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Diffstat (limited to 'changes/cbt-bugfixes')
| -rw-r--r-- | changes/cbt-bugfixes | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/changes/cbt-bugfixes b/changes/cbt-bugfixes new file mode 100644 index 000000000..31241c90e --- /dev/null +++ b/changes/cbt-bugfixes @@ -0,0 +1,33 @@ + o Major bugfixes: + - Ignore negative and large timeout values that can happen during a + suspend or hibernate. These values caused various asserts to fire + in the circuit build times code, crashing Tor. Bug 1245, bugfix on + 0.2.2.2-alpha. + - Alter calculation of Pareto distribution parameter 'Xm' for Circuit Build + Timeout learning to use the weighted average of the top N=3 modes. This + should improve the timeout calculation in some cases, and prevent + extremely high timeout values. Bug 1335, bugfix on 0.2.2.2-alpha. + - Alter calculation of Pareto distribution parameter 'Alpha' to use a + right censored distribution model. This allows us to remove the synthetic + timeout generation and instead calculate build timeouts using truncated + times. Bugs 1245+1335, bugfix on 0.2.2.2-alpha. + - Keep circuits open (but do not use them) after the circuit timeout for + up until the time corresponding to the 95th percentile on the Pareto CDF + or 60 seconds, whichever is greater. This is done to provide better data + for the new Pareto model. This percentile can be controlled by the + consensus. + + o Minor bugfixes: + - Eliminate a case where a circuit build time warning was displayed after + network connectivity resumed. Bugfix on 0.2.2.2-alpha. + + o Minor features: + - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port event, + to give information on the current rate of circuit timeouts over our + stored history. + - Add ability to disable circuit build time learning via consensus + parameter and via a LearnCircuitBuildTimeout config option. Also + automatically disable circuit build time calculation if we are either + a AuthoritativeDirectory, or if we fail to write our state file. Bug 1296. + + |