On Thu, 19 Nov 2020 12:14:13 +0000 Mel Gorman <mgorman@xxxxxxx> wrote: > * Usage of migrate_disable is heavily discouraged as it is extremely > * hazardous on PREEMPT_RT kernels and any usage needs to be heavily I don't believe it's just PREEMPT_RT. It's RT tasks that are concerned, especially when you are dealing with SCHED_DEADLINE. PREEMPT_RT just allows better determinism for RT tasks, but the issue with migrate_disable is not limited to just PREEMPT_RT. -- Steve > * justified. Before even thinking about using this, read > * "Migrate-Disable and why it is undesired" in > * include/linux/preempt.h and include both a comment and document > * in the changelog why the use case is an exception.
