From: "Kirill A. Shutemov" <kirill-oKw7cIdHH8eLwutG50LtGA@public.gmane.org>
To: Pekka Enberg <penberg-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Anton Vorontsov
<anton.vorontsov-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Mel Gorman <mgorman-l3A5Bk7waGM@public.gmane.org>,
Leonid Moiseichuk
<leonid.moiseichuk-xNZwKgViW5gAvxtiuMwx3w@public.gmane.org>,
KOSAKI Motohiro
<kosaki.motohiro-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Minchan Kim <minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Bartlomiej Zolnierkiewicz
<b.zolnierkie-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
John Stultz <john.stultz-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linaro-kernel-cunTk1MwBs8s++Sfvej+rw@public.gmane.org,
patches-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
kernel-team-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org,
linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [RFC v3 0/3] vmpressure_fd: Linux VM pressure notifications
Date: Wed, 7 Nov 2012 13:43:22 +0200 [thread overview]
Message-ID: <20121107114321.GA32265@shutemov.name> (raw)
In-Reply-To: <CAOJsxLHY+3ZzGuGX=4o1pLfhRqjkKaEMyhX0ejB5nVrDvOWXNA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
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-oKw7cIdHH8eLwutG50LtGA@public.gmane.org> 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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next prev parent reply other threads:[~2012-11-07 11:43 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-07 10:53 [RFC v3 0/3] vmpressure_fd: Linux VM pressure notifications Anton Vorontsov
2012-11-07 11:01 ` [RFC 1/3] mm: Add " Anton Vorontsov
2012-11-08 17:01 ` Mel Gorman
[not found] ` <20121108170124.GB8218-l3A5Bk7waGM@public.gmane.org>
2012-11-08 17:14 ` Kirill A. Shutemov
2012-11-13 18:38 ` Jonathan Corbet
2012-11-07 11:01 ` [RFC 2/3] tools/testing: Add vmpressure-test utility Anton Vorontsov
2012-11-07 11:01 ` [RFC 3/3] man-pages: Add man page for vmpressure_fd(2) Anton Vorontsov
2012-11-07 14:19 ` Rik van Riel
2012-11-20 5:52 ` Andrew Morton
[not found] ` <20121119215211.6370ac3b.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2012-11-20 6:24 ` Anton Vorontsov
2012-11-20 18:12 ` David Rientjes
[not found] ` <alpine.DEB.2.00.1211201004390.4200-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-11-21 15:01 ` Mel Gorman
2012-11-21 19:39 ` Andrew Morton
2012-11-22 8:52 ` Pekka Enberg
2012-11-07 11:21 ` [RFC v3 0/3] vmpressure_fd: Linux VM pressure notifications Kirill A. Shutemov
2012-11-07 11:43 ` Anton Vorontsov
2012-11-07 12:11 ` Kirill A. Shutemov
[not found] ` <20121107121110.GA32402-oKw7cIdHH8eLwutG50LtGA@public.gmane.org>
2012-11-07 12:28 ` Anton Vorontsov
[not found] ` <20121107112136.GA31715-oKw7cIdHH8eLwutG50LtGA@public.gmane.org>
2012-11-07 11:28 ` Pekka Enberg
[not found] ` <CAOJsxLHY+3ZzGuGX=4o1pLfhRqjkKaEMyhX0ejB5nVrDvOWXNA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-11-07 11:43 ` Kirill A. Shutemov [this message]
[not found] ` <20121107114321.GA32265-oKw7cIdHH8eLwutG50LtGA@public.gmane.org>
2012-11-15 3:21 ` David Rientjes
[not found] ` <alpine.DEB.2.00.1211141910050.14414-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-11-15 3:39 ` Anton Vorontsov
2012-11-15 3:59 ` David Rientjes
[not found] ` <alpine.DEB.2.00.1211141946370.14414-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-11-15 7:34 ` Anton Vorontsov
[not found] ` <20121115073420.GA19036-SAfYLu58TvsAzdhXFe8piDcLetGT9WKNKwcig+XE9tjR7s880joybQ@public.gmane.org>
2012-11-15 8:11 ` David Rientjes
2012-11-15 8:52 ` Anton Vorontsov
2012-11-15 21:25 ` David Rientjes
[not found] ` <alpine.DEB.2.00.1211151303510.27188-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-11-16 9:33 ` Glauber Costa
[not found] ` <50A60873.3000607-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
2012-11-16 20:04 ` David Rientjes
2012-11-16 21:12 ` Glauber Costa
2012-11-16 21:57 ` David Rientjes
2012-11-17 1:21 ` Anton Vorontsov
2012-11-18 22:53 ` David Rientjes
[not found] ` <20121117012114.GA22910-SAfYLu58TvubUOgZnPAKMoC2/QZ1MJnMKwcig+XE9tjR7s880joybQ@public.gmane.org>
2012-11-19 14:00 ` Glauber Costa
[not found] ` <alpine.DEB.2.00.1211161349420.17853-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-11-19 13:57 ` Glauber Costa
2012-11-20 18:02 ` David Rientjes
[not found] ` <alpine.DEB.2.00.1211200950120.4200-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-11-21 9:30 ` Kirill A. Shutemov
2012-11-21 11:32 ` leonid.moiseichuk
2012-11-21 11:54 ` Glauber Costa
2012-11-21 13:48 ` leonid.moiseichuk
2012-11-26 21:35 ` Michal Hocko
2012-11-19 14:19 ` Glauber Costa
[not found] ` <50AA3FEF.2070100-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
2012-11-20 18:23 ` David Rientjes
[not found] ` <alpine.DEB.2.00.1211201013460.4200-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-11-21 8:27 ` Glauber Costa
2012-11-21 8:46 ` Anton Vorontsov
2012-11-21 9:25 ` Glauber Costa
2012-11-07 17:20 ` Greg Thelen
[not found] ` <xr93liedfhy4.fsf-aSPv4SP+Du0KgorLzL7FmE7CuiCeIGUxQQ4Iyu8u01E@public.gmane.org>
2012-11-07 20:52 ` Pekka Enberg
2012-11-07 11:30 ` Pekka Enberg
[not found] ` <CAOJsxLFz+Zi=A0uyuNMj411ngjwpstakNY3fEWy6tW_h4whr7w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-11-07 11:31 ` Pekka Enberg
2012-11-07 12:06 ` Anton Vorontsov
2012-11-09 8:32 ` Luiz Capitulino
2012-11-09 9:04 ` Anton Vorontsov
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