Fall back to guessing available memory on Linux machines running kernels older than 3.14-rc1 (2014-02-02).

RELNOTES: N/A
PiperOrigin-RevId: 172356826

1 files changed, 14 insertions, 0 deletions

diff --git a/src/test/java/com/google/devtools/build/lib/unix/ProcMeminfoParserTest.java b/src/test/java/com/google/devtools/build/lib/unix/ProcMeminfoParserTest.java
index 244a32b401..e7596736de 100644
--- a/src/test/java/com/google/devtools/build/lib/unix/ProcMeminfoParserTest.java
+++ b/src/test/java/com/google/devtools/build/lib/unix/ProcMeminfoParserTest.java
@@ -81,4 +81,18 @@ public class ProcMeminfoParserTest {
     assertThrows(ProcMeminfoParser.KeywordNotFoundException.class,
         () -> memInfo.getRamKb("Bogus2"));
   }
+
+  @Test
+  public void testOldKernelFallback() throws Exception {
+    String meminfoContent =
+        StringUtilities.joinLines(
+            "MemTotal:      3091732 kB",
+            "Active:         636892 kB",
+            "Inactive:       212760 kB",
+            "Slab:            42820 kB");
+
+    String meminfoFile = scratch.file("test_meminfo", meminfoContent).getPathString();
+    ProcMeminfoParser memInfo = new ProcMeminfoParser(meminfoFile);
+    assertThat(memInfo.getFreeRamKb()).isEqualTo(2356756);
+  }
 }