On Thu, Jan 15, 2026 at 10:20:09AM +0100, David Hildenbrand (Red Hat) wrote: > Even without CONFIG_BALLOON_COMPACTION this infrastructure implements > basic list and page management for a memory balloon. > > Signed-off-by: David Hildenbrand (Red Hat) <[email protected]>
Seems sensible so: Reviewed-by: Lorenzo Stoakes <[email protected]> > --- > Documentation/core-api/mm-api.rst | 2 +- > MAINTAINERS | 4 ++-- > arch/powerpc/platforms/pseries/cmm.c | 2 +- > drivers/misc/vmw_balloon.c | 2 +- > drivers/virtio/virtio_balloon.c | 2 +- > include/linux/{balloon_compaction.h => balloon.h} | 11 +++++------ > mm/Makefile | 2 +- > mm/{balloon_compaction.c => balloon.c} | 7 +++---- > 8 files changed, 15 insertions(+), 17 deletions(-) > rename include/linux/{balloon_compaction.h => balloon.h} (92%) > rename mm/{balloon_compaction.c => balloon.c} (98%) > > diff --git a/Documentation/core-api/mm-api.rst > b/Documentation/core-api/mm-api.rst > index 68193a4cfcf52..aabdd3cba58e8 100644 > --- a/Documentation/core-api/mm-api.rst > +++ b/Documentation/core-api/mm-api.rst > @@ -130,5 +130,5 @@ More Memory Management Functions > .. kernel-doc:: mm/vmscan.c > .. kernel-doc:: mm/memory_hotplug.c > .. kernel-doc:: mm/mmu_notifier.c > -.. kernel-doc:: mm/balloon_compaction.c > +.. kernel-doc:: mm/balloon.c > .. kernel-doc:: mm/huge_memory.c > diff --git a/MAINTAINERS b/MAINTAINERS > index 0d044a58cbfe0..de8f89ca1149f 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -27536,9 +27536,9 @@ M: David Hildenbrand <[email protected]> > L: [email protected] > S: Maintained > F: drivers/virtio/virtio_balloon.c > -F: include/linux/balloon_compaction.h > +F: include/linux/balloon.h > F: include/uapi/linux/virtio_balloon.h > -F: mm/balloon_compaction.c > +F: mm/balloon.c > > VIRTIO BLOCK AND SCSI DRIVERS > M: "Michael S. Tsirkin" <[email protected]> > diff --git a/arch/powerpc/platforms/pseries/cmm.c > b/arch/powerpc/platforms/pseries/cmm.c > index 7fd8b3d7e7637..7a3c4922685ab 100644 > --- a/arch/powerpc/platforms/pseries/cmm.c > +++ b/arch/powerpc/platforms/pseries/cmm.c > @@ -19,7 +19,7 @@ > #include <linux/stringify.h> > #include <linux/swap.h> > #include <linux/device.h> > -#include <linux/balloon_compaction.h> > +#include <linux/balloon.h> > #include <asm/firmware.h> > #include <asm/hvcall.h> > #include <asm/mmu.h> > diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c > index 53e9335b6718c..7fd3f709108c2 100644 > --- a/drivers/misc/vmw_balloon.c > +++ b/drivers/misc/vmw_balloon.c > @@ -29,7 +29,7 @@ > #include <linux/rwsem.h> > #include <linux/slab.h> > #include <linux/spinlock.h> > -#include <linux/balloon_compaction.h> > +#include <linux/balloon.h> > #include <linux/vmw_vmci_defs.h> > #include <linux/vmw_vmci_api.h> > #include <asm/hypervisor.h> > diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c > index 6ae00de78b61b..de8041c3285a1 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -13,7 +13,7 @@ > #include <linux/delay.h> > #include <linux/slab.h> > #include <linux/module.h> > -#include <linux/balloon_compaction.h> > +#include <linux/balloon.h> > #include <linux/oom.h> > #include <linux/wait.h> > #include <linux/mm.h> > diff --git a/include/linux/balloon_compaction.h b/include/linux/balloon.h > similarity index 92% > rename from include/linux/balloon_compaction.h > rename to include/linux/balloon.h > index 7757e0e314fdb..82585542300d6 100644 > --- a/include/linux/balloon_compaction.h > +++ b/include/linux/balloon.h > @@ -1,8 +1,7 @@ > /* SPDX-License-Identifier: GPL-2.0 */ > /* > - * include/linux/balloon_compaction.h > - * > - * Common interface definitions for making balloon pages movable by > compaction. > + * Common interface for implementing a memory balloon, including support > + * for migration of pages inflated in a memory balloon. > * > * Balloon page migration makes use of the general "movable_ops page > migration" > * feature. > @@ -35,8 +34,8 @@ > * > * Copyright (C) 2012, Red Hat, Inc. Rafael Aquini <[email protected]> > */ > -#ifndef _LINUX_BALLOON_COMPACTION_H > -#define _LINUX_BALLOON_COMPACTION_H > +#ifndef _LINUX_BALLOON_