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x86: improve MTRR trimming messages 

improve the MTTR trimming messages and also trigger a WARN_ON()
so that kerneloops.org can pick it up and categorize it.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
hifive-unleashed-5.1
Ingo Molnar 2008-01-30 13:33:35 +01:00
parent 9a1b62fe85
commit cd7d72bb27
1 changed files with 7 additions and 10 deletions
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17
arch/x86/kernel/cpu/mtrr/main.c
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@ -706,20 +706,17 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn)
/* kvm/qemu doesn't have mtrr set right, don't trim them all */
if (!highest_addr) {
printk(KERN_WARNING "***************\n");
printk(KERN_WARNING "**** WARNING: likely strange cpu\n");
printk(KERN_WARNING "**** MTRRs all blank, cpu in qemu?\n");
printk(KERN_WARNING "***************\n");
printk(KERN_WARNING "WARNING: strange, CPU MTRRs all blank?\n");
WARN_ON(1);
return 0;
}
if ((highest_addr >> PAGE_SHIFT) < end_pfn) {
printk(KERN_WARNING "***************\n");
printk(KERN_WARNING "**** WARNING: likely BIOS bug\n");
printk(KERN_WARNING "**** MTRRs don't cover all of "
"memory, trimmed %ld pages\n", end_pfn -
(highest_addr >> PAGE_SHIFT));
printk(KERN_WARNING "***************\n");
printk(KERN_WARNING "WARNING: BIOS bug: CPU MTRRs don't cover"
" all of memory, losing %LdMB of RAM.\n",
(((u64)end_pfn << PAGE_SHIFT) - highest_addr) >> 20);
WARN_ON(1);
printk(KERN_INFO "update e820 for mtrr\n");
trim_start = highest_addr;