All of lore.kernel.org
 help / color / mirror / Atom feed
From: David Hildenbrand <david@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org, linux-mm@kvack.org,
	linux-hyperv@vger.kernel.org, xen-devel@lists.xenproject.org,
	David Hildenbrand <david@redhat.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Michal Hocko <mhocko@suse.com>,
	"K. Y. Srinivasan" <kys@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	Wei Liu <wei.liu@kernel.org>
Subject: [PATCH RFCv1 5/5] hv_balloon:: try to merge "System RAM" resources
Date: Fri, 31 Jul 2020 11:18:38 +0200	[thread overview]
Message-ID: <20200731091838.7490-6-david@redhat.com> (raw)
In-Reply-To: <20200731091838.7490-1-david@redhat.com>

Let's reuse the new mechanism to merge "System RAM" resources below the
root. We are the only one hotplugging "System RAM" and DIMMs don't apply,
so this is safe to use.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Wei Liu <wei.liu@kernel.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
 drivers/hv/hv_balloon.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
index 32e3bc0aa665a..0745f7cc1727b 100644
--- a/drivers/hv/hv_balloon.c
+++ b/drivers/hv/hv_balloon.c
@@ -745,6 +745,9 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size,
 			has->covered_end_pfn -=  processed_pfn;
 			spin_unlock_irqrestore(&dm_device.ha_lock, flags);
 			break;
+		} else {
+			/* Try to reduce the number of "System RAM" resources. */
+			merge_child_mem_resources(&iomem_resource, "System RAM");
 		}
 
 		/*
-- 
2.26.2


WARNING: multiple messages have this Message-ID (diff)
From: David Hildenbrand <david@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-hyperv@vger.kernel.org, Michal Hocko <mhocko@suse.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	Wei Liu <wei.liu@kernel.org>,
	virtualization@lists.linux-foundation.org, linux-mm@kvack.org,
	xen-devel@lists.xenproject.org,
	Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH RFCv1 5/5] hv_balloon:: try to merge "System RAM" resources
Date: Fri, 31 Jul 2020 11:18:38 +0200	[thread overview]
Message-ID: <20200731091838.7490-6-david@redhat.com> (raw)
In-Reply-To: <20200731091838.7490-1-david@redhat.com>

Let's reuse the new mechanism to merge "System RAM" resources below the
root. We are the only one hotplugging "System RAM" and DIMMs don't apply,
so this is safe to use.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Wei Liu <wei.liu@kernel.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
 drivers/hv/hv_balloon.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
index 32e3bc0aa665a..0745f7cc1727b 100644
--- a/drivers/hv/hv_balloon.c
+++ b/drivers/hv/hv_balloon.c
@@ -745,6 +745,9 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size,
 			has->covered_end_pfn -=  processed_pfn;
 			spin_unlock_irqrestore(&dm_device.ha_lock, flags);
 			break;
+		} else {
+			/* Try to reduce the number of "System RAM" resources. */
+			merge_child_mem_resources(&iomem_resource, "System RAM");
 		}
 
 		/*
-- 
2.26.2

_______________________________________________
Virtualization mailing list
Virtualization@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/virtualization

WARNING: multiple messages have this Message-ID (diff)
From: David Hildenbrand <david@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-hyperv@vger.kernel.org, Michal Hocko <mhocko@suse.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	David Hildenbrand <david@redhat.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	Wei Liu <wei.liu@kernel.org>,
	virtualization@lists.linux-foundation.org, linux-mm@kvack.org,
	xen-devel@lists.xenproject.org,
	Andrew Morton <akpm@linux-foundation.org>,
	"K. Y. Srinivasan" <kys@microsoft.com>
Subject: [PATCH RFCv1 5/5] hv_balloon:: try to merge "System RAM" resources
Date: Fri, 31 Jul 2020 11:18:38 +0200	[thread overview]
Message-ID: <20200731091838.7490-6-david@redhat.com> (raw)
In-Reply-To: <20200731091838.7490-1-david@redhat.com>

Let's reuse the new mechanism to merge "System RAM" resources below the
root. We are the only one hotplugging "System RAM" and DIMMs don't apply,
so this is safe to use.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Wei Liu <wei.liu@kernel.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
 drivers/hv/hv_balloon.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
index 32e3bc0aa665a..0745f7cc1727b 100644
--- a/drivers/hv/hv_balloon.c
+++ b/drivers/hv/hv_balloon.c
@@ -745,6 +745,9 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size,
 			has->covered_end_pfn -=  processed_pfn;
 			spin_unlock_irqrestore(&dm_device.ha_lock, flags);
 			break;
+		} else {
+			/* Try to reduce the number of "System RAM" resources. */
+			merge_child_mem_resources(&iomem_resource, "System RAM");
 		}
 
 		/*
-- 
2.26.2



  parent reply	other threads:[~2020-07-31  9:19 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-31  9:18 [PATCH RFCv1 0/5] mm/memory_hotplug: selective merging of memory resources David Hildenbrand
2020-07-31  9:18 ` David Hildenbrand
2020-07-31  9:18 ` David Hildenbrand
2020-07-31  9:18 ` [PATCH RFCv1 1/5] kernel/resource: make release_mem_region_adjustable() never fail David Hildenbrand
2020-07-31  9:18   ` David Hildenbrand
2020-07-31  9:18   ` David Hildenbrand
2020-07-31  9:18 ` [PATCH RFCv1 2/5] kernel/resource: merge_child_mem_resources() to merge memory resources after adding succeeded David Hildenbrand
2020-07-31  9:18   ` David Hildenbrand
2020-07-31  9:18   ` David Hildenbrand
2020-07-31  9:18 ` [PATCH RFCv1 3/5] virtio-mem: try to merge "System RAM (virtio_mem)" resources David Hildenbrand
2020-07-31  9:18   ` David Hildenbrand
2020-07-31  9:18   ` David Hildenbrand
2020-07-31 10:40   ` David Hildenbrand
2020-07-31 10:40     ` David Hildenbrand
2020-07-31 10:40     ` David Hildenbrand
2020-07-31  9:18 ` [PATCH RFCv1 4/5] xen/balloon: try to merge "System RAM" resources David Hildenbrand
2020-07-31  9:18   ` David Hildenbrand
2020-07-31  9:18   ` David Hildenbrand
2020-07-31  9:18 ` David Hildenbrand [this message]
2020-07-31  9:18   ` [PATCH RFCv1 5/5] hv_balloon:: " David Hildenbrand
2020-07-31  9:18   ` David Hildenbrand

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200731091838.7490-6-david@redhat.com \
    --to=david@redhat.com \
    --cc=akpm@linux-foundation.org \
    --cc=haiyangz@microsoft.com \
    --cc=kys@microsoft.com \
    --cc=linux-hyperv@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=mhocko@suse.com \
    --cc=sthemmin@microsoft.com \
    --cc=virtualization@lists.linux-foundation.org \
    --cc=wei.liu@kernel.org \
    --cc=xen-devel@lists.xenproject.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.