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Johannes Weiner
2ce7135adc
On a system that executes multiple cgrouped jobs and independent workloads, we don't just care about the health of the overall system, but also that of individual jobs, so that we can ensure individual job health, fairness between jobs, or prioritize some jobs over others. This patch implements pressure stall tracking for cgroups. In kernels with CONFIG_PSI=y, cgroup2 groups will have cpu.pressure, memory.pressure, and io.pressure files that track aggregate pressure stall times for only the tasks inside the cgroup. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Johannes Weiner <[email protected]> Acked-by: Tejun Heo <[email protected]> Acked-by: Peter Zijlstra (Intel) <[email protected]> Tested-by: Daniel Drake <[email protected]> Tested-by: Suren Baghdasaryan <[email protected]> Cc: Christopher Lameter <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Johannes Weiner <[email protected]> Cc: Mike Galbraith <[email protected]> Cc: Peter Enderborg <[email protected]> Cc: Randy Dunlap <[email protected]> Cc: Shakeel Butt <[email protected]> Cc: Vinayak Menon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>