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David Hildenbrand 61ab03715d mm/balloon_compaction: convert balloon_page_delete() to balloon_page_finalize() 
[ Upstream commit 15504b1163 ]

Let's move the removal of the page from the balloon list into the single
caller, to remove the dependency on the PG_isolated flag and clarify
locking requirements.

Note that for now, balloon_page_delete() was used on two paths:

(1) Removing a page from the balloon for deflation through
    balloon_page_list_dequeue()
(2) Removing an isolated page from the balloon for migration in the
    per-driver migration handlers. Isolated pages were already removed from
    the balloon list during isolation.

So instead of relying on the flag, we can just distinguish both cases
directly and handle it accordingly in the caller.

We'll shuffle the operations a bit such that they logically make more
sense (e.g., remove from the list before clearing flags).

In balloon migration functions we can now move the balloon_page_finalize()
out of the balloon lock and perform the finalization just before dropping
the balloon reference.

Document that the page lock is currently required when modifying the
movability aspects of a page; hopefully we can soon decouple this from the
page lock.

Link: https://lkml.kernel.org/r/20250704102524.326966-3-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Eugenio Pé rez <eperezma@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Gregory Price <gourry@gourry.net>
Cc: Harry Yoo <harry.yoo@oracle.com>
Cc: "Huang, Ying" <ying.huang@linux.alibaba.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Jerrin Shaji George <jerrin.shaji-george@broadcom.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mathew Brost <matthew.brost@intel.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Cc: Qi Zheng <zhengqi.arch@bytedance.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Cc: xu xin <xu.xin16@zte.com.cn>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Stable-dep-of: 0da2ba35c0 ("powerpc/pseries/cmm: adjust BALLOON_MIGRATE when migrating pages")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2026-01-19 13:12:05 +01:00
..
kasan
kasan: print the original fault addr when access invalid shadow
2023-11-08 17:30:43 +01:00
backing-dev.c
writeback, cgroup: remove extra percpu_ref_exit()
2023-05-30 12:57:56 +01:00
balloon_compaction.c
mm/balloon_compaction: convert balloon_page_delete() to balloon_page_finalize()
2026-01-19 13:12:05 +01:00
cleancache.c
…
cma_debug.c
…
cma.c
mm/cma: use nth_page() in place of direct struct page manipulation
2023-11-28 16:54:58 +00:00
cma.h
…
compaction.c
mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations
2024-04-13 12:59:22 +02:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm/debug_vm_pgtable: remove pte entry from the page table
2022-02-08 18:30:35 +01:00
debug.c
mm, dump_page: rename head_mapcount() --> head_compound_mapcount()
2020-10-13 18:38:29 -07:00
dmapool.c
mm/dmapool.c: replace hard coded function name with __func__
2020-10-13 18:38:32 -07:00
early_ioremap.c
…
fadvise.c
mm, fadvise: improve the expensive remote LRU cache draining after FADV_DONTNEED
2020-10-13 18:38:29 -07:00
failslab.c
…
filemap.c
mm: drop the assumption that VM_SHARED always implies writable
2025-08-28 16:22:54 +02:00
frame_vector.c
media: vb2: frame_vector.c: replace WARN_ONCE with a comment
2023-10-10 21:53:33 +02:00
frontswap.c
…
gup_benchmark.c
mm/gup_benchmark: take the mmap lock around GUP
2020-10-18 09:27:09 -07:00
gup.c
mm/migration: return errno when isolate_huge_page failed
2023-02-15 17:22:21 +01:00
highmem.c
mm/highmem.c: clean up endif comments
2020-10-16 11:11:18 -07:00
hmm.c
mm/hmm: move pmd_to_hmm_pfn_flags() to the respective #ifdeffery
2025-08-28 16:22:38 +02:00
