")
- commit 472c2e07eef0 ("tcp: add one skb cache for tx")
- commit 8b27dae5a2e8 ("tcp: add one skb cache for rx")
Having a cache of one skb (in each direction) per TCP socket is fragile,
since it can cause a significant increase of memory needs,
and not good enough for high speed flows anyway where more than one skb
is needed.
We want instead to add a generic infrastructure, with more flexible
per-cpu caches, for alien NUMA nodes.
Acked-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | Documentation/networking/ip-sysctl.rst | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst index d91ab28718d4..16b8bf72feaf 100644 --- a/Documentation/networking/ip-sysctl.rst +++ b/Documentation/networking/ip-sysctl.rst @@ -989,14 +989,6 @@ tcp_challenge_ack_limit - INTEGER in RFC 5961 (Improving TCP's Robustness to Blind In-Window Attacks) Default: 1000 -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 ============= |