diff --git a/README.md b/README.md
index 0b375e0..83937f2 100644
--- a/README.md
+++ b/README.md
@@ -898,6 +898,17 @@ _**Example** (require at least 1 GB free)_:  `check_hw_swap_free 1048576`
 <br />
 
 
+##### check_hw_slab_unreclaimable
+`check_hw_slab_unreclaimable max_kb`
+
+`check_hw_slab_unreclaimable` compares the amount of slab unreclaimable memory to the maximum provided (in kB).  If the slab unreclaimable is greater than _max_kb_ kilobytes, the check fails.
+
+_**Example** (require less than 5 GB unreclaimable)_:  `check_hw_slab_unreclaimable 5242880`
+
+
+<br />
+
+
 ##### check_moab_sched
 `check_moab_sched [-t timeout] [-a alert_match] [-m [!]mstr] [-v version_match]`
 
diff --git a/scripts/lbnl_hw.nhc b/scripts/lbnl_hw.nhc
index ddc6f82..a99e24c 100644
--- a/scripts/lbnl_hw.nhc
+++ b/scripts/lbnl_hw.nhc
@@ -11,6 +11,7 @@ HW_RAM_TOTAL=0
 HW_RAM_FREE=0
 HW_SWAP_TOTAL=0
 HW_SWAP_FREE=0
+HW_SLAB_UNRECLAIMABLE=0
 HW_IB_STATE=( )
 HW_IB_PHYS_STATE=()
 HW_IB_RATE=( )
@@ -81,6 +82,8 @@ function nhc_hw_gather_data() {
                 HW_SWAP_TOTAL=${FIELD[1]}
             elif [[ "${FIELD[0]}" = "SwapFree:" ]]; then
                 HW_SWAP_FREE=${FIELD[1]}
+            elif [[ "${FIELD[0]}" = "SUnreclaim:" ]]; then
+                HW_SLAB_UNRECLAIMABLE=${FIELD[1]}
             fi
         done < /proc/meminfo
     else
@@ -328,6 +331,23 @@ function check_hw_mem_free() {
     return 0
 }
 
+# Check amount of Slab unreclaimable against maximum ($1).
+function check_hw_slab_unreclaimable() {
+    local MAXUNRECLAIMABLE=$1
+
+    if [[ $HW_RAM_TOTAL -eq 0 ]]; then
+        nhc_hw_gather_data
+    fi
+
+    nhc_common_parse_size "$MAXUNRECLAIMABLE" MAXUNRECLAIMABLE
+
+    if [[ $HW_SLAB_UNRECLAIMABLE -gt $MAXUNRECLAIMABLE ]]; then
+        die 1 "$FUNCNAME:  Slab unreclaimable is too large ($HW_SLAB_UNRECLAIMABLE kB > $MAXUNRECLAIMABLE kB)."
+        return 1
+    fi
+    return 0
+}
+
 # Check if IB state, phys_state, and rate ($1) all match.
 function check_hw_ib() {
     local STATE="ACTIVE"