huge_memory.c
mm/huge_memory: fix dereferencing invalid pmd migration entry
2025-06-27 11:04:24 +01:00
hugetlb_cgroup.c
hugetlb_cgroup: fix imbalanced css_get and css_put pair for shared mappings
2021-03-30 14:31:54 +02:00
hugetlb.c
mm: hugetlb: avoid soft lockup when mprotect to large memory area
2025-10-29 14:01:08 +01:00
hwpoison-inject.c
mm,hwpoison-inject: don't pin for hwpoison_filter
2020-10-16 11:11:16 -07:00
init-mm.c
mm/gup: prevent gup_fast from racing with COW during fork
2020-12-30 11:53:54 +01:00
internal.h
mm: unconditionally close VMAs on error
2024-12-14 19:47:40 +01:00
interval_tree.c
…
ioremap.c
…
Kconfig
mm/zsmalloc.c: drop ZSMALLOC_PGTABLE_MAPPING
2020-12-06 10:19:07 -08:00
Kconfig.debug
…
khugepaged.c
mm/khugepaged: fix the address passed to notifier on testing young
2025-10-02 13:35:37 +02:00
kmemleak.c
mm/kmemleak: avoid deadlock by moving pr_warn() outside kmemleak_lock
2025-08-28 16:22:48 +02:00
ksm.c
ksm: fix potential missing rmap_item for stable_node
2021-05-19 10:13:07 +02:00
list_lru.c
mm: list_lru: set shrinker map bit when child nr_items is not zero
2020-12-06 10:19:07 -08:00
maccess.c
maccess: Fix writing offset in case of fault in strncpy_from_kernel_nofault()
2022-11-25 17:45:53 +01:00
madvise.c
mm: drop the assumption that VM_SHARED always implies writable
2025-08-28 16:22:54 +02:00
Makefile
mm,kmemleak-test.c: move kmemleak-test.c to samples dir
2020-10-13 18:38:27 -07:00
mapping_dirty_helpers.c
…
memblock.c
Revert "mm: Always release pages to the buddy allocator in memblock_free_late()."
2023-02-22 12:55:56 +01:00
memcontrol.c
memcg: always call cond_resched() after fn()
2025-06-04 14:37:08 +02:00
memfd.c
mm: reinstate ability to map write-sealed memfd mappings read-only
2025-08-28 16:22:55 +02:00
memory_hotplug.c
mm/memory_hotplug: use pfn math in place of direct struct page manipulation
2023-11-28 16:54:58 +00:00
memory-failure.c
mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory
2025-10-02 13:35:40 +02:00
memory.c
mm: fix apply_to_existing_page_range()
2025-05-02 07:41:09 +02:00
mempolicy.c
migrate: hugetlb: check for hugetlb shared PMD in node migration
2023-02-15 17:22:21 +01:00
mempool.c
mm/mempool: add 'else' to split mutually exclusive case
2020-10-13 18:38:34 -07:00
memremap.c
mm/memremap.c: map FS_DAX device memory as decrypted
2022-11-16 09:57:17 +01:00
memtest.c
memtest: use {READ,WRITE}_ONCE in memory scanning
2024-04-13 12:58:39 +02:00
migrate.c
mm/migrate_device: don't add folio to be freed to LRU in migrate_device_finalize()
2025-10-02 13:35:47 +02:00
mincore.c
fs: add file and path permissions helpers
2024-06-21 14:52:58 +02:00
mlock.c
…
mm_init.c
…
mmap.c
mm: reinstate ability to map write-sealed memfd mappings read-only
2025-08-28 16:22:55 +02:00
mmu_gather.c
mm/khugepaged: fix GUP-fast interaction by sending IPI
2022-12-14 11:31:55 +01:00
mmu_notifier.c
mm/mmu_notifier.c: fix race in mmu_interval_notifier_remove()
2022-04-27 13:53:54 +02:00
mmzone.c
arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL
2022-05-15 20:00:09 +02:00
mprotect.c
mm: don't try to NUMA-migrate COW pages that have other uses
2022-02-23 12:00:57 +01:00
mremap.c
mm/mremap: hold the rmap lock in write mode when moving page table entries.
2022-08-21 15:15:21 +02:00
msync.c
…
nommu.c
mm: refactor arch_calc_vm_flag_bits() and arm64 MTE handling
2024-12-14 19:47:40 +01:00
oom_kill.c
memcg: fix soft lockup in the OOM process
2025-03-13 12:47:26 +01:00
page_alloc.c
mm/mm_init: fix hash table order logging in alloc_large_system_hash()
2025-12-07 06:08:20 +09:00
page_counter.c
mm/page_counter: correct the obsolete func name in the comment of page_counter_try_charge()
2020-10-13 18:38:30 -07:00
page_ext.c
…
page_idle.c
…
page_io.c
mm: fix unexpected zeroed page mapping with zram swap
