On Thu, 2009-11-12 at 03:05 +0800, Yinghai Lu wrote: > ykzhao wrote: > > On Wed, 2009-11-11 at 10:27 +0800, Yinghai Lu wrote: > >> try to find_e820_area/reserve_early, and call acpi_reserve_memory early > >> > >> to get area is below 1M > >> > >> -v2: change function name to acpi_reserve_wakeup_memory according to Rafael > > It seems that the function of find_e820_area is called in several > > places. > > >Initmem_init: bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, > > bootmap_size, PAGE_SIZE); > > > > If we also call it in the acpi_reserve_wakeup_memory, do we get the same > > base address as that obtained in initmem_init? > > no. find_e820_area will check the reserve res array that could be updated by reserve_early. It will check the reserved region array when calling the function of find_e820_area. But it seems that the array is not updated when the find_e820_area is called in the function of initmem_init. At the same time the acpi_reserve_bootmem is called after initializing the boot mem allocator. Can we continue to reserve some region by using find_e820_area? thanks. > > YH -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
