From: Wei Xu <weixugc@google.com>
To: Jagdish Gediya <jvgediya@linux.ibm.com>,
Greg Thelen <gthelen@google.com>
Cc: Linux MM <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
aneesh.kumar@linux.ibm.com,
Baolin Wang <baolin.wang@linux.alibaba.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Huang Ying <ying.huang@intel.com>
Subject: Re: [PATCH v2 2/5] mm: demotion: Add new node state N_DEMOTION_TARGETS
Date: Wed, 20 Apr 2022 21:33:43 -0700 [thread overview]
Message-ID: <CAAPL-u_xWwjJBoRE8Ce_oRFmmFHQ0DWTNn03zvPxX8HgtTrcWA@mail.gmail.com> (raw)
In-Reply-To: <20220413092206.73974-3-jvgediya@linux.ibm.com>
On Wed, Apr 13, 2022 at 2:22 AM Jagdish Gediya <jvgediya@linux.ibm.com> wrote:
>
> Current implementation to find the demotion targets works
> based on node state N_MEMORY, however some systems may have
> dram only memory numa node which are N_MEMORY but not the
> right choices as demotion targets.
>
> Add new state N_DEMOTION_TARGETS, node_states[N_DEMOTION_TARGETS]
> then can be used to hold the list of nodes which can be used
> as demotion targets.
>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
> Signed-off-by: Jagdish Gediya <jvgediya@linux.ibm.com>
> ---
> drivers/base/node.c | 4 ++++
> include/linux/nodemask.h | 1 +
> 2 files changed, 5 insertions(+)
>
> diff --git a/drivers/base/node.c b/drivers/base/node.c
> index ec8bb24a5a22..cd79815b0f7a 100644
> --- a/drivers/base/node.c
> +++ b/drivers/base/node.c
> @@ -1038,6 +1038,9 @@ static struct node_attr node_state_attr[] = {
> [N_CPU] = _NODE_ATTR(has_cpu, N_CPU),
> [N_GENERIC_INITIATOR] = _NODE_ATTR(has_generic_initiator,
> N_GENERIC_INITIATOR),
> + [N_DEMOTION_TARGETS] = _NODE_ATTR(has_demotion_targets,
> + N_DEMOTION_TARGETS),
These nodes are demotion targets themselves. It is not the case that
they have demotion targets. Let's rename "has_demotion_targets" to
"demotion_targets"?
> +
> };
>
> static struct attribute *node_state_attrs[] = {
> @@ -1050,6 +1053,7 @@ static struct attribute *node_state_attrs[] = {
> &node_state_attr[N_MEMORY].attr.attr,
> &node_state_attr[N_CPU].attr.attr,
> &node_state_attr[N_GENERIC_INITIATOR].attr.attr,
> + &node_state_attr[N_DEMOTION_TARGETS].attr.attr,
> NULL
> };
>
> diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h
> index 567c3ddba2c4..17844300fd57 100644
> --- a/include/linux/nodemask.h
> +++ b/include/linux/nodemask.h
> @@ -400,6 +400,7 @@ enum node_states {
> N_MEMORY, /* The node has memory(regular, high, movable) */
> N_CPU, /* The node has one or more cpus */
> N_GENERIC_INITIATOR, /* The node has one or more Generic Initiators */
> + N_DEMOTION_TARGETS, /* Nodes that should be considered as demotion targets */
> NR_NODE_STATES
> };
>
> --
> 2.35.1
>
>
