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2021-09-16tools/rcu: Add an extract-stall scriptPaul E. McKenney
This commit adds a script that extracts RCU CPU stall warnings from console output. The user can optionally specify the number of lines preceding the stall to output, and also the number of lines of stall-warning text. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>