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diff --git a/doc/tor.1.txt b/doc/tor.1.txt
index 26e788230..08da24d3c 100644
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@@ -1222,28 +1222,43 @@ The following options are useful only for clients (that is, if
**PathBiasNoticeRate** __NUM__ +
-**PathBiasDisableRate** __NUM__ +
+**PathBiasWarnRate** __NUM__ +
+
+**PathBiasExtremeRate** __NUM__ +
+
+**PathBiasDropGuards** __NUM__ +
**PathBiasScaleThreshold** __NUM__ +
-**PathBiasScaleFactor** __NUM__::
+**PathBiasMultFactor** __NUM__ +
+
+**PathBiasScaleFactor** __NUM__ +
+
+**PathBiasUseCloseCounts** __NUM__::
These options override the default behavior of Tor's (**currently
experimental**) path bias detection algorithm. To try to find broken or
misbehaving guard nodes, Tor looks for nodes where more than a certain
- fraction of circuits through that node fail after the first hop. The
- PathBiasCircThreshold option controls how many circuits we need to build
- through a guard before we make these checks. The PathBiasNoticeRate and
- PathBiasDisableRate options control what fraction of circuits must
- succeed through a guard so we won't warn about it or disable it,
- respectively. When we have seen more than PathBiasScaleThreshold
- circuits through a guard, we divide our observations by
- PathBiasScaleFactor, so that new observations don't get swamped by old
- ones. +
+ fraction of circuits through that guard fail to get built. If
+ PathBiasUseCloseCounts is set to 1 (the default), usage-based accounting is
+ performed, and circuits that fail to carry streams are also counted as
+ failures. +
+ +
+ The PathBiasCircThreshold option controls how many circuits we need to build
+ through a guard before we make these checks. The PathBiasNoticeRate,
+ PathBiasWarnRate and PathBiasExtremeRate options control what fraction of
+ circuits must succeed through a guard so we won't write log messages.
+ If less than PathBiasExtremeRate circuits succeed *and* PathBiasDropGuards
+ is set to 1, we disable use of that guard. +
+ +
+ When we have seen more than PathBiasScaleThreshold
+ circuits through a guard, we scale our observations by
+ PathBiasMultFactor/PathBiasScaleFactor, so that new observations don't get
+ swamped by old ones. +
+
By default, or if a negative value is provided for one of these options,
Tor uses reasonable defaults from the networkstatus consensus document.
- If no defaults are available there, these options default to 20, .70,
- 0.0, 200, and 4 respectively.
+ If no defaults are available there, these options default to 150, .70,
+ .50, .30, 0, 300, 1, and 2 respectively.
**ClientUseIPv6** **0**|**1**::
If this option is set to 1, Tor might connect to entry nodes over