On Fri, Aug 21, 2020 at 12:34:31PM +0200, David Hildenbrand wrote:
> Let's use the new mechanism to merge system ram resources below the
> root. We are the only one hotplugging system ram, e.g., DIMMs don't apply,
> so this is safe to be used.
>
> Cc: Andrew Morton <a...@linux-foundation.org>
> Cc: Michal Hocko <mho...@suse.com>
> Cc: "K. Y. Srinivasan" <k...@microsoft.com>
> Cc: Haiyang Zhang <haiya...@microsoft.com>
> Cc: Stephen Hemminger <sthem...@microsoft.com>
> Cc: Wei Liu <wei....@kernel.org>
> Cc: Pankaj Gupta <pankaj.gupta.li...@gmail.com>
> Cc: Baoquan He <b...@redhat.com>
> Cc: Wei Yang <richardw.y...@linux.intel.com>
> Signed-off-by: David Hildenbrand <da...@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..49a6305f0fb73 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_system_ram_resources(&iomem_resource);
> }
You don't need to put the call under the "else" branch. It will have
broken out of the loop if ret is not zero.
Wei.
>
> /*
> --
> 2.26.2
>
