Am 09.09.2015 um 20:35 schrieb Alexander Holler:
Hello, as already mentioned, I've implemented the stuff to initialize drivers in parallel. What follows are two patches to be used on top of my already posted series (for 4.2) which implements annotated initcalls and DT based dependencies. But be warned: many drivers which are in the same initcall level still depend on the link order given by the Makefile and directoy (-name) and therefor will fail. That means without moving them to other initcall levels or explicit dependencies (which are a TODO) for these drivers, the whole stuff currently works only for some configurations and you likely will need to add several patches for your board.
Another update: I've now did what I've described as TODO above. That means I have everything working to parallelize the (whole) init-system regardless the arch or DT/ACPI or whatever.
Cleaning up the new stuff to post it here will need some time. And collecting the _mandatory_ dependencies to parallelize all static linked drivers (from all initcall levels) will need much more time. Even on systems where most stuff is build as a module, the list of drivers initialized through initcalls is usually several dozens or even hundreds. You might use 'grep initcall_ System.map | wc -l' to get an idea.
Therefor I don't know when I will post cleaned up patches and/or some benchmark times. The interest seems rather low.
Regards, Alexander Holler -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
