Re: powerpc/opal: Wake up kopald polling thread before waiting for events
From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2016-07-11 10:19:36
On Mon, 2016-04-07 at 04:51:44 UTC, Benjamin Herrenschmidt wrote:
On some environments (prototype machines, some simulators, etc...) there is no functional interrupt source to signal completion, so we rely on the fairly slow OPAL heartbeat. In a number of cases, the calls complete very quickly or even immediately. We've observed that it helps a lot to wakeup the OPAL heartbeat thread before waiting for event in those cases, it will call OPAL immediately to collect completions for anything that finished fast enough. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-By: Michael Neuling <redacted>
Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/a203658b5ed37c11e5016d3fbb cheers