+	if (exec_folio_order()) {
+		unsigned long folio_size = PAGE_SIZE << exec_folio_order();
+
+		ret = __thp_get_unmapped_area(filp, addr, len, off, flags,
+					      folio_size, vm_flags);
+		if (ret)
+			return ret;
+	}
+

I noticed that even when the code segment of a user-space shared library
satisfies PMD_SIZE (32MB), it still doesn’t end up at a PMD-aligned virtual
address. This might be the fallback you mentioned. Adjusting p_align in the
ld.so ELF loader does work, though it also avoids extremely large PMD_SIZE
values (capped at ≤32M).

It would probably be better to skip the PMD_SIZE == folio_sz case here,
so we don’t end up calling __thp_get_unmapped_area() twice with the same
parameters.

Thanks,
Rui