next prev parent reply other threads:[~2022-04-21 4:34 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-13 9:22 [PATCH v2 0/5] mm: demotion: Introduce new node state N_DEMOTION_TARGETS Jagdish Gediya
2022-04-13 9:22 ` [PATCH v2 1/5] mm: demotion: Set demotion list differently Jagdish Gediya
2022-04-14 7:09 ` ying.huang
2022-04-14 8:48 ` Jagdish Gediya
2022-04-14 8:57 ` ying.huang
2022-04-14 8:55 ` Baolin Wang
2022-04-14 9:02 ` Jonathan Cameron
2022-04-14 10:40 ` Jagdish Gediya
2022-04-21 6:13 ` ying.huang
2022-04-13 9:22 ` [PATCH v2 2/5] mm: demotion: Add new node state N_DEMOTION_TARGETS Jagdish Gediya
2022-04-21 4:33 ` Wei Xu [this message]
2022-04-13 9:22 ` [PATCH v2 3/5] mm: demotion: Add support to set targets from userspace Jagdish Gediya
2022-04-21 4:26 ` Wei Xu
2022-04-22 9:13 ` Jagdish Gediya
2022-04-21 5:31 ` Wei Xu
2022-04-13 9:22 ` [PATCH v2 4/5] device-dax/kmem: Set node state as N_DEMOTION_TARGETS Jagdish Gediya
2022-04-13 9:22 ` [PATCH v2 5/5] mm: demotion: Build demotion list based on N_DEMOTION_TARGETS Jagdish Gediya
2022-04-13 21:44 ` [PATCH v2 0/5] mm: demotion: Introduce new node state N_DEMOTION_TARGETS Andrew Morton
2022-04-14 10:16 ` Jagdish Gediya
2022-04-14 7:00 ` ying.huang
2022-04-14 10:19 ` Jagdish Gediya
2022-04-21 3:11 ` Yang Shi
2022-04-21 5:41 ` Wei Xu
2022-04-21 6:24 ` ying.huang
2022-04-21 6:49 ` Wei Xu
2022-04-21 7:08 ` ying.huang
2022-04-21 7:29 ` Wei Xu
2022-04-21 7:45 ` ying.huang
2022-04-21 18:26 ` Wei Xu
2022-04-22 0:58 ` ying.huang
2022-04-22 4:46 ` Wei Xu
2022-04-22 5:40 ` ying.huang
2022-04-22 6:13 ` Wei Xu
2022-04-22 6:21 ` ying.huang
2022-04-22 11:00 ` Jagdish Gediya
2022-04-22 16:43 ` Wei Xu
2022-04-22 17:29 ` Yang Shi
2022-04-24 3:02 ` ying.huang
2022-04-25 3:50 ` Aneesh Kumar K.V
2022-04-25 6:10 ` ying.huang
2022-04-25 8:09 ` Aneesh Kumar K V
2022-04-25 8:54 ` Aneesh Kumar K V
2022-04-25 20:17 ` Davidlohr Bueso
2022-04-26 8:42 ` ying.huang
2022-04-26 9:02 ` Aneesh Kumar K V
2022-04-26 9:44 ` ying.huang
2022-04-27 4:27 ` Wei Xu
2022-04-25 7:26 ` Jagdish Gediya
2022-04-25 16:56 ` Wei Xu
2022-04-27 5:06 ` Aneesh Kumar K V
2022-04-27 18:27 ` Wei Xu
2022-04-28 0:56 ` ying.huang
2022-04-28 4:11 ` Wei Xu
2022-04-28 17:14 ` Yang Shi
2022-04-29 1:27 ` Alistair Popple
2022-04-29 2:21 ` ying.huang
2022-04-29 2:58 ` Wei Xu
2022-04-29 3:27 ` ying.huang
2022-04-29 4:45 ` Alistair Popple
2022-04-29 18:53 ` Yang Shi
2022-04-29 18:52 ` Yang Shi
2022-04-27 7:11 ` ying.huang
2022-04-27 16:27 ` Wei Xu
2022-04-28 8:37 ` ying.huang
[not found] ` <DM6PR11MB4107867291AFE0C210D9052ADCFD9@DM6PR11MB4107.namprd11.prod.outlook.com>
2022-04-30 2:21 ` Wei Xu
2022-04-21 17:56 ` Yang Shi
2022-04-21 23:48 ` ying.huang
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