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

Miklos Szeredi
2007-07-03T10:47:55Z

> > So to summarize, the plan that makes things work with fuse is:
> >
> >  - For STR, don't do the freezer thing.
> >
> >  - For STD, don't sys_sync() after you froze
> >
> > There might be -other- issues, but that should get you through some of
>
> At the risk of repeating myself. Character device drivers are written
> with the assumption that normal io and suspend/resume do not race
> with each other due to the freezer.
> What do you intend to do about that?

Oliver, can you please explain your worries in a bit more detail?

I don't claim to know anything about how STR or hibernate works, but
neither seem to have any problem with I/O on the fuse device "racing"
with them.

And conceptually I can't see anything that would cause trouble either.
The fuse kernel module just provides a specialized IPC mechanism,
where one userspace process communicates with another using file
operations and a char dev.

Miklos