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Jaewon Kim 0adf530671 FROMLIST: memblock: handle overlapped reserved memory region 
It is not common, but defining an overlapped region is possible.
Actually memblock_add_range allows to overlap with existing ones.

The memsize currently does not handle this overlapped case. But this
patch tries to handle one overlapped case.

Here's the case.

There is an unknown memsize region, which means the region was removed
and not passed at bootloader stage. And there is a reserved memory
region defined in device tree which is overlapped with the unknown
region.

We expect that information in device tree make the unknown region clear.
This patch handle the overlapped region with following conditions.

1) The already existing overlapped region should be unknown and no-map.
2) The newly added region should have a name, and its region should be
same with or part of the existing one.

Here is an example.

Before this patch, memsize shows both overlapped region.

0x0ea000000-0x0ed900000 0x03900000 (   58368 KB ) nomap unusable overlapped
0x0ea000000-0x0f1400000 0x07400000 (  118784 KB ) nomap unusable unknown

After this patch, the overlapped region is named.

0x0ea000000-0x0ed900000 0x03900000 (   58368 KB ) nomap unusable overlapped
0x0e9b00000-0x0ea000000 0x00500000 (    5120 KB ) nomap unusable unknown

Bug: 340432773
Signed-off-by: Jaewon Kim <jaewon31.kim@samsung.com>
Link: https://lore.kernel.org/linux-mm/20240521023957.2587005-4-jaewon31.kim@samsung.com/
Change-Id: I7091eedcebd1f2f771124c157e5e00600b9a36fd
2024-12-17 20:36:47 +01:00
..
damon Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
kasan Revert "kasan: print the original fault addr when access invalid shadow" 2024-11-18 11:06:01 +01:00
kfence Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sec_mm Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
backing-dev.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
balloon_compaction.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cleancache.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cma.c mm/cma: use nth_page() in place of direct struct page manipulation 2024-11-18 11:43:25 +01:00
cma.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cma_debug.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cma_sysfs.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
compaction.c mm: Disable proactive compaction by default 2024-11-19 17:53:38 +01:00
debug.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
debug_page_ref.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
debug_vm_pgtable.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
dmapool.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
early_ioremap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
fadvise.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
failslab.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
filemap.c mm/lru: revise the comments of lru_lock 2024-11-19 17:58:24 +01:00
frame_vector.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
frontswap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
gup.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
gup_benchmark.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
highmem.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hmm.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hpa.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
huge_memory.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hugetlb.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hugetlb_cgroup.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hwpoison-inject.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
init-mm.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
internal.h mm: avoid unsafe VMA hook invocation when error arises on mmap hook 2024-12-17 13:20:51 +01:00
interval_tree.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
io_record.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ioremap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Kconfig zsmalloc: backport from 5994eabf3bbb 2024-11-19 17:44:14 +01:00
Kconfig.debug Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
khugepaged.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
kmemleak.c mm: kmemleak: Don't die when memory allocation fails 2024-11-19 17:44:35 +01:00
ksm.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
kzerod.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
list_lru.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
maccess.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
madvise.c Revert "fs: add file and path permissions helpers" 2024-11-19 13:30:21 +01:00
Makefile Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mapping_dirty_helpers.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
memblock.c FROMLIST: memblock: handle overlapped reserved memory region 2024-12-17 20:36:47 +01:00
memcontrol.c memcg_write_event_control(): fix a user-triggerable oops 2024-11-23 23:20:43 +01:00
memfd.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
memory-failure.c mm/memory-failure: fix an incorrect use of tail pages 2024-11-19 09:22:41 +01:00
memory.c mm: avoid leaving partial pfn mappings around in error case 2024-11-23 23:22:05 +01:00
memory_hotplug.c mm/memory_hotplug: use pfn math in place of direct struct page manipulation 2024-11-18 11:43:25 +01:00
mempolicy.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mempool.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
memremap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
memtest.c memtest: use {READ,WRITE}_ONCE in memory scanning 2024-11-19 09:22:36 +01:00
migrate.c mm/migrate: set swap entry values of THP tail pages properly. 2024-11-19 09:22:41 +01:00
mincore.c Revert "fs: add file and path permissions helpers" 2024-11-19 13:30:21 +01:00
mlock.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mm_init.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mmap.c mm: refactor arch_calc_vm_flag_bits() and arm64 MTE handling 2024-12-17 13:23:57 +01:00
mmu_gather.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mmu_notifier.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mmzone.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mprotect.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mremap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
msync.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
nommu.c mm: refactor arch_calc_vm_flag_bits() and arm64 MTE handling 2024-12-17 13:23:57 +01:00
oom_kill.c mm: oom_kill: Reduce some verbose logging 2024-11-19 17:44:31 +01:00
page-writeback.c Revert "kernel: sysctl: add init protection to common mm-related nodes" 2024-11-19 18:13:49 +01:00
page_alloc.c mm: add support for verifying page sanitization 2024-11-30 02:17:18 +01:00
page_counter.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_ext.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_idle.c mm: page_idle_get_page() does not need lru_lock 2024-11-19 17:58:44 +01:00
page_io.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_isolation.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_owner.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_pinner.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_poison.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_reporting.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_reporting.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_vma_mapped.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pagewalk.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
percpu-internal.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
percpu-km.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
percpu-stats.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
percpu-vm.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
percpu.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pgalloc-track.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pgtable-generic.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
process_vm_access.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ptdump.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
readahead.c vfs: fix readahead(2) on block devices 2024-11-18 11:42:46 +01:00
rmap.c mm/rmap: stop store reordering issue on page->mapping 2024-11-19 17:59:04 +01:00
rodata_test.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
shmem.c mm: refactor arch_calc_vm_flag_bits() and arm64 MTE handling 2024-12-17 13:23:57 +01:00
shuffle.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
shuffle.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
slab.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
slab.h bug on cache_from_obj !PageSlab check 2024-11-30 02:17:27 +01:00
slab_common.c Revert "add __ro_after_init to slab_nomerge and slab_state" 2024-12-03 19:57:00 +01:00
slob.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
slub.c bug on !PageSlab && !PageCompound in ksize 2024-11-30 02:17:21 +01:00
sparse-vmemmap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sparse.c mm/sparsemem: fix race in accessing memory_section->usage 2024-11-18 12:13:06 +01:00
swap.c mm/lru: move lock into lru_note_cost 2024-11-19 17:58:50 +01:00
swap_cgroup.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
swap_slots.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
swap_state.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
swapfile.c Revert "mm/swapfile: skip HugeTLB pages for unuse_vma" 2024-11-24 00:22:53 +01:00
truncate.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
usercopy.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
userfaultfd.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
util.c mm: avoid unsafe VMA hook invocation when error arises on mmap hook 2024-12-17 13:20:51 +01:00
vmacache.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
vmalloc.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
vmpressure.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
vmscan.c mm/vmscan: remove unnecessary lruvec adding 2024-11-19 17:58:57 +01:00
vmstat.c mm: Add likelihood labels to quiet_vmstat conditions 2024-12-17 20:32:50 +01:00
workingset.c mm/lru: move lock into lru_note_cost 2024-11-19 17:58:50 +01:00
z3fold.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
zbud.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
zpool.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
zsmalloc.c zsmalloc: backport from 5994eabf3bbb 2024-11-19 17:44:14 +01:00
zswap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00