Re: [PATCH 4/4] memcg: Document memory.low_limit_in_bytes

Michal Hocko
2014-05-02T09:46:25Z

On Wed 30-04-14 18:57:48, Johannes Weiner wrote:
> On Mon, Apr 28, 2014 at 02:26:45PM +0200, Michal Hocko wrote:
> > Describe low_limit_in_bytes and its effect.
> >
> > Signed-off-by: Michal Hocko <mhocko@suse.cz>
> > ---
> > Documentation/cgroups/memory.txt | 9 +++++++++
> > 1 file changed, 9 insertions(+)
> >
> > diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt
> > index add1be001416..a52913fe96fb 100644
> > --- a/Documentation/cgroups/memory.txt
> > +++ b/Documentation/cgroups/memory.txt
> > @@ -57,6 +57,7 @@ Brief summary of control files.
> > memory.memsw.usage_in_bytes # show current res_counter usage for memory+Swap
> > (See 5.5 for details)
> > memory.limit_in_bytes # set/show limit of memory usage
> > + memory.low_limit_in_bytes # set/show low limit for memory reclaim
> > memory.memsw.limit_in_bytes # set/show limit of memory+Swap usage
> > memory.failcnt # show the number of memory usage hits limits
> > memory.memsw.failcnt # show the number of memory+Swap hits limits
> > @@ -249,6 +250,14 @@ is the objective of the reclaim. The global reclaim aims at balancing
> > zones' watermarks while the limit reclaim frees some memory to allow new
> > charges.
> >
> > +Groups might be also protected from both global and limit reclaim by
> > +low_limit_in_bytes knob. If the limit is non-zero the reclaim logic
> > +doesn't include groups (and their subgroups - see 6. Hierarchy support)
> > +which are bellow the low limit if there is other eligible cgroup in the
>
> 'below' :-) Although I really like that spello.

ups
--
Michal Hocko
SUSE Labs