Re: [linux-pm] Re: [PATCH] Remove process freezer from suspend to RAM pathway

Rafael J. Wysocki
2007-07-05T13:16:31Z

On Thursday, 5 July 2007 13:54, Miklos Szeredi wrote:
> > > Limiting what a userspace filesystem can do would defeat the whole
> > > purpose of the bloody thing. This is not negotiable ;)
> >
> > Which doesn't change the fact that FUSE _is_ special, because it adds
> > dependencies between processed that were not present before.
>
> OK, fuse is special. So is the userspace driver framework (UIO)
> proposed by Greg KH and co. Now what can be done about these?
>
> - making them not-special is not an option due to the established
> interfaces, which don't allow restartability.
>
> - fixing the freezer is pretty much impossible because the
> dependencies between the tasks cannot be known.
>
> - removing the freezer and fixing the drivers seems workable, we
> already have a prototype in the form of the powermac architecture.
>
> It seems pretty clear cut. Whining about how much problems this will
> cause won't get us nearer to a solution.

Yes, that's pretty clear cut, but we should start from fixing the drivers. :-)

Greetings,
Rafael

--
"Premature optimization is the root of all evil." - Donald Knuth