Improve user-space page allocator.

    * Allow page allocation system call to force coalesce if a
      contiguous block is unavailable.  [long-term enhancement]

    * Workaround lack of large contiguous memory for PageTable
      test-cases, which require 256K, by allocating a VMM block.
      This should be removed when story 43401 is implemented.
      [short-term workaround]

Change-Id: Idddb30eaa3aeac52d56b82a70355095f31d4a0cd
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/1369
Tested-by: Jenkins Server
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Reviewed-by: Douglas R. Gilbert <dgilbert@us.ibm.com>
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/include/kernel/cpumgr.H b/src/include/kernel/cpumgr.H
index ca16d16d6..e4d2b8b0b 100644
--- a/src/include/kernel/cpumgr.H
+++ b/src/include/kernel/cpumgr.H
@@ -88,6 +88,13 @@ class CpuManager
         static size_t getCpuCount() { return cv_cpuCount; }
 
 
+        /** @fn forceMemoryPeriodic()
+         * Force the memory free / coalesce operations to be performed on the
+         * next "periodic" interval.
+         */
+        static void forceMemoryPeriodic();
+
+
     protected:
         CpuManager();
         ~CpuManager() {}
@@ -106,6 +113,7 @@ class CpuManager
         static Barrier cv_barrier;   //!<  barrier for cpus
         static bool cv_defrag;       //!<  mem heap defrag
         static size_t cv_cpuCount;   //!<  # of active CPUs
+        static bool cv_forcedMemPeriodic;       //!<  force free / coalesce.
 
         // If a shutdown of all CPUs is requested
         static bool cv_shutdown_requested;