[PATCH RFCv1 4/5] xen/balloon: try to merge "System RAM" resources
From: David Hildenbrand <hidden>
Date: 2020-07-31 09:19:10
Also in:
linux-mm, lkml, virtualization, xen-devel
Subsystem:
the rest, xen hypervisor interface · Maintainers:
Linus Torvalds, Juergen Gross, Stefano Stabellini
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 <redacted> Signed-off-by: David Hildenbrand <redacted> --- drivers/xen/balloon.c | 4 ++++ 1 file changed, 4 insertions(+)
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;
--
2.26.2