9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 #ifndef OS_CPU_LINUX_X86_ZBACKINGFILE_LINUX_X86_HPP
  25 #define OS_CPU_LINUX_X86_ZBACKINGFILE_LINUX_X86_HPP
  26 
  27 #include "memory/allocation.hpp"
  28 
  29 class ZBackingFile VALUE_OBJ_CLASS_SPEC {
  30 private:
  31   int      _fd;
  32   uint64_t _filesystem;
  33   bool     _initialized;
  34 
  35   int create_mem_fd(const char* name) const;
  36   int create_file_fd(const char* name) const;
  37   int create_fd(const char* name) const;
  38 
  39   bool is_tmpfs() const;
  40   bool is_hugetlbfs() const;
  41   bool tmpfs_supports_transparent_huge_pages() const;
  42 
  43   bool try_split_and_expand_tmpfs(size_t offset, size_t length, size_t alignment) const;
  44   bool try_expand_tmpfs(size_t offset, size_t length, size_t alignment) const;
  45   bool expand_tmpfs(size_t offset, size_t length) const;
  46 
  47   bool expand_hugetlbfs(size_t offset, size_t length) const;
  48 
  49 public:

   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 #ifndef OS_CPU_LINUX_X86_ZBACKINGFILE_LINUX_X86_HPP
  25 #define OS_CPU_LINUX_X86_ZBACKINGFILE_LINUX_X86_HPP
  26 
  27 #include "memory/allocation.hpp"
  28 
  29 class ZBackingFile {
  30 private:
  31   int      _fd;
  32   uint64_t _filesystem;
  33   bool     _initialized;
  34 
  35   int create_mem_fd(const char* name) const;
  36   int create_file_fd(const char* name) const;
  37   int create_fd(const char* name) const;
  38 
  39   bool is_tmpfs() const;
  40   bool is_hugetlbfs() const;
  41   bool tmpfs_supports_transparent_huge_pages() const;
  42 
  43   bool try_split_and_expand_tmpfs(size_t offset, size_t length, size_t alignment) const;
  44   bool try_expand_tmpfs(size_t offset, size_t length, size_t alignment) const;
  45   bool expand_tmpfs(size_t offset, size_t length) const;
  46 
  47   bool expand_hugetlbfs(size_t offset, size_t length) const;
  48 
  49 public: