From 9cb2f04853640f386dd7db2d61d981a14cd67729 Mon Sep 17 00:00:00 2001 From: alc Date: Sat, 2 Jul 2011 23:42:04 +0000 Subject: When iterating over a paging queue, explicitly check for PG_MARKER, instead of relying on zeroed memory being interpreted as an empty PV list. Reviewed by: kib --- sys/i386/xen/pmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sys/i386/xen/pmap.c') diff --git a/sys/i386/xen/pmap.c b/sys/i386/xen/pmap.c index a23ae6d..87bc0a0 100644 --- a/sys/i386/xen/pmap.c +++ b/sys/i386/xen/pmap.c @@ -2012,7 +2012,7 @@ pmap_collect(pmap_t locked_pmap, struct vpgqueues *vpq) sched_pin(); TAILQ_FOREACH(m, &vpq->pl, pageq) { - if (m->hold_count || m->busy) + if ((m->flags & PG_MARKER) != 0 || m->hold_count || m->busy) continue; TAILQ_FOREACH_SAFE(pv, &m->md.pv_list, pv_list, next_pv) { va = pv->pv_va; -- cgit v1.1