" kernel: gran_size: 512M chunk_size: 1G num_reg: 8 lose cover RAM: 1528M " messages reported in Red Hat Enterprise Linux 6

Issue

• What are below messages and what do they mean ?

Jul 26 14:37:25  kernel: total RAM covered: 98296M
Jul 26 14:37:25  kernel: gran_size: 64K  chunk_size: 64K         num_reg: 8      lose cover RAM: 93G
Jul 26 14:37:25  kernel: gran_size: 64K  chunk_size: 128K        num_reg: 8      lose cover RAM: 93G
Jul 26 14:37:25  kernel: gran_size: 64K  chunk_size: 256K        num_reg: 8      lose cover RAM: 93G
Jul 26 14:37:25  kernel: gran_size: 64K  chunk_size: 512K        num_reg: 8      lose cover RAM: 93G
Jul 26 14:37:25  kernel: gran_size: 64K  chunk_size: 1M  num_reg: 8      lose cover RAM: 93G
Jul 26 14:37:25  kernel: gran_size: 64K  chunk_size: 2M  num_reg: 8      lose cover RAM: 93G
Jul 26 14:37:25  kernel: gran_size: 64K  chunk_size: 4M  num_reg: 8      lose cover RAM: 93G
Jul 26 14:37:25  kernel: gran_size: 64K  chunk_size: 8M  num_reg: 8      lose cover RAM: 93G
Jul 26 14:37:25  kernel: gran_size: 64K  chunk_size: 16M         num_reg: 8      lose cover RAM: 1G
Jul 26 14:37:25  kernel: gran_size: 64K  chunk_size: 32M         num_reg: 8      lose cover RAM: 1G
Jul 26 14:37:25  kernel: gran_size: 64K  chunk_size: 64M         num_reg: 8      lose cover RAM: 1G
Jul 26 14:37:25  kernel: gran_size: 64K  chunk_size: 128M        num_reg: 8      lose cover RAM: 1G
Jul 26 14:37:25  kernel: gran_size: 64K  chunk_size: 256M        num_reg: 8      lose cover RAM: 1G
Jul 26 14:37:25  kernel: gran_size: 64K  chunk_size: 512M        num_reg: 8      lose cover RAM: 1G
Jul 26 14:37:25  kernel: gran_size: 64K  chunk_size: 1G  num_reg: 8      lose cover RAM: 1G
Jul 26 14:37:25  kernel: gran_size: 64K  chunk_size: 2G  num_reg: 8      lose cover RAM: 1G
Jul 26 14:37:25  kernel: gran_size: 128K         chunk_size: 128K        num_reg: 8      lose cover RAM: 93G
Jul 26 14:37:25  kernel: gran_size: 128K         chunk_size: 256K        num_reg: 8      lose cover RAM: 93G
Jul 26 14:37:25  kernel: gran_size: 128K         chunk_size: 512K        num_reg: 8      lose cover RAM: 93G
Jul 26 14:37:25  kernel: gran_size: 512M         chunk_size: 512M        num_reg: 8      lose cover RAM: 504M
Jul 26 14:37:25  kernel: gran_size: 512M         chunk_size: 1G  num_reg: 8      lose cover RAM: 1528M
Jul 26 14:37:25  kernel: gran_size: 512M         chunk_size: 2G  num_reg: 8      lose cover RAM: 1528M
Jul 26 14:37:25  kernel: gran_size: 1G   chunk_size: 1G  num_reg: 7      lose cover RAM: 1016M
Jul 26 14:37:25  kernel: gran_size: 1G   chunk_size: 2G  num_reg: 8      lose cover RAM: 1016M
Jul 26 14:37:25  kernel: gran_size: 2G   chunk_size: 2G  num_reg: 6      lose cover RAM: 2040M

• What do these logs indicate ?

Jul 26 14:37:25  kernel: mtrr_cleanup: can not find optimal value
Jul 26 14:37:25  kernel: please specify mtrr_gran_size/mtrr_chunk_size
Jul 26 14:37:25  kernel: last_pfn = 0xbf770 max_arch_pfn = 0x400000000
Jul 26 14:37:25  kernel: init_memory_mapping: 0000000000000000-00000000bf770000
Jul 26 14:37:25  kernel: init_memory_mapping: 0000000100000000-0000001840000000
Jul 26 14:37:25  kernel: RAMDISK: 3703b000 - 37fef2f9