> On Jun 15, 2020, at 1:56 PM, Luck, Tony <tony.luck@xxxxxxxxx> wrote: > > >> >> Are we planning to keep PASID live once a task has used it once or are we going to swap it lazily? If the latter, a percpu variable might be better. > > Current plan is "touch it once and the task owns it until exit(2)" > > Maybe someday in the future when we have data on how applications > actually use accelerators we could look at something more complex > if usage patterns look like it would be beneficial. > > So what’s the RDMSR for? Surely you have some state somewhere that says “this task has a PASID.” Can’t you just make sure that stays in sync with the MSR? Then, on #GP, if the task already has a PASID, you know the MSR is set. _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
