From: Michal Hocko <mhocko@suse.com>
To: "Huang, Ying" <ying.huang@intel.com>
Cc: Feng Tang <feng.tang@intel.com>,
Aneesh Kumar K V <aneesh.kumar@linux.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>, Tejun Heo <tj@kernel.org>,
Zefan Li <lizefan.x@bytedance.com>,
Waiman Long <longman@redhat.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"cgroups@vger.kernel.org" <cgroups@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Hansen, Dave" <dave.hansen@intel.com>,
"Chen, Tim C" <tim.c.chen@intel.com>,
"Yin, Fengwei" <fengwei.yin@intel.com>
Subject: Re: [PATCH] mm/vmscan: respect cpuset policy during page demotion
Date: Mon, 31 Oct 2022 09:40:15 +0100 [thread overview]
Message-ID: <Y1+J7+1V1nJXF+3b@dhcp22.suse.cz> (raw)
In-Reply-To: <87bkpwkg24.fsf@yhuang6-desk2.ccr.corp.intel.com>
On Fri 28-10-22 07:22:27, Huang, Ying wrote:
> Michal Hocko <mhocko@suse.com> writes:
>
> > On Thu 27-10-22 17:31:35, Huang, Ying wrote:
[...]
> >> I think that it's possible for different processes have different
> >> requirements.
> >>
> >> - Some processes don't care about where the memory is placed, prefer
> >> local, then fall back to remote if no free space.
> >>
> >> - Some processes want to avoid cross-socket traffic, bind to nodes of
> >> local socket.
> >>
> >> - Some processes want to avoid to use slow memory, bind to fast memory
> >> node only.
> >
> > Yes, I do understand that. Do you have any specific examples in mind?
> > [...]
>
> Sorry, I don't have specific examples.
OK, then let's stop any complicated solution right here then. Let's
start simple with a per-mm flag to disable demotion of an address space.
Should there ever be a real demand for a more fine grained solution
let's go further but I do not think we want a half baked solution
without real usecases.
--
Michal Hocko
SUSE Labs
WARNING: multiple messages have this Message-ID (diff)
From: Michal Hocko <mhocko-IBi9RG/b67k@public.gmane.org>
To: "Huang, Ying" <ying.huang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: Feng Tang <feng.tang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Aneesh Kumar K V
<aneesh.kumar-tEXmvtCZX7AybS5Ee8rs3A@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>,
Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Zefan Li <lizefan.x-EC8Uxl6Npydl57MIdRCFDg@public.gmane.org>,
Waiman Long <longman-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
"linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org"
<linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org>,
"cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"Hansen,
Dave" <dave.hansen-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
"Chen,
Tim C" <tim.c.chen-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
"Yin,
Fengwei" <fengwei.yin-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH] mm/vmscan: respect cpuset policy during page demotion
Date: Mon, 31 Oct 2022 09:40:15 +0100 [thread overview]
Message-ID: <Y1+J7+1V1nJXF+3b@dhcp22.suse.cz> (raw)
In-Reply-To: <87bkpwkg24.fsf-fFUE1NP8JkzwuUmzmnQr+vooFf0ArEBIu+b9c/7xato@public.gmane.org>
On Fri 28-10-22 07:22:27, Huang, Ying wrote:
> Michal Hocko <mhocko-IBi9RG/b67k@public.gmane.org> writes:
>
> > On Thu 27-10-22 17:31:35, Huang, Ying wrote:
[...]
> >> I think that it's possible for different processes have different
> >> requirements.
> >>
> >> - Some processes don't care about where the memory is placed, prefer
> >> local, then fall back to remote if no free space.
> >>
> >> - Some processes want to avoid cross-socket traffic, bind to nodes of
> >> local socket.
> >>
> >> - Some processes want to avoid to use slow memory, bind to fast memory
> >> node only.
> >
> > Yes, I do understand that. Do you have any specific examples in mind?
> > [...]
>
> Sorry, I don't have specific examples.
OK, then let's stop any complicated solution right here then. Let's
start simple with a per-mm flag to disable demotion of an address space.
