From: Roger Pau Monne Date: Wed, 8 Aug 2018 11:46:41 +0000 (+0200) Subject: xen/balloon: fix balloon initialization for PVH Dom0 X-Git-Tag: v4.19~423^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3596924a233e45aa918c961a902170fc4916461b;p=platform%2Fkernel%2Flinux-rpi3.git xen/balloon: fix balloon initialization for PVH Dom0 The current balloon code tries to calculate a delta factor for the balloon target when running in HVM mode in order to account for memory used by the firmware. This workaround for memory accounting doesn't work properly on a PVH Dom0, that has a static-max value different from the target value even at startup. Note that this is not a problem for DomUs because guests are started with a static-max value that matches the amount of RAM in the memory map. Fix this by forcefully setting target_diff for Dom0, regardless of it's mode. Reported-by: Gabriel Bercarug Signed-off-by: Roger Pau Monné Reviewed-by: Juergen Gross Signed-off-by: Boris Ostrovsky --- diff --git a/drivers/xen/xen-balloon.c b/drivers/xen/xen-balloon.c index b437fcc..294f35c 100644 --- a/drivers/xen/xen-balloon.c +++ b/drivers/xen/xen-balloon.c @@ -81,7 +81,7 @@ static void watch_target(struct xenbus_watch *watch, static_max = new_target; else static_max >>= PAGE_SHIFT - 10; - target_diff = xen_pv_domain() ? 0 + target_diff = (xen_pv_domain() || xen_initial_domain()) ? 0 : static_max - balloon_stats.target_pages; }