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From: Michal Hocko <mhocko@kernel.org>
To: James Courtier-Dutton <james.dutton@gmail.com>
Cc: Daniel Drake <drake@endlessm.com>,
	"Artem S. Tashkinov" <aros@gmx.com>,
	LKML Mailing List <linux-kernel@vger.kernel.org>,
	linux@endlessm.com, hadess@hadess.net,
	Johannes Weiner <hannes@cmpxchg.org>
Subject: Re: Let's talk about the elephant in the room - the Linux kernel's inability to gracefully handle low memory pressure
Date: Thu, 29 Aug 2019 14:29:09 +0200	[thread overview]
Message-ID: <20190829122909.GG28313@dhcp22.suse.cz> (raw)
In-Reply-To: <CAAMvbhH=ftMoh9eFVR3YgN9DVSLaN5tXa-vTsBocY8YuL0Rc1A@mail.gmail.com>

On Wed 21-08-19 22:42:29, James Courtier-Dutton wrote:
> On Tue, 20 Aug 2019 at 07:47, Daniel Drake <drake@endlessm.com> wrote:
> >
> > Hi,
> >
> > And if there is a meaningful way to make the kernel behave better, that would
> > obviously be of huge value too.
> >
> > Thanks
> > Daniel
> 
> Hi,
> 
> Is there a way for an application to be told that there is a memory
> pressure situation?

PSI (CONFIG_PSI) measures global as well as per memcg pressure characteristics.

[...]

> I have also found, for the desktop, one of the biggest pressures on
> the system is disk pressure. Accessing the disk causes the UI to be
> less responsive.
> For example, if I am in vim, and trying to type letters on the
> keyboard, whether some other application is using the disk or not
> should have no impact on my letter writing. Has anyone got any ideas
> with regards to what we can do about that?

This is what we have the page cache for.
-- 
Michal Hocko
SUSE Labs

  reply	other threads:[~2019-08-29 12:29 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-04  9:23 Let's talk about the elephant in the room - the Linux kernel's inability to gracefully handle low memory pressure Artem S. Tashkinov
2019-08-05 12:13 ` Vlastimil Babka
2019-08-05 13:31   ` Michal Hocko
2019-08-05 16:47     ` Suren Baghdasaryan
2019-08-05 16:47       ` Suren Baghdasaryan
2019-08-05 18:55     ` Johannes Weiner
2019-08-06  9:29       ` Michal Hocko
2019-08-05 19:31   ` Johannes Weiner
2019-08-06  1:08     ` Suren Baghdasaryan
2019-08-06  1:08       ` Suren Baghdasaryan
2019-08-06  9:36       ` Vlastimil Babka
2019-08-06 14:27         ` Johannes Weiner
2019-08-06 14:36           ` Michal Hocko
2019-08-06 16:27             ` Suren Baghdasaryan
2019-08-06 16:27               ` Suren Baghdasaryan
2019-08-06 22:01               ` Johannes Weiner
2019-08-07  7:59                 ` Michal Hocko
2019-08-07 20:51                   ` Johannes Weiner
2019-08-07 21:01                     ` Andrew Morton
2019-08-07 21:34                       ` Johannes Weiner
2019-08-07 21:12                     ` Johannes Weiner
2019-08-08 11:48                     ` Michal Hocko
2019-08-08 15:10                       ` ndrw.xf
2019-08-08 15:10                         ` ndrw.xf
2019-08-08 16:32                         ` Michal Hocko
2019-08-08 17:57                           ` ndrw.xf
2019-08-08 17:57                             ` ndrw.xf
2019-08-08 18:59                             ` Michal Hocko
2019-08-08 21:59                               ` ndrw
2019-08-09  8:57                                 ` Michal Hocko
2019-08-09 10:09                                   ` ndrw
2019-08-09 10:50                                     ` Michal Hocko
2019-08-09 14:18                                       ` Pintu Agarwal
2019-08-09 14:18                                         ` Pintu Agarwal
2019-08-10 12:34                                       ` ndrw
2019-08-12  8:24                                         ` Michal Hocko
2019-08-10 21:07                                   ` ndrw
2021-07-24 17:32                         ` Alexey Avramov
2021-07-25  2:11                           ` Hillf Danton
2019-08-08 14:47                     ` Vlastimil Babka
2019-08-08 17:27                       ` Johannes Weiner
2019-08-09 14:56                         ` Vlastimil Babka
2019-08-09 17:31                           ` Johannes Weiner
2019-08-13 13:47                             ` Vlastimil Babka
2019-08-06 21:43       ` James Courtier-Dutton
2019-08-06 21:43         ` James Courtier-Dutton
2019-08-06 19:00 ` Florian Weimer
2019-08-20  6:46 ` Daniel Drake
2019-08-21 21:42   ` James Courtier-Dutton
2019-08-29 12:29     ` Michal Hocko [this message]
2019-09-02 20:15     ` Pavel Machek
2019-08-23  1:54   ` ndrw
2019-08-23  2:14     ` Daniel Drake
2019-08-05  9:05 Hillf Danton
2019-08-05 12:01 ` Artem S. Tashkinov
2019-08-06  8:57 Johannes Buchner
2019-08-06 19:43 Remi Gauvin

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