Re: [RFC v3 0/3] vmpressure_fd: Linux VM pressure notifications

[Kirill A. Shutemov]

On Wed, Nov 07, 2012 at 01:28:12PM +0200, Pekka Enberg wrote:
> On Wed, Nov 7, 2012 at 1:21 PM, Kirill A. Shutemov <kirill@xxxxxxxxxxxxx> wrote:
> >> While the new API is very simple, it is still extensible (i.e. versioned).
> >
> > Sorry, I didn't follow previous discussion on this, but could you
> > explain what's wrong with memory notifications from memcg?
> > As I can see you can get pretty similar functionality using memory
> > thresholds on the root cgroup. What's the point?
> 
> Why should you be required to use cgroups to get VM pressure events to
> userspace?

Valid point. But in fact you have it on most systems anyway.

I personally don't like to have a syscall per small feature.
Isn't it better to have a file-based interface which can be used with
normal file syscalls: open()/read()/poll()?

-- 
 Kirill A. Shutemov
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