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Aniket Gattani
03240f5de2
Add a new stress test to exercise the interaction between targeted expedited membarrier commands and CFS bandwidth throttling. The test creates a deep cgroup hierarchy and aggressively hammers the membarrier syscall to expose lock contention and latency issues. This serves as a reliable reproducer for the `membarrier_ipi_mutex` cascade lockup, ensuring future changes to membarrier locking do not regress targeted command latency. Closes: https://lore.kernel.org/r/202604151516.Vc7Ro4LP-lkp@intel.com/ Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Aniket Gattani <aniketgattani@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://patch.msgid.link/20260503212205.3714217-4-aniketgattani@google.com