[tor-commits] [tor] 06/09: Add changes file for bug40642.

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commit 9fb52305ee3109fee730148a7b9ed7dac6913273
Author: Mike Perry <mikeperry-git at torproject.org>
AuthorDate: Thu Aug 4 21:23:40 2022 +0000

    Add changes file for bug40642.
---
 changes/bug40642 | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/changes/bug40642 b/changes/bug40642
new file mode 100644
index 0000000000..f50d87e031
--- /dev/null
+++ b/changes/bug40642
@@ -0,0 +1,9 @@
+  o Major bugfixes (congestion control):
+    - Implement RFC3742 Limited Slow Start. Congestion control was
+      overshooting the congestion window during slow start, particularly for
+      onion service activity. With this fix, we now update the congestion
+      window more often during slow start, as well as dampen the exponential
+      growth when the congestion window grows above a capping parameter.
+      This should reduce the memory increases guard relays were seeing, as
+      well as allow us to set lower queue limits to defend against
+      ongoing DoS attacks. Fixes bug 40642; bugfix on 0.4.7.5-alpha.

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