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