iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mm/memory_hotplug: drop memblock_phys_free() call in try_remove_memory()

Browse Source 
The call for memblock_phys_free() in try_remove_memory() does not balance
any call to memblock_alloc() (or memblock_reserve() for that matter).

There are no memblock_reserve() calls in mm/memory_hotplug.c, no memblock
allocations possible after mm_core_init(), and even if memblock_add_node()
called from add_memory_resource() would need to allocate memory, that
memory would ba allocated from slab.

The patch f9126ab9241f ("memory-hotplug: fix wrong edge when hot add a new
node") that introduced that call to memblock_free() does not provide
adequate description why that was required and tinkering with memblock in
the context of memory hotplug on x86 seems bogus because x86 never kept
memblock after boot anyway.

Drop memblock_phys_free() call in try_remove_memory().

[rppt@kernel.org: rewrite the commit message]
Link: https://lkml.kernel.org/r/20240605082049.973242-1-rppt@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Jonathan Cameron 2024-06-05 11:20:49 +03:00 committed by Andrew Morton
parent 656fe3ee45
commit 7b09fa7ea4
1 changed files with 1 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
mm/memory_hotplug.c
View File

@ -2282,10 +2282,8 @@ static int __ref try_remove_memory(u64 start, u64 size)
remove_memory_blocks_and_altmaps(start, size);
}
if (IS_ENABLED(CONFIG_ARCH_KEEP_MEMBLOCK)) {
memblock_phys_free(start, size);
if (IS_ENABLED(CONFIG_ARCH_KEEP_MEMBLOCK))
memblock_remove(start, size);
}
release_mem_region_adjustable(start, size);