Commit c673ec61 authored Dec 12, 2019 by Juergen Gross

xen/balloon: fix ballooned page accounting without hotplug enabled



When CONFIG_XEN_BALLOON_MEMORY_HOTPLUG is not defined
reserve_additional_memory() will set balloon_stats.target_pages to a
wrong value in case there are still some ballooned pages allocated via
alloc_xenballooned_pages().

This will result in balloon_process() no longer be triggered when
ballooned pages are freed in batches.

Reported-by: Nicholas Tsirakis <niko.tsirakis@gmail.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>

parent fa2ac657

drivers/xen/balloon.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -395,7 +395,8 @@ static struct notifier_block xen_memory_nb = {
		#else
		static enum bp_state reserve_additional_memory(void)
		{
		balloon_stats.target_pages = balloon_stats.current_pages;
		balloon_stats.target_pages = balloon_stats.current_pages +
		balloon_stats.target_unpopulated;
		return BP_ECANCELED;
		}
		#endif /* CONFIG_XEN_BALLOON_MEMORY_HOTPLUG */

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