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Subject[PATCH] x86: mtrr_cleanup print out var mtrr before change it
Date
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>

---
arch/x86/kernel/cpu/mtrr/main.c | 25 ++++++++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)

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
@@ -1211,13 +1211,14 @@ static unsigned long __initdata min_loss
static int __init mtrr_cleanup(unsigned address_bits)
{
unsigned long extra_remove_base, extra_remove_size;
- unsigned long i, base, size, def, dummy;
+ unsigned long base, size, def, dummy;
mtrr_type type;
int nr_range, nr_range_new;
u64 chunk_size, gran_size;
unsigned long range_sums, range_sums_new;
int index_good;
int num_reg_good;
+ int i;

/* extra one for all 0 */
int num[MTRR_NUM_TYPES + 1];
@@ -1259,6 +1260,28 @@ static int __init mtrr_cleanup(unsigned
num_var_ranges - num[MTRR_NUM_TYPES])
return 0;

+ /* print orignal var mtrr at first */
+ printk(KERN_DEBUG "original variable MTRRs\n");
+ for (i = 0; i < num_var_ranges; i++) {
+ char start_factor = 'K', size_factor = 'K';
+ unsigned long start_base, size_base;
+
+ size_base = range_state[i].size_pfn<<(PAGE_SHIFT - 10);
+ if (!size_base)
+ continue;
+
+ size_base = to_size_factor(size_base, &size_factor),
+ start_base = range_state[i].base_pfn<<(PAGE_SHIFT - 10);
+ start_base = to_size_factor(start_base, &start_factor),
+
+ printk(KERN_DEBUG "reg %d, base: %ld%cB, range: %ld%cB, type %s\n",
+ i, start_base, start_factor,
+ size_base, size_factor,
+ (type == MTRR_TYPE_UNCACHABLE)?"UC":
+ ((type == MTRR_TYPE_WRBACK)?"WB":"Other")
+ );
+ }
+
memset(range, 0, sizeof(range));
extra_remove_size = 0;
extra_remove_base = 1 << (32 - PAGE_SHIFT);

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