from mysql-trunk:

# committer: Alexander Nozdrin <alexander.nozdrin@oracle.com>
# timestamp: Mon 2012-09-17 16:39:22 +0400
# message:
#   A patch for Bug#14620456 (TESTS FAIL WITH THE "THREAD STACK OVERRUN" MESSAGE).
#
#   The problem was that the default thread stack is not enough for some tests to pass
#   on certain platforms (especially SPARC64).
#
#   The patch adds a way to override thread stack size for a particular platform.