If we're doing a try-alloc of a pv entry and give up early, do not forget

to reduce the pv_entry_count counter.  This was found by Tor Egge.  In the
same email, Tor also pointed out the pv_stats problem in the previous
commit, but I'd forgotten about it until I went looking for this email
about this allocation problem.

1 files changed, 1 insertions, 0 deletions

diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
index 6ff0a28af26c..9d0f042769a0 100644
--- a/sys/amd64/amd64/pmap.c
+++ b/sys/amd64/amd64/pmap.c
@@ -1616,6 +1616,7 @@ get_pv_entry(pmap_t pmap, int try)
 	m = vm_page_alloc(NULL, colour, VM_ALLOC_SYSTEM | VM_ALLOC_NOOBJ);
 	if (m == NULL) {
 		if (try) {
+			pv_entry_count--;
 			PV_STAT(pc_chunk_tryfail++);
 			return (NULL);
 		}