fix: vmstat cache column should include SReclaimable (closes #389)

src/uu/vmstat/src/parser.rs

@@ -204,6 +204,7 @@ pub struct Meminfo {
     pub mem_available: bytesize::ByteSize,
     pub buffers: bytesize::ByteSize,
     pub cached: bytesize::ByteSize,
+    pub s_reclaimable: bytesize::ByteSize,
     pub swap_cached: bytesize::ByteSize,
     pub active: bytesize::ByteSize,
     pub inactive: bytesize::ByteSize,
@@ -226,6 +227,8 @@ impl Meminfo {
             bytesize::ByteSize::from_str(proc_map.get("MemAvailable").unwrap()).unwrap();
         let buffers = bytesize::ByteSize::from_str(proc_map.get("Buffers").unwrap()).unwrap();
         let cached = bytesize::ByteSize::from_str(proc_map.get("Cached").unwrap()).unwrap();
+        let s_reclaimable =
+            bytesize::ByteSize::from_str(proc_map.get("SReclaimable").unwrap()).unwrap();
         let swap_cached =
             bytesize::ByteSize::from_str(proc_map.get("SwapCached").unwrap()).unwrap();
         let active = bytesize::ByteSize::from_str(proc_map.get("Active").unwrap()).unwrap();
@@ -238,6 +241,7 @@ impl Meminfo {
             mem_available,
             buffers,
             cached,
+            s_reclaimable,
             swap_cached,
             active,
             inactive,

src/uu/vmstat/src/picker.rs

@@ -354,7 +354,10 @@ fn get_memory_info(
     }
 
     let buffer = with_unit(memory_info.buffers.as_u64(), matches);
-    let cache = with_unit(memory_info.cached.as_u64(), matches);
+    let cache = with_unit(
+        (memory_info.cached + memory_info.s_reclaimable).as_u64(),
+        matches,
+    );
 
     vec![
         (len, format!("{swap_used}")),