A patch that allows each connection to have many user lock objects

Hello,

While I was on vacation, I wrote a patch for MySQL that allows each connection to own several user lock objects.
The patch is available here:

https://code.launchpad.net/~kostja/percona-server/userlock
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This is the last percona-server (5.5) + new user locks.

Read more about the patch in his blog .
I hope someone will be useful. I would be glad to comment on this feature.