Messages in this thread Patch in this message | | | From | Yinghai Lu <> | Subject | [PATCH 2/2] x86: mtrr_cleanup try gran_size to less than 1M | Date | Mon, 29 Sep 2008 18:54:12 -0700 |
| |
one have gran < 1M
reg00: base=0xd8000000 (3456MB), size= 128MB: uncachable, count=1 reg01: base=0xe0000000 (3584MB), size= 512MB: uncachable, count=1 reg02: base=0x00000000 ( 0MB), size=4096MB: write-back, count=1 reg03: base=0x100000000 (4096MB), size= 512MB: write-back, count=1 reg04: base=0x120000000 (4608MB), size= 128MB: write-back, count=1 reg05: base=0xd7f80000 (3455MB), size= 512KB: uncachable, count=1
will get
Found optimal setting for mtrr clean up gran_size: 512K chunk_size: 2M num_reg: 7 lose RAM: 0G range0: 0000000000000000 - 00000000d8000000 Setting variable MTRR 0, base: 0GB, range: 2GB, type WB Setting variable MTRR 1, base: 2GB, range: 1GB, type WB Setting variable MTRR 2, base: 3GB, range: 256MB, type WB Setting variable MTRR 3, base: 3328MB, range: 128MB, type WB hole: 00000000d7f00000 - 00000000d7f80000 Setting variable MTRR 4, base: 3455MB, range: 512KB, type UC rangeX: 0000000100000000 - 0000000128000000 Setting variable MTRR 5, base: 4GB, range: 512MB, type WB Setting variable MTRR 6, base: 4608MB, range: 128MB, type WB
so start from 64k instead of 1M
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> --- arch/x86/kernel/cpu/mtrr/main.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
Index: linux-2.6/arch/x86/kernel/cpu/mtrr/main.c =================================================================== --- linux-2.6.orig/arch/x86/kernel/cpu/mtrr/main.c +++ linux-2.6/arch/x86/kernel/cpu/mtrr/main.c @@ -1197,11 +1197,11 @@ struct mtrr_cleanup_result { }; /* - * gran_size: 1M, 2M, ..., 2G + * gran_size: 64K, 128K, 256K, 512K, 1M, 2M, ..., 2G * chunk size: gran_size, ..., 2G - * so we need (1+12)*6 + * so we need (1+16)*8 */ -#define NUM_RESULT 78 +#define NUM_RESULT 136 #define PSHIFT (PAGE_SHIFT - 10) static struct mtrr_cleanup_result __initdata result[NUM_RESULT]; @@ -1322,7 +1322,7 @@ static int __init mtrr_cleanup(unsigned i = 0; memset(min_loss_pfn, 0xff, sizeof(min_loss_pfn)); memset(result, 0, sizeof(result)); - for (gran_size = (1ULL<<20); gran_size < (1ULL<<32); gran_size <<= 1) { + for (gran_size = (1ULL<<16); gran_size < (1ULL<<32); gran_size <<= 1) { char gran_factor; unsigned long gran_base;
| |