On Fri, Nov 30, 2012 at 03:47:25PM -0200, Luiz Capitulino wrote:
[...]
> > Query-and-control scheme looks very attractive, and that's actually
> > resembles my "balance" level idea, when userland tells the kernel how much
> > reclaimable memory it has. Except the your scheme works in the reverse
>
Hi Luiz,
Thanks for your email!
On Fri, Nov 30, 2012 at 03:47:25PM -0200, Luiz Capitulino wrote:
[...]
> > But there is one, rather major issue: we're crossing kernel-userspace
> > boundary. And with the scheme we'll have to cross the boundary four times:
> > query / reply-available / control / r
On Wed, 28 Nov 2012 17:27:51 -0800
Anton Vorontsov wrote:
> On Wed, Nov 28, 2012 at 03:14:32PM -0800, Andrew Morton wrote:
> [...]
> > Compare this with the shrink_slab() shrinkers. With these, the VM can
> > query and then control the clients. If something goes wrong or is out
> > of balance,
On Thu, Nov 29, 2012 at 08:14:13AM +0200, Kirill A. Shutemov wrote:
> On Wed, Nov 28, 2012 at 02:29:08AM -0800, Anton Vorontsov wrote:
> > +static int mpc_pre_destroy(struct cgroup *cg)
> > +{
> > + struct mpc_state *mpc = cg2mpc(cg);
> > + int ret = 0;
> > +
> > + mutex_lock(&mpc->lock);
> >
On Wed, Nov 28, 2012 at 02:29:08AM -0800, Anton Vorontsov wrote:
> +static int mpc_pre_destroy(struct cgroup *cg)
> +{
> + struct mpc_state *mpc = cg2mpc(cg);
> + int ret = 0;
> +
> + mutex_lock(&mpc->lock);
> +
> + if (mpc->eventfd)
> + ret = -EBUSY;
cgroup_rmdir() wil
Hello Michal,
Thanks a lot for taking a look into this!
On Wed, Nov 28, 2012 at 05:29:24PM +0100, Michal Hocko wrote:
> On Wed 28-11-12 02:29:08, Anton Vorontsov wrote:
> > This is an attempt to implement David Rientjes' idea of mempressure
> > cgroup.
> >
> > The main characteristics are the sa
On Wed, Nov 28, 2012 at 05:27:51PM -0800, Anton Vorontsov wrote:
> On Wed, Nov 28, 2012 at 03:14:32PM -0800, Andrew Morton wrote:
> [...]
> > Compare this with the shrink_slab() shrinkers. With these, the VM can
> > query and then control the clients. If something goes wrong or is out
> > of bala
On Wed, Nov 28, 2012 at 03:14:32PM -0800, Andrew Morton wrote:
[...]
> Compare this with the shrink_slab() shrinkers. With these, the VM can
> query and then control the clients. If something goes wrong or is out
> of balance, it's the VM's problem to solve.
>
> So I'm thinking that a better des
On Wed, 28 Nov 2012 02:29:08 -0800
Anton Vorontsov wrote:
> The main characteristics are the same to what I've tried to add to vmevent
> API:
>
> Internally, it uses Mel Gorman's idea of scanned/reclaimed ratio for
> pressure index calculation. But we don't expose the index to the
> userla
On Wed 28-11-12 02:29:08, Anton Vorontsov wrote:
> This is an attempt to implement David Rientjes' idea of mempressure
> cgroup.
>
> The main characteristics are the same to what I've tried to add to vmevent
> API:
>
> Internally, it uses Mel Gorman's idea of scanned/reclaimed ratio for
> pre
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