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-rw-r--r--ipc/util.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/ipc/util.c b/ipc/util.c
index 71f3f3982fc8..d126d156efc6 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -220,9 +220,14 @@ static inline int ipc_idr_alloc(struct ipc_ids *ids, struct kern_ipc_perm *new)
*/
if (next_id < 0) { /* !CHECKPOINT_RESTORE or next_id is unset */
+ int max_idx;
+
+ max_idx = max(ids->in_use*3/2, ipc_min_cycle);
+ max_idx = min(max_idx, ipc_mni);
/* allocate the idx, with a NULL struct kern_ipc_perm */
- idx = idr_alloc(&ids->ipcs_idr, NULL, 0, 0, GFP_NOWAIT);
+ idx = idr_alloc_cyclic(&ids->ipcs_idr, NULL, 0, max_idx,
+ GFP_NOWAIT);
if (idx >= 0) {
/*