2022-04-20 09:23:25 +02:00
page_isolation.c
mm: rename page_order() to buddy_order()
2020-10-16 11:11:19 -07:00
page_owner.c
mm: rename page_order() to buddy_order()
2020-10-16 11:11:19 -07:00
page_poison.c
mm/page_poison.c: replace bool variable with static key
2020-10-16 11:11:17 -07:00
page_reporting.c
mm: rename page_order() to buddy_order()
2020-10-16 11:11:19 -07:00
page_reporting.h
…
page_vma_mapped.c
mm/thp: another PVMW_SYNC fix in page_vma_mapped_walk()
2021-06-30 08:47:29 -04:00
page-writeback.c
mm: fix ratelimit_pages update error in dirty_ratio_handler()
2025-06-27 11:04:14 +01:00
pagewalk.c
mm: pagewalk: Fix race between unmap and page walker
2022-09-08 11:11:38 +02:00
percpu-internal.h
percpu: make pcpu_nr_empty_pop_pages per chunk type
2021-04-14 08:42:03 +02:00
percpu-km.c
…
percpu-stats.c
percpu: make pcpu_nr_empty_pop_pages per chunk type
2021-04-14 08:42:03 +02:00
percpu-vm.c
…
percpu.c
percpu: make pcpu_nr_empty_pop_pages per chunk type
2021-04-14 08:42:03 +02:00
pgalloc-track.h
…
pgtable-generic.c
mm/thp: fix __split_huge_pmd_locked() on shmem migration entry
2021-06-30 08:47:26 -04:00
process_vm_access.c
mm/process_vm_access.c: include compat.h
2021-01-19 18:27:21 +01:00
ptdump.c
mm/ptdump: take the memory hotplug lock inside ptdump_walk_pgd()
2025-08-28 16:22:55 +02:00
readahead.c
vfs: fix readahead(2) on block devices
2023-11-20 11:06:44 +01:00
rmap.c
mm/rmap: Fix anon_vma->degree ambiguity leading to double-reuse
2022-09-05 10:28:56 +02:00
rodata_test.c
…
shmem.c
mm: update memfd seal write check to include F_SEAL_WRITE
2025-08-28 16:22:55 +02:00
shuffle.c
mm: rename page_order() to buddy_order()
2020-10-16 11:11:19 -07:00
shuffle.h
…
slab_common.c
mm: krealloc: Fix MTE false alarm in __do_krealloc
2024-11-17 14:59:40 +01:00
slab.c
mm/sl?b.c: remove ctor argument from kmem_cache_flags
2021-05-14 09:50:45 +02:00
slab.h
mm: extract might_alloc() debug check
2025-08-28 16:22:37 +02:00
slob.c
mm: extract might_alloc() debug check
2025-08-28 16:22:37 +02:00
slub.c
mm/slub: avoid accessing metadata when pointer is invalid in object_err()
2025-09-09 18:45:22 +02:00
sparse-vmemmap.c
…
sparse.c
mm/sparsemem: fix race in accessing memory_section->usage
2024-02-23 08:42:00 +01:00
swap_cgroup.c
…
swap_slots.c
mm/swap_slots.c: remove always zero and unused return value of enable_swap_slots_cache()
2020-10-13 18:38:30 -07:00
swap_state.c
mm: swap: get rid of livelock in swapin readahead
2022-03-23 09:13:27 +01:00
swap.c
mm: move call to compound_head() in release_pages()
2020-10-13 18:38:33 -07:00
swapfile.c
mm/swapfile: skip HugeTLB pages for unuse_vma
2024-10-22 15:39:24 +02:00
truncate.c
mm/thp: unmap_mapping_page() to fix THP truncate_cleanup_page()
2021-06-30 08:47:27 -04:00
usercopy.c
mm/usercopy: return 1 from hardened_usercopy __setup() handler
2022-04-08 14:40:43 +02:00
userfaultfd.c
userfaultfd: fix mmap_changing checking in mfill_atomic_hugetlb
2024-03-01 13:16:43 +01:00
util.c
mm: unconditionally close VMAs on error
2024-12-14 19:47:40 +01:00
vmacache.c
…
vmalloc.c
mm/vmalloc: leave lazy MMU mode on PTE mapping error
2025-08-28 16:22:29 +02:00
vmpressure.c
…
vmscan.c
mm: add missing release barrier on PGDAT_RECLAIM_LOCKED unlock
2025-05-02 07:40:56 +02:00
vmstat.c
arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL
2022-05-15 20:00:09 +02:00
workingset.c
Merge tag 'xarray-5.9' of git://git.infradead.org/users/willy/xarray
2020-10-20 14:39:37 -07:00
z3fold.c
mm/z3fold: use release_z3fold_page_locked() to release locked z3fold page
2021-07-14 16:56:51 +02:00
zbud.c
mm/zbud: remove redundant initialization
2020-10-13 18:38:34 -07:00
zpool.c
…
zsmalloc.c
minmax: make generic MIN() and MAX() macros available everywhere
2025-10-29 14:01:16 +01:00
zswap.c
…