@@ -1452,16 +1452,20 @@ static unsigned long probe_memory_block_size(void)
}
/*
- * Use max block size to minimize overhead on bare metal, where
- * alignment for memory hotplug isn't a concern.
+ * When hotplug alignment is not a concern, maximize blocksize
+ * to minimize overhead. Otherwise, align to the lesser of advice
+ * alignment and end of memory alignment.
*/
- if (!boot_cpu_has(X86_FEATURE_HYPERVISOR)) {
+ bz = memory_block_advised_max_size();
+ if (!bz) {
bz = MAX_BLOCK_SIZE;
- goto done;
- }
+ if (!boot_cpu_has(X86_FEATURE_HYPERVISOR))
+ goto done;
+ } else
+ bz = max(min(bz, MAX_BLOCK_SIZE), MIN_MEMORY_BLOCK_SIZE);
/* Find the largest allowed block size that aligns to memory end */
- for (bz = MAX_BLOCK_SIZE; bz > MIN_MEMORY_BLOCK_SIZE; bz >>= 1) {
+ for (; bz > MIN_MEMORY_BLOCK_SIZE; bz >>= 1) {
if (IS_ALIGNED(boot_mem_end, bz))
break;
}