Xend-based toolstacks don't have static-max entry in xenstore. The equivalent node for those toolstacks is memory_static_max.
Fixes: 5266b8e4445c (xen: fix booting ballooned down hvm guest) Signed-off-by: Boris Ostrovsky boris.ostrovsky@oracle.com Cc: stable@vger.kernel.org # 4.13 --- drivers/xen/xen-balloon.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/xen/xen-balloon.c b/drivers/xen/xen-balloon.c index 63c1494a8d73..2acbfe104e46 100644 --- a/drivers/xen/xen-balloon.c +++ b/drivers/xen/xen-balloon.c @@ -76,12 +76,15 @@ static void watch_target(struct xenbus_watch *watch,
if (!watch_fired) { watch_fired = true; - err = xenbus_scanf(XBT_NIL, "memory", "static-max", "%llu", - &static_max); - if (err != 1) - static_max = new_target; - else + + if ((xenbus_scanf(XBT_NIL, "memory", "static-max", + "%llu", &static_max) == 1) || + (xenbus_scanf(XBT_NIL, "memory", "memory_static_max", + "%llu", &static_max) == 1)) static_max >>= PAGE_SHIFT - 10; + else + static_max = new_target; + target_diff = (xen_pv_domain() || xen_initial_domain()) ? 0 : static_max - balloon_stats.target_pages; }