[apparmor] [PATCH] Fix expr tree node labeling

[John Johansen]

On 07/07/2010 10:58 AM, John Johansen wrote:
> expression tree node labeling is used during debugging dumps.  Currently the node labels
> are computed and stored in a map, that is not cleaned up.  This means that the labeling
> is retained across different dfas.
> 
> Move the labeling into expr node as this takes less memory than using a map and will
> also separates node labeling so its per dfa instead of global.  In addition this means
> the labeling is cleanedup/freed when the expr tree is freed without any extra work.
> 
I would like to nominate this patch for 2.5.1 as it reduces peak memory usage, especially
for profiles with lots of hats as the labeling map grows with each hat added.