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From: Rashmica Gupta <rashmica.g@gmail.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	toshi.kani@hpe.com, tglx@linutronix.de, bp@suse.de,
	brijesh.singh@amd.com, thomas.lendacky@amd.com,
	jglisse@redhat.com, gregkh@linuxfoundation.org,
	baiyaowei@cmss.chinamobile.com, dan.j.williams@intel.com,
	iamjoonsoo.kim@lge.com, Vlastimil Babka <vbabka@suse.cz>,
	malat@debian.org, Bjorn Helgaas <bhelgaas@google.com>,
	Oscar Salvador <osalvador@techadventures.net>,
	yasu.isimatu@gmail.com, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org, Mike Rapoport <rppt@linux.vnet.ibm.com>
Subject: Re: [PATCH v3] resource: Merge resources on a node when hot-adding memory
Date: Sat, 11 Aug 2018 00:25:39 +1000
Message-ID: <CAC6rBsmkTSSg1RhWkpU-t+tQdyz7NKbfu96tX9BG1=LOGVg-Bw@mail.gmail.com> (raw)
In-Reply-To: <20180810130052.GC1644@dhcp22.suse.cz>

On Fri, Aug 10, 2018 at 11:00 PM, Michal Hocko <mhocko@kernel.org> wrote:
> On Fri 10-08-18 16:55:40, Rashmica Gupta wrote:
> [...]
>> Most memory hotplug/hotremove seems to be block or section based, and
>> always adds and removes memory at the same place.
>
> Yes and that is hard wired to the memory hotplug code. It is not easy to
> make it work outside of section units restriction. So whatever your
> memtrace is doing and if it relies on subsection hotplug it cannot
> possibly work with the current code.
>
> I didn't get to review your patch but if it is only needed for an
> unmerged code I would rather incline to not merge it unless it is a
> clear win to the resource subsystem. A report from Oscar shows that this
> is not the case though.
>

Yup, makes sense. I'll work on it and see if I can not break things.

> --
> Michal Hocko
> SUSE Labs

  reply index

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-09  2:54 Rashmica Gupta
2018-08-09 14:30 ` Vlastimil Babka
2018-08-09 15:03 ` Mike Rapoport
2018-08-10  1:12 ` Andrew Morton
2018-08-10  6:55   ` Rashmica Gupta
2018-08-10  8:28     ` Vlastimil Babka
2018-08-10 13:00     ` Michal Hocko
2018-08-10 14:25       ` Rashmica Gupta [this message]
2018-08-10 19:32         ` Oscar Salvador
2018-08-10 12:26 ` Oscar Salvador

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