Messages in this thread | | | Date | Wed, 7 Nov 2012 13:43:22 +0200 | From | "Kirill A. Shutemov" <> | Subject | Re: [RFC v3 0/3] vmpressure_fd: Linux VM pressure notifications |
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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@shutemov.name> 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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