Re: [RFC 0/4] memcg: Low-limit reclaim

2014-02-13 Thread Michal Hocko
On Wed 12-02-14 16:28:36, Roman Gushchin wrote: > Hi, Michal! > > Sorry for a long reply. > > At Wed, 29 Jan 2014 19:22:59 +0100, > Michal Hocko wrote: > > > As you can remember, I've proposed to introduce low limits about a year > > > ago. > > > > > > We had a small discussion at that time: >

Re: [RFC 0/4] memcg: Low-limit reclaim

2014-02-12 Thread Roman Gushchin
Hi, Michal! Sorry for a long reply. At Wed, 29 Jan 2014 19:22:59 +0100, Michal Hocko wrote: > > As you can remember, I've proposed to introduce low limits about a year ago. > > > > We had a small discussion at that time: http://marc.info/?t=13619522664 > > . > > yes I remember that discuss

Re: [RFC 0/4] memcg: Low-limit reclaim

2014-02-03 Thread Greg Thelen
On Mon, Feb 03 2014, Michal Hocko wrote: > On Thu 30-01-14 16:28:27, Greg Thelen wrote: >> On Thu, Jan 30 2014, Michal Hocko wrote: >> >> > On Wed 29-01-14 11:08:46, Greg Thelen wrote: >> > [...] >> >> The series looks useful. We (Google) have been using something similar. >> >> In practice such

Re: [RFC 0/4] memcg: Low-limit reclaim

2014-02-03 Thread Michal Hocko
On Thu 30-01-14 16:28:27, Greg Thelen wrote: > On Thu, Jan 30 2014, Michal Hocko wrote: > > > On Wed 29-01-14 11:08:46, Greg Thelen wrote: > > [...] > >> The series looks useful. We (Google) have been using something similar. > >> In practice such a low_limit (or memory guarantee), doesn't nest v

Re: [RFC 0/4] memcg: Low-limit reclaim

2014-01-30 Thread Greg Thelen
On Thu, Jan 30 2014, Michal Hocko wrote: > On Wed 29-01-14 11:08:46, Greg Thelen wrote: > [...] >> The series looks useful. We (Google) have been using something similar. >> In practice such a low_limit (or memory guarantee), doesn't nest very >> well. >> >> Example: >> - parent_memcg: limit 5

Re: [RFC 0/4] memcg: Low-limit reclaim

2014-01-30 Thread Michal Hocko
On Wed 29-01-14 11:08:46, Greg Thelen wrote: [...] > The series looks useful. We (Google) have been using something similar. > In practice such a low_limit (or memory guarantee), doesn't nest very > well. > > Example: > - parent_memcg: limit 500, low_limit 500, usage 500 > 1 privately charg

Re: [RFC 0/4] memcg: Low-limit reclaim

2014-01-29 Thread Greg Thelen
On Wed, Dec 11 2013, Michal Hocko wrote: > Hi, > previous discussions have shown that soft limits cannot be reformed > (http://lwn.net/Articles/555249/). This series introduces an alternative > approach to protecting memory allocated to processes executing within > a memory cgroup controller. It i

Re: [RFC 0/4] memcg: Low-limit reclaim

2014-01-29 Thread Michal Hocko
On Fri 24-01-14 15:07:02, Roman Gushchin wrote: > Hi, Michal! Hi, > As you can remember, I've proposed to introduce low limits about a year ago. > > We had a small discussion at that time: http://marc.info/?t=13619522664 . yes I remember that discussion and vaguely remember the proposed app

Re: [RFC 0/4] memcg: Low-limit reclaim

2014-01-24 Thread Roman Gushchin
Hi, Michal! As you can remember, I've proposed to introduce low limits about a year ago. We had a small discussion at that time: http://marc.info/?t=13619522664 . Since that time we intensively use low limits in our production (on thousands of machines). So, I'm very interested to merge thi

[RFC 0/4] memcg: Low-limit reclaim

2013-12-11 Thread Michal Hocko
Hi, previous discussions have shown that soft limits cannot be reformed (http://lwn.net/Articles/555249/). This series introduces an alternative approach to protecting memory allocated to processes executing within a memory cgroup controller. It is based on a new tunable that was discussed with Joh