diff options
Diffstat (limited to 'Documentation/networking/nf_conntrack-sysctl.rst')
| -rw-r--r-- | Documentation/networking/nf_conntrack-sysctl.rst | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/Documentation/networking/nf_conntrack-sysctl.rst b/Documentation/networking/nf_conntrack-sysctl.rst index 024d784157c8..de3815dd4d49 100644 --- a/Documentation/networking/nf_conntrack-sysctl.rst +++ b/Documentation/networking/nf_conntrack-sysctl.rst @@ -17,9 +17,8 @@ nf_conntrack_acct - BOOLEAN nf_conntrack_buckets - INTEGER Size of hash table. If not specified as parameter during module loading, the default size is calculated by dividing total memory - by 16384 to determine the number of buckets but the hash table will - never have fewer than 32 and limited to 16384 buckets. For systems - with more than 4GB of memory it will be 65536 buckets. + by 16384 to determine the number of buckets. The hash table will + never have fewer than 1024 and never more than 262144 buckets. This sysctl is only writeable in the initial net namespace. nf_conntrack_checksum - BOOLEAN @@ -100,8 +99,12 @@ nf_conntrack_log_invalid - INTEGER Log invalid packets of a type specified by value. nf_conntrack_max - INTEGER - Size of connection tracking table. Default value is - nf_conntrack_buckets value * 4. + Maximum number of allowed connection tracking entries. This value is set + to nf_conntrack_buckets by default. + Note that connection tracking entries are added to the table twice -- once + for the original direction and once for the reply direction (i.e., with + the reversed address). This means that with default settings a maxed-out + table will have a average hash chain length of 2, not 1. nf_conntrack_tcp_be_liberal - BOOLEAN - 0 - disabled (default) |