Should there ever be a real demand for a more fine grained solution
let's go further but I do not think we want a half baked solution
without real usecases.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2022-10-31 8:40 UTC|newest]
Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-26 7:43 [PATCH] mm/vmscan: respect cpuset policy during page demotion Feng Tang
2022-10-26 7:43 ` Feng Tang
2022-10-26 7:49 ` Aneesh Kumar K V
2022-10-26 7:49 ` Aneesh Kumar K V
2022-10-26 8:00 ` Feng Tang
2022-10-26 8:00 ` Feng Tang
2022-10-26 9:19 ` Michal Hocko
2022-10-26 9:19 ` Michal Hocko
2022-10-26 10:42 ` Aneesh Kumar K V
2022-10-26 10:42 ` Aneesh Kumar K V
2022-10-26 11:02 ` Michal Hocko
2022-10-26 11:02 ` Michal Hocko
2022-10-26 12:08 ` Aneesh Kumar K V
2022-10-26 12:08 ` Aneesh Kumar K V
2022-10-26 12:21 ` Michal Hocko
2022-10-26 12:21 ` Michal Hocko
2022-10-26 12:35 ` Aneesh Kumar K V
2022-10-26 12:35 ` Aneesh Kumar K V
2022-10-27 9:02 ` Michal Hocko
2022-10-27 9:02 ` Michal Hocko
2022-10-27 10:16 ` Aneesh Kumar K V
2022-10-27 10:16 ` Aneesh Kumar K V
2022-10-27 13:05 ` Michal Hocko
2022-10-27 13:05 ` Michal Hocko
2022-10-26 12:20 ` Feng Tang
2022-10-26 12:20 ` Feng Tang
2022-10-26 15:59 ` Michal Hocko
2022-10-26 15:59 ` Michal Hocko
2022-10-26 17:57 ` Yang Shi
2022-10-26 17:57 ` Yang Shi
2022-10-27 7:11 ` Feng Tang
2022-10-27 7:11 ` Feng Tang
2022-10-27 7:45 ` Huang, Ying
2022-10-27 7:45 ` Huang, Ying
2022-10-27 7:51 ` Feng Tang
2022-10-27 7:51 ` Feng Tang
2022-10-27 17:55 ` Yang Shi
2022-10-27 17:55 ` Yang Shi
2022-10-28 3:37 ` Feng Tang
2022-10-28 3:37 ` Feng Tang
2022-10-28 5:54 ` Huang, Ying
2022-10-28 5:54 ` Huang, Ying
2022-10-28 17:23 ` Yang Shi
2022-10-28 17:23 ` Yang Shi
2022-10-31 1:56 ` Huang, Ying
2022-10-31 1:56 ` Huang, Ying
2022-10-31 2:19 ` Feng Tang
2022-10-31 2:19 ` Feng Tang
2022-10-28 5:09 ` Aneesh Kumar K V
2022-10-28 5:09 ` Aneesh Kumar K V
2022-10-28 17:16 ` Yang Shi
2022-10-28 17:16 ` Yang Shi
2022-10-31 1:53 ` Huang, Ying
2022-10-31 1:53 ` Huang, Ying
2022-10-27 6:47 ` Huang, Ying
2022-10-27 6:47 ` Huang, Ying
2022-10-27 7:10 ` Michal Hocko
2022-10-27 7:10 ` Michal Hocko
2022-10-27 7:39 ` Huang, Ying
2022-10-27 7:39 ` Huang, Ying
2022-10-27 8:01 ` Michal Hocko
2022-10-27 8:01 ` Michal Hocko
2022-10-27 9:31 ` Huang, Ying
2022-10-27 9:31 ` Huang, Ying
2022-10-27 12:29 ` Michal Hocko
2022-10-27 12:29 ` Michal Hocko
2022-10-27 23:22 ` Huang, Ying
2022-10-27 23:22 ` Huang, Ying
2022-10-31 8:40 ` Michal Hocko [this message]
2022-10-31 8:40 ` Michal Hocko
2022-10-31 8:51 ` Huang, Ying
2022-10-31 8:51 ` Huang, Ying
2022-10-31 9:18 ` Michal Hocko
2022-10-31 9:18 ` Michal Hocko
2022-10-31 14:09 ` Feng Tang
2022-10-31 14:09 ` Feng Tang
2022-10-31 14:32 ` Michal Hocko
2022-10-31 14:32 ` Michal Hocko
2022-11-07 8:05 ` Feng Tang
2022-11-07 8:05 ` Feng Tang
2022-11-07 8:17 ` Michal Hocko
2022-11-07 8:17 ` Michal Hocko
2022-11-01 3:17 ` Huang, Ying
2022-11-01 3:17 ` Huang, Ying
2022-10-26 8:26 ` Yin, Fengwei
2022-10-26 8:26 ` Yin, Fengwei
2022-10-26 8:37 ` Feng Tang
2022-10-26 8:37 ` Feng Tang
2022-10-26 14:36 ` Waiman Long
2022-10-26 14:36 ` Waiman Long
2022-10-27 5:57 ` Feng Tang
2022-10-27 5:57 ` Feng Tang
2022-10-27 5:13 ` Huang, Ying
2022-10-27 5:13 ` Huang, Ying
2022-10-27 5:49 ` Feng Tang
2022-10-27 5:49 ` Feng Tang
2022-10-27 6:05 ` Huang, Ying
2022-10-27 6:05 ` Huang, Ying
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