diff mbox series

[RFCv1,4/5] xen/balloon: try to merge "System RAM" resources

Message ID 20200731091838.7490-5-david@redhat.com (mailing list archive)
State New, archived
Headers show
Series mm/memory_hotplug: selective merging of memory resources | expand

Commit Message

David Hildenbrand July 31, 2020, 9:18 a.m. UTC 
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: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Roger Pau Monné <roger.pau@citrix.com>
Cc: Julien Grall <julien@xen.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
 drivers/xen/balloon.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 77c57568e5d7f..644ae2e3798e2 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -353,6 +353,10 @@  static enum bp_state reserve_additional_memory(void)
 	if (rc) {
 		pr_warn("Cannot add additional memory (%i)\n", rc);
 		goto err;
+	} else {
+		resource = NULL;
+		/* Try to reduce the number of "System RAM" resources. */
+		merge_child_mem_resources(&iomem_resource, "System RAM");
 	}
 
 	balloon_stats.total_pages += balloon_hotplug;