Re: [PATCH v4 7/8] xen/balloon: try to merge system ram resources

[Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx>]

On Fri, Sep 11, 2020 at 12:34:58PM +0200, David Hildenbrand wrote:
>Let's try to merge system ram resources we add, to minimize the number
>of resources in /proc/iomem. We don't care about the boundaries of
>individual chunks we added.
>
>Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
>Cc: Andrew Morton <akpmt@xxxxxxxxxxxxxxxxxxxx>
>Cc: Michal Hocko <mhocko@xxxxxxxx>
>Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
>Cc: Juergen Gross <jgross@xxxxxxxx>
>Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
>Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>
>Cc: Julien Grall <julien@xxxxxxx>
>Cc: Pankaj Gupta <pankaj.gupta.linux@xxxxxxxxx>
>Cc: Baoquan He <bhe@xxxxxxxxxx>
>Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>

Reviewed-by: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx>

>---
> drivers/xen/balloon.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
>index 9f40a294d398d..b57b2067ecbfb 100644
>--- a/drivers/xen/balloon.c
>+++ b/drivers/xen/balloon.c
>@@ -331,7 +331,7 @@ static enum bp_state reserve_additional_memory(void)
>       mutex_unlock(&balloon_mutex);
>       /* add_memory_resource() requires the device_hotplug lock */
>       lock_device_hotplug();
>-      rc = add_memory_resource(nid, resource, MHP_NONE);
>+      rc = add_memory_resource(nid, resource, MEMHP_MERGE_RESOURCE);
>       unlock_device_hotplug();
>       mutex_lock(&balloon_mutex);
> 
>-- 
>2.26.2

-- 
Wei Yang
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