--- a/src/hotspot/share/runtime/arguments.cpp	Wed Jan 17 13:21:38 2018 +0800
+++ b/src/hotspot/share/runtime/arguments.cpp	Mon Jan 22 14:04:07 2018 -0500
@@ -509,7 +509,6 @@
   { "SafepointSpinBeforeYield",     JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
   { "DeferThrSuspendLoopCount",     JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
   { "DeferPollingPageLoopCount",    JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
-  { "UseCGroupMemoryLimitForHeap",  JDK_Version::jdk(10),  JDK_Version::undefined(), JDK_Version::jdk(11) },
   { "IgnoreUnverifiableClassesDuringDump", JDK_Version::jdk(10),  JDK_Version::undefined(), JDK_Version::undefined() },
   { "CheckEndorsedAndExtDirs",      JDK_Version::jdk(10),  JDK_Version::undefined(), JDK_Version::undefined() },
 
@@ -1856,32 +1855,6 @@
     FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
                             : (julong)MaxRAM;
 
-  // Experimental support for CGroup memory limits
-  if (UseCGroupMemoryLimitForHeap) {
-    // This is a rough indicator that a CGroup limit may be in force
-    // for this process
-    const char* lim_file = "/sys/fs/cgroup/memory/memory.limit_in_bytes";
-    FILE *fp = fopen(lim_file, "r");
-    if (fp != NULL) {
-      julong cgroup_max = 0;
-      int ret = fscanf(fp, JULONG_FORMAT, &cgroup_max);
-      if (ret == 1 && cgroup_max > 0) {
-        // If unlimited, cgroup_max will be a very large, but unspecified
-        // value, so use initial phys_mem as a limit
-        log_info(gc, heap)("Setting phys_mem to the min of cgroup limit ("
-                           JULONG_FORMAT "MB) and initial phys_mem ("
-                           JULONG_FORMAT "MB)", cgroup_max/M, phys_mem/M);
-        phys_mem = MIN2(cgroup_max, phys_mem);
-      } else {
-        warning("Unable to read/parse cgroup memory limit from %s: %s",
-                lim_file, errno != 0 ? strerror(errno) : "unknown error");
-      }
-      fclose(fp);
-    } else {
-      warning("Unable to open cgroup memory limit file %s (%s)", lim_file, strerror(errno));
-    }
-  }
-
   // Convert deprecated flags
   if (FLAG_IS_DEFAULT(MaxRAMPercentage) &&
       !FLAG_IS_DEFAULT(MaxRAMFraction))

--- a/src/hotspot/share/runtime/globals.hpp	Wed Jan 17 13:21:38 2018 +0800
+++ b/src/hotspot/share/runtime/globals.hpp	Mon Jan 22 14:04:07 2018 -0500
@@ -2042,11 +2042,6 @@
           "MaxRAM * MaxRAMPercentage / 100")                                \
           range(0, max_uintx)                                               \
                                                                             \
-  experimental(bool, UseCGroupMemoryLimitForHeap, false,                    \
-          "Use CGroup memory limit as physical memory limit for heap "      \
-          "sizing"                                                          \
-          "Deprecated, replaced by container support")                      \
-                                                                            \
   product(uintx, MaxRAMFraction, 4,                                         \
           "Maximum fraction (1/n) of real memory used for maximum heap "    \
           "size. "                                                          \