diff --git a/arch/arm/arm/src/los_arch_mmu.c b/arch/arm/arm/src/los_arch_mmu.c
index 7d7cf935c162f659acc4593966b383da29d05bee..ec6111f7d6ca46d30bd2addf3a74bd8c9f09fdff 100644
--- a/arch/arm/arm/src/los_arch_mmu.c
+++ b/arch/arm/arm/src/los_arch_mmu.c
@@ -624,8 +624,7 @@ STATUS_T LOS_ArchMmuChangeProt(LosArchMmu *archMmu, VADDR_T vaddr, size_t count,
 
         status = LOS_ArchMmuUnmap(archMmu, vaddr, 1);
         if (status < 0) {
-            VM_ERR("invalid args:aspace %p, vaddr %p, count %d",
-                   __FUNCTION__, __LINE__, archMmu, vaddr, count);
+            VM_ERR("invalid args:aspace %p, vaddr %p, count %d", archMmu, vaddr, count);
             return LOS_NOK;
         }
 
@@ -832,7 +831,7 @@ STATIC VOID OsSetKSectionAttr(VOID)
                              kmallocLength >> MMU_DESCRIPTOR_L2_SMALL_SHIFT,
                              VM_MAP_REGION_FLAG_PERM_READ | VM_MAP_REGION_FLAG_PERM_WRITE);
     if (status != (kmallocLength >> MMU_DESCRIPTOR_L2_SMALL_SHIFT)) {
-        VM_ERR("unmap failed, status: %d", status);
+        VM_ERR("mmap failed, status: %d", status);
         return;
     }
     LOS_VmSpaceReserve(kSpace, kmallocLength, bssEndBoundary);
diff --git a/kernel/base/vm/los_vm_map.c b/kernel/base/vm/los_vm_map.c
index 56abd2618f95ee3755e6bde049a4a90789361449..34709c0de2b97b9a5b18e94637fd149622cdc13a 100644
--- a/kernel/base/vm/los_vm_map.c
+++ b/kernel/base/vm/los_vm_map.c
@@ -561,7 +561,7 @@ STATIC VOID OsDevPagesRemove(LosArchMmu *archMmu, VADDR_T vaddr, UINT32 count)
     status_t status;
 
     if ((archMmu == NULL) || (vaddr == 0) || (count == 0)) {
-        VM_ERR("OsAnonPagesRemove invalid args, archMmu %p, vaddr %p, count %d", archMmu, vaddr, count);
+        VM_ERR("OsDevPagesRemove invalid args, archMmu %p, vaddr %p, count %d", archMmu, vaddr, count);
         return;
     }
 
@@ -658,10 +658,9 @@ STATIC LosVmMapRegion *OsVmRegionSplit(LosVmMapRegion *oldRegion, VADDR_T newReg
     LosVmSpace *space = oldRegion->space;
     size_t size = LOS_RegionSize(newRegionStart, LOS_RegionEndAddr(oldRegion));
 
-    LOS_RbDelNode(&space->regionRbTree, &oldRegion->rbNode);
     oldRegion->range.size = LOS_RegionSize(oldRegion->range.base, newRegionStart - 1);
-    if (oldRegion->range.size != 0) {
-        LOS_RbAddNode(&space->regionRbTree, &oldRegion->rbNode);
+    if (oldRegion->range.size == 0) {
+        LOS_RbDelNode(&space->regionRbTree, &oldRegion->rbNode);
     }
 
     newRegion = OsVmRegionDup(oldRegion->space, oldRegion, newRegionStart, size);
@@ -682,15 +681,7 @@ STATUS_T OsVmRegionAdjust(LosVmSpace *space, VADDR_T newRegionStart, size_t size
     LosVmMapRegion *newRegion = NULL;
 
     region = LOS_RegionFind(space, newRegionStart);
-    if ((region == NULL) || (region->range.base >= nextRegionBase)) {
-        return LOS_ERRNO_VM_NOT_FOUND;
-    }
-
-    if ((region->range.base == newRegionStart) && (region->range.size == size)) {
-        return LOS_OK;
-    }
-
-    if (newRegionStart > region->range.base) {
+    if ((region != NULL) && (newRegionStart > region->range.base)) {
         newRegion = OsVmRegionSplit(region, newRegionStart);
         if (newRegion == NULL) {
             VM_ERR("region split fail");
@@ -796,7 +787,7 @@ STATUS_T OsIsRegionCanExpand(LosVmSpace *space, LosVmMapRegion *region, size_t s
 
     nextRegion = (LosVmMapRegion *)LOS_RbSuccessorNode(&space->regionRbTree, &region->rbNode);
     /* if the gap is larger than size, then we can expand */
-    if ((nextRegion != NULL) && ((nextRegion->range.base - region->range.base - region->range.size) > size)) {
+    if ((nextRegion != NULL) && ((nextRegion->range.base - region->range.base ) >= size)) {
         return LOS_OK;
     }