Pavel Machek wrote:
> On Tue 2009-11-10 18:27:23, Yinghai Lu wrote:
>> try to find_e820_area/reserve_early, and call acpi_reserve_memory early
>>
>> to get area is below 1M
>
>> - acpi_realmode = (unsigned long)alloc_bootmem_low(WAKEUP_SIZE);
>> + mem = find_e820_area(0, 1<<20, WAKEUP_SIZE, PAGE_SIZE);
>>
>> - if (!acpi_realmode) {
>> + if (mem == -1L) {
>> printk(KERN_ERR "ACPI: Cannot allocate lowmem, S3 disabled.\n");
>> return;
>> }
>
> How is it better then old code?
could get range below 1M.
alloc_bootmem_low can not make sure get that below 1M.
init_memory_mapping could use below 1M as page table...
so need to get some buffer for acpi wakeup realmode code.
YH
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