From: keith.busch@intel.com (Keith Busch)
Subject: [LSF/MM TOPIC] memory reclaim with NUMA rebalancing
Date: Wed, 30 Jan 2019 11:12:22 -0700 [thread overview]
Message-ID: <20190130181221.GA19525@localhost.localdomain> (raw)
In-Reply-To: <20190130174847.GD18811@dhcp22.suse.cz>
On Wed, Jan 30, 2019@06:48:47PM +0100, Michal Hocko wrote:
> Hi,
> I would like to propose the following topic for the MM track. Different
> group of people would like to use NVIDMMs as a low cost & slower memory
> which is presented to the system as a NUMA node. We do have a NUMA API
> but it doesn't really fit to "balance the memory between nodes" needs.
> People would like to have hot pages in the regular RAM while cold pages
> might be at lower speed NUMA nodes. We do have NUMA balancing for
> promotion path but there is notIhing for the other direction. Can we
> start considering memory reclaim to move pages to more distant and idle
> NUMA nodes rather than reclaim them? There are certainly details that
> will get quite complicated but I guess it is time to start discussing
> this at least.
Yes, thanks for the proposal. I would be very interested in this
discussion for MM. I think some of the details for determining such a
migration path are related to the heterogeneous memory attributes I'm
currently trying to export.
WARNING: multiple messages have this Message-ID (diff)
From: Keith Busch <keith.busch@intel.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: lsf-pc@lists.linux-foundation.org, linux-mm@kvack.org,
LKML <linux-kernel@vger.kernel.org>,
linux-nvme@lists.infradead.org
Subject: Re: [LSF/MM TOPIC] memory reclaim with NUMA rebalancing
Date: Wed, 30 Jan 2019 11:12:22 -0700 [thread overview]
Message-ID: <20190130181221.GA19525@localhost.localdomain> (raw)
In-Reply-To: <20190130174847.GD18811@dhcp22.suse.cz>
On Wed, Jan 30, 2019 at 06:48:47PM +0100, Michal Hocko wrote:
> Hi,
> I would like to propose the following topic for the MM track. Different
> group of people would like to use NVIDMMs as a low cost & slower memory
> which is presented to the system as a NUMA node. We do have a NUMA API
> but it doesn't really fit to "balance the memory between nodes" needs.
> People would like to have hot pages in the regular RAM while cold pages
> might be at lower speed NUMA nodes. We do have NUMA balancing for
> promotion path but there is notIhing for the other direction. Can we
> start considering memory reclaim to move pages to more distant and idle
> NUMA nodes rather than reclaim them? There are certainly details that
> will get quite complicated but I guess it is time to start discussing
> this at least.
Yes, thanks for the proposal. I would be very interested in this
discussion for MM. I think some of the details for determining such a
migration path are related to the heterogeneous memory attributes I'm
currently trying to export.
next prev parent reply other threads:[~2019-01-30 18:12 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-30 17:48 [LSF/MM TOPIC] memory reclaim with NUMA rebalancing Michal Hocko
2019-01-30 17:48 ` Michal Hocko
2019-01-30 18:12 ` Keith Busch [this message]
2019-01-30 18:12 ` Keith Busch
2019-01-30 23:53 ` Yang Shi
2019-01-30 23:53 ` Yang Shi
2019-01-31 6:49 ` [LSF/MM ATTEND ] " Aneesh Kumar K.V
2019-02-06 19:03 ` Christopher Lameter
2019-02-06 19:03 ` Christopher Lameter
2019-02-22 13:48 ` Jonathan Cameron
2019-02-22 13:48 ` Jonathan Cameron
2019-02-22 14:12 ` Larry Woodman
2019-02-22 14:12 ` Larry Woodman
2019-02-23 13:27 ` Fengguang Wu
2019-02-23 13:27 ` Fengguang Wu
2019-02-23 13:42 ` Fengguang Wu
2019-02-23 13:42 ` Fengguang Wu
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