depends on MMU
bool
+# Don't discard allocated memory used to track "memory" and "reserved" memblocks
+# after early boot, so it can still be used to test for validity of memory.
+# Also, memblocks are updated with memory hot(un)plug.
config ARCH_KEEP_MEMBLOCK
bool
mem_hotplug_begin();
- /*
- * Add new range to memblock so that when hotadd_new_pgdat() is called
- * to allocate new pgdat, get_pfn_range_for_nid() will be able to find
- * this new range and calculate total pages correctly. The range will
- * be removed at hot-remove time.
- */
- memblock_add_node(start, size, nid);
+ if (IS_ENABLED(CONFIG_ARCH_KEEP_MEMBLOCK))
+ memblock_add_node(start, size, nid);
ret = __try_online_node(nid, false);
if (ret < 0)
/* rollback pgdat allocation and others */
if (new_node)
rollback_node_hotadd(nid);
- memblock_remove(start, size);
+ if (IS_ENABLED(CONFIG_ARCH_KEEP_MEMBLOCK))
+ memblock_remove(start, size);
mem_hotplug_done();
return ret;
}
mem_hotplug_begin();
arch_remove_memory(nid, start, size, NULL);
- memblock_free(start, size);
- memblock_remove(start, size);
+
+ if (IS_ENABLED(CONFIG_ARCH_KEEP_MEMBLOCK)) {
+ memblock_free(start, size);
+ memblock_remove(start, size);
+ }
+
__release_memory_resource(start, size);
try_offline_node(nid);