Commit 88a479ff authored Jul 27, 2020 by Roger Pau Monne Committed by Juergen Gross Aug 03, 2020

xen/balloon: make the balloon wait interruptible



So it can be killed, or else processes can get hung indefinitely
waiting for balloon pages.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200727091342.52325-3-roger.pau@citrix.com


Signed-off-by: Juergen Gross <jgross@suse.com>

parent 1951fa33

drivers/xen/balloon.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -568,11 +568,13 @@ static int add_ballooned_pages(int nr_pages)
		if (xen_hotplug_unpopulated) {
		st = reserve_additional_memory();
		if (st != BP_ECANCELED) {
		int rc;

		mutex_unlock(&balloon_mutex);
		wait_event(balloon_wq,
		rc = wait_event_interruptible(balloon_wq,
		!list_empty(&ballooned_pages));
		mutex_lock(&balloon_mutex);
		return 0;
		return rc ? -ENOMEM : 0;
		}
		}

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