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