diff options
| author | Eric Dumazet <edumazet@google.com> | 2022-05-15 21:24:55 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-05-16 11:33:59 +0100 |
| commit | 39564c3fdc6684c6726b63e131d2a9f3809811cb (patch) | |
| tree | 523592ac216cfcc1bbbb560b953d2d99b8e13186 /net/core/sysctl_net_core.c | |
| parent | 2db60eed1a957423cf06ee1060fc45ed3971990d (diff) | |
net: add skb_defer_max sysctl
commit 68822bdf76f1 ("net: generalize skb freeing
deferral to per-cpu lists") added another per-cpu
cache of skbs. It was expected to be small,
and an IPI was forced whenever the list reached 128
skbs.
We might need to be able to control more precisely
queue capacity and added latency.
An IPI is generated whenever queue reaches half capacity.
Default value of the new limit is 64.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/sysctl_net_core.c')
| -rw-r--r-- | net/core/sysctl_net_core.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c index 195ca5c28771..ca8d38325e1e 100644 --- a/net/core/sysctl_net_core.c +++ b/net/core/sysctl_net_core.c @@ -578,6 +578,14 @@ static struct ctl_table net_core_table[] = { .extra1 = SYSCTL_ONE, .extra2 = &int_3600, }, + { + .procname = "skb_defer_max", + .data = &sysctl_skb_defer_max, + .maxlen = sizeof(unsigned int), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = SYSCTL_ZERO, + }, { } }; |