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netfilter: conntrack: fix nf_conntrack_expect_max default value in documentation

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The documentation for nf_conntrack_expect_max incorrectly states that the
default value is nf_conntrack_buckets / 256. However, the code in
nf_conntrack_expect_init() shows:

    nf_ct_expect_hsize = nf_conntrack_htable_size / 256;
    nf_ct_expect_max = nf_ct_expect_hsize * 4;

This means the default value is actually nf_conntrack_buckets / 64
(i.e. 4 times the hash table size, which defaults to
nf_conntrack_buckets / 256).

Fix the documentation to reflect the correct default value and add
explanation of the calculation.

Signed-off-by: Shaojie Sun <sunshaojie@kylinos.cn>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Shaojie Sun 2026-08-20 20:57:18 +08:00 committed by Pablo Neira Ayuso
parent a8708aa9fe
commit 409df11c56
1 changed files with 1 additions and 1 deletions
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2
Documentation/networking/nf_conntrack-sysctl.rst
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@ -44,7 +44,7 @@ nf_conntrack_events - BOOLEAN
nf_conntrack_expect_max - INTEGER
Maximum size of expectation table. Default value is
nf_conntrack_buckets / 256. Minimum is 1.
nf_conntrack_buckets / 64. Minimum is 1.
nf_conntrack_frag6_high_thresh - INTEGER
default 262144