kernel/mm/mmap.c

2003 	 * - gap_end   = vma->vm_start        >= info->low_limit  + length;
2009 	unsigned long length, low_limit, high_limit, gap_start, gap_end;
2021 	if (info->low_limit > high_limit)
2023 	low_limit = info->low_limit + length;
2035 		if (gap_end >= low_limit && vma->vm_rb.rb_left) {
2050 		if (gap_end >= low_limit &&
2088 	/* We found a suitable gap. Clip it with the original low_limit. */
2089 	if (gap_start < info->low_limit)
2090 		gap_start = info->low_limit;
2104 	unsigned long length, low_limit, high_limit, gap_start, gap_end;
2125 	if (info->low_limit > high_limit)
2127 	low_limit = info->low_limit + length;
2157 		if (gap_end < low_limit)
2199 	VM_BUG_ON(gap_end < info->low_limit);
2209  * - is contained within the [low_limit, high_limit) interval;
2265 	info.low_limit = mm->mmap_base;
2307 	info.low_limit = max(PAGE_SIZE, mmap_min_addr);
2323 		info.low_limit = TASK_UNMAPPED_BASE;