Linux-HyperV Archive on lore.kernel.org
 help / color / 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
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 index

Thread overview: 7+ 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 ` [PATCH RFCv1 1/5] kernel/resource: make release_mem_region_adjustable() never fail 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 ` [PATCH RFCv1 3/5] virtio-mem: try to merge "System RAM (virtio_mem)" resources 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 [this message]

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

Linux-HyperV Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-hyperv/0 linux-hyperv/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-hyperv linux-hyperv/ https://lore.kernel.org/linux-hyperv \
		linux-hyperv@vger.kernel.org
	public-inbox-index linux-hyperv

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-hyperv


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git