title: Trace slow vfs opens.
name: slowvfs.stp
keywords: io simple
description: This script prints a line for every kernel vfs_open operation that takes longer than a configurable number of microseconds.  Highly contended or remote filesystems are likelier to hit this.
test_support: stap -l 'vfs.open.return'
test_check: stap -p4 slowvfs.stp
test_installcheck: stap slowvfs.stp -G sloth=10 -c 'find /proc >/dev/null || true'