Thread (18 messages) 18 messages, 4 authors, 1d ago

[PATCH net-next 02/11] netfilter: conntrack: fix nf_conntrack_expect_max default value in documentation

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From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: 2026-09-27 22:34:45
Also in: netfilter-devel
Subsystem: documentation, networking [general], the rest · Maintainers: Jonathan Corbet, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds

Revision v1 of 104 in this series.

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From: Shaojie Sun <redacted>

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 <redacted>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 Documentation/networking/nf_conntrack-sysctl.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/networking/nf_conntrack-sysctl.rst b/Documentation/networking/nf_conntrack-sysctl.rst
index 35f889259fcd..4426cce2a73f 100644
--- a/Documentation/networking/nf_conntrack-sysctl.rst
+++ b/Documentation/networking/nf_conntrack-sysctl.rst
@@ -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
-- 
2.47.3
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