From: "Huang\, Ying" <ying.huang@intel.com>
To: David Rientjes <rientjes@google.com>
Cc: Dave Hansen <dave.hansen@intel.com>,
Yang Shi <yang.shi@linux.alibaba.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
<linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>,
<kbusch@kernel.org>, <dan.j.williams@intel.com>
Subject: Re: [RFC][PATCH 3/8] mm/vmscan: Attempt to migrate page in lieu of discard
Date: Thu, 02 Jul 2020 09:50:51 +0800 [thread overview]
Message-ID: <87v9j6k7lw.fsf@yhuang-dev.intel.com> (raw)
In-Reply-To: <alpine.DEB.2.23.453.2007011248580.1908531@chino.kir.corp.google.com> (David Rientjes's message of "Wed, 1 Jul 2020 12:50:23 -0700")
David Rientjes <rientjes@google.com> writes:
> On Wed, 1 Jul 2020, Dave Hansen wrote:
>
>> Even if they don't allocate directly from PMEM, is it OK for such an app
>> to get its cold data migrated to PMEM? That's a much more subtle
>> question and I suspect the kernel isn't going to have a single answer
>> for it. I suspect we'll need a cpuset-level knob to turn auto-demotion
>> on or off.
>>
>
> I think the answer is whether the app's cold data can be reclaimed,
> otherwise migration to PMEM is likely better in terms of performance. So
> any such app today should just be mlocking its cold data if it can't
> handle overhead from reclaim?
Yes. That's a way to solve the problem. A cpuset-level knob may be
more flexible, because you don't need to change the application source
code.
Best Regards,
Huang, Ying
next prev parent reply other threads:[~2020-07-02 1:51 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-29 23:45 [RFC][PATCH 0/8] Migrate Pages in lieu of discard Dave Hansen
2020-06-29 23:45 ` Dave Hansen
2020-06-29 23:45 ` [RFC][PATCH 1/8] mm/numa: node demotion data structure and lookup Dave Hansen
2020-06-29 23:45 ` Dave Hansen
2020-06-29 23:45 ` [RFC][PATCH 2/8] mm/migrate: Defer allocating new page until needed Dave Hansen
2020-06-29 23:45 ` Dave Hansen
2020-07-01 8:47 ` Greg Thelen
2020-07-01 8:47 ` Greg Thelen
2020-07-01 14:46 ` Dave Hansen
2020-07-01 18:32 ` Yang Shi
2020-06-29 23:45 ` [RFC][PATCH 3/8] mm/vmscan: Attempt to migrate page in lieu of discard Dave Hansen
2020-06-29 23:45 ` Dave Hansen
2020-07-01 0:47 ` David Rientjes
2020-07-01 0:47 ` David Rientjes
2020-07-01 1:29 ` Yang Shi
2020-07-01 5:41 ` David Rientjes
2020-07-01 5:41 ` David Rientjes
2020-07-01 8:54 ` Huang, Ying
2020-07-01 8:54 ` Huang, Ying
2020-07-01 18:20 ` Dave Hansen
2020-07-01 19:50 ` David Rientjes
2020-07-01 19:50 ` David Rientjes
2020-07-02 1:50 ` Huang, Ying [this message]
2020-07-02 1:50 ` Huang, Ying
2020-07-01 15:15 ` Dave Hansen
2020-07-01 17:21 ` Yang Shi
2020-07-01 19:45 ` David Rientjes
2020-07-01 19:45 ` David Rientjes
2020-07-02 10:02 ` Jonathan Cameron
2020-07-01 1:40 ` Huang, Ying
2020-07-01 1:40 ` Huang, Ying
2020-07-01 16:48 ` Dave Hansen
2020-07-01 19:25 ` David Rientjes
2020-07-01 19:25 ` David Rientjes
2020-07-02 5:02 ` Huang, Ying
2020-07-02 5:02 ` Huang, Ying
2020-06-29 23:45 ` [RFC][PATCH 4/8] mm/vmscan: add page demotion counter Dave Hansen
2020-06-29 23:45 ` Dave Hansen
2020-06-29 23:45 ` [RFC][PATCH 5/8] mm/numa: automatically generate node migration order Dave Hansen
2020-06-29 23:45 ` Dave Hansen
2020-06-30 8:22 ` Huang, Ying
2020-06-30 8:22 ` Huang, Ying
2020-07-01 18:23 ` Dave Hansen
2020-07-02 1:20 ` Huang, Ying
2020-07-02 1:20 ` Huang, Ying
2020-06-29 23:45 ` [RFC][PATCH 6/8] mm/vmscan: Consider anonymous pages without swap Dave Hansen
2020-06-29 23:45 ` Dave Hansen
2020-06-29 23:45 ` [RFC][PATCH 7/8] mm/vmscan: never demote for memcg reclaim Dave Hansen
2020-06-29 23:45 ` Dave Hansen
2020-06-29 23:45 ` [RFC][PATCH 8/8] mm/numa: new reclaim mode to enable reclaim-based migration Dave Hansen
2020-06-29 23:45 ` Dave Hansen
2020-06-30 7:23 ` Huang, Ying
2020-06-30 7:23 ` Huang, Ying
2020-06-30 17:50 ` Yang Shi
2020-07-01 0:48 ` Huang, Ying
2020-07-01 0:48 ` Huang, Ying
2020-07-01 1:12 ` Yang Shi
2020-07-01 1:28 ` Huang, Ying
2020-07-01 1:28 ` Huang, Ying
2020-07-01 16:02 ` Dave Hansen
2020-07-03 9:30 ` Huang, Ying
2020-07-03 9:30 ` Huang, Ying
2020-06-30 18:36 ` [RFC][PATCH 0/8] Migrate Pages in lieu of discard Shakeel Butt
2020-06-30 18:36 ` Shakeel Butt
2020-06-30 18:51 ` Dave Hansen
2020-06-30 19:25 ` Shakeel Butt
2020-06-30 19:25 ` Shakeel Butt
2020-06-30 19:31 ` Dave Hansen
2020-07-01 14:24 ` [RFC] [PATCH " Zi Yan
2020-07-01 14:32 ` Dave Hansen
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