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| author | David Hildenbrand (Red Hat) <david@kernel.org> | 2026-01-20 02:01:24 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-02-01 01:22:34 +0300 |
| commit | 631eb2282630dc0cccd8284c4ea37e29d17d1f48 (patch) | |
| tree | c63e418314c67236641427db6a032ec54ef0b266 | |
| parent | 03d6a2f68419b808d51ba39c84aedd6e9a6a92d8 (diff) | |
| download | linux-631eb2282630dc0cccd8284c4ea37e29d17d1f48.tar.xz | |
mm/balloon_compaction: assert that the balloon_pages_lock is held
Let's add some sanity checks for holding the balloon_pages_lock when we're
effectively inflating/deflating a page.
Link: https://lkml.kernel.org/r/20260119230133.3551867-17-david@kernel.org
Signed-off-by: David Hildenbrand (Red Hat) <david@kernel.org>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Eugenio Pérez <eperezma@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Jerrin Shaji George <jerrin.shaji-george@broadcom.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: SeongJae Park <sj@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/balloon_compaction.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/balloon_compaction.c b/mm/balloon_compaction.c index 30fa7ee8e1f3..f77b305b0459 100644 --- a/mm/balloon_compaction.c +++ b/mm/balloon_compaction.c @@ -28,6 +28,7 @@ static DEFINE_SPINLOCK(balloon_pages_lock); static void balloon_page_insert(struct balloon_dev_info *balloon, struct page *page) { + lockdep_assert_held(&balloon_pages_lock); __SetPageOffline(page); if (IS_ENABLED(CONFIG_BALLOON_COMPACTION)) { SetPageMovableOps(page); @@ -45,6 +46,7 @@ static void balloon_page_insert(struct balloon_dev_info *balloon, */ static void balloon_page_finalize(struct page *page) { + lockdep_assert_held(&balloon_pages_lock); if (IS_ENABLED(CONFIG_BALLOON_COMPACTION)) set_page_private(page, 0); /* PageOffline is sticky until the page is freed to the buddy. */ |