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| 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/dev.c | |
| parent | net: use napi_consume_skb() in skb_defer_free_flush() (diff) | |
| download | linux-dev-39564c3fdc6684c6726b63e131d2a9f3809811cb.tar.xz linux-dev-39564c3fdc6684c6726b63e131d2a9f3809811cb.zip | |
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/dev.c')
| -rw-r--r-- | net/core/dev.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index d0b34bc50706..6359f8953269 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -4330,6 +4330,7 @@ int netdev_max_backlog __read_mostly = 1000; EXPORT_SYMBOL(netdev_max_backlog); int netdev_tstamp_prequeue __read_mostly = 1; +unsigned int sysctl_skb_defer_max __read_mostly = 64; int netdev_budget __read_mostly = 300; /* Must be at least 2 jiffes to guarantee 1 jiffy timeout */ unsigned int __read_mostly netdev_budget_usecs = 2 * USEC_PER_SEC / HZ; |