x86: add mtrr_cleanup_debug command line

add mtrr_cleanup_debug to print out more info about layout

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c
index 93d575ac61a3366c524b9f10cb142450e0fa7719..aff46b99ff0127a8593199b5d2c2bee926b09c25 100644 (file)
--- a/arch/x86/kernel/cpu/mtrr/main.c
+++ b/arch/x86/kernel/cpu/mtrr/main.c
@@ -836,6 +836,13 @@ static int __init enable_mtrr_cleanup_setup(char *str)
 }
 early_param("enble_mtrr_cleanup", enable_mtrr_cleanup_setup);
 
+static int __init mtrr_cleanup_debug_setup(char *str)
+{
+       debug_print = 1;
+       return 0;
+}
+early_param("mtrr_cleanup_debug", mtrr_cleanup_debug_setup);
+
 struct var_mtrr_state {
        unsigned long   range_startk;
        unsigned long   range_sizek;
@@ -1227,7 +1234,7 @@ static int __init mtrr_cleanup(unsigned address_bits)
        if (mtrr_chunk_size && mtrr_gran_size) {
                int num_reg;
 
-               debug_print = 1;
+               debug_print++;
                /* convert ranges to var ranges state */
                num_reg = x86_setup_var_mtrrs(range, nr_range, mtrr_chunk_size,
                                              mtrr_gran_size);
@@ -1263,7 +1270,7 @@ static int __init mtrr_cleanup(unsigned address_bits)
                }
                printk(KERN_INFO "invalid mtrr_gran_size or mtrr_chunk_size, "
                       "will find optimal one\n");
-               debug_print = 0;
+               debug_print--;
                memset(result, 0, sizeof(result[0]));
        }
 
@@ -1366,8 +1373,9 @@ static int __init mtrr_cleanup(unsigned address_bits)
                chunk_size <<= 10;
                gran_size = result[i].gran_sizek;
                gran_size <<= 10;
-               debug_print = 1;
+               debug_print++;
                x86_setup_var_mtrrs(range, nr_range, chunk_size, gran_size);
+               debug_print--;
                set_var_mtrr_all(address_bits);
                return 1;
        }