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o Major bugfixes:
- When we have too much memory queued in circuits (according to a new
MaxMemInCellQueues option), close the circuits consuming the most
memory. This prevents us from running out of memory as a relay if
circuits fill up faster than they can be drained. Fixes
bug 9063; bugfix on the 54th commit of Tor. This bug is a further
fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
Also fixes an earlier approach taken in 0.2.4.13-alpha, where we
tried to solve this issue simply by imposing an upper limit on the
number of queued cells for a single circuit. That approach proved to
be problematic, since there are ways to provoke clients to send a
number of cells in excess of any such reasonable limit.
Fixes bug 9072; bugfix on 0.2.4.13-alpha.
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