[Devel] Re: [PATCH 2/4] cgroup freezer: Avoid lazy state changes when convenient

[Serge E. Hallyn]

Quoting Matt Helsley (matthltc at us.ibm.com):
> On Wed, Jun 03, 2009 at 11:10:46AM -0500, Serge E. Hallyn wrote:
> > Quoting Matt Helsley (matthltc at us.ibm.com):
> > >  When all the tasks of a cgroup were successfully frozen we can avoid
> > >  the lazy FREEZING -> FROZEN transition and move into FROZEN during the
> > >  write to freezer.state.
> > 
> > Can you remind us then what the point of the FREEZING state is?
> > It doesn't look to me like, after this patch, a cgroup will
> > ever be FREEZING?
> 
> FREEZING is an intermediate state indicating that the cgroup is
> partially frozen and, unless userspace retries, it will remain so. 

Oh, so basically a cgroup will be in CGROUP_FREEZING state only
while try_to_freeze_cgroup() is looping over the tasks now?

-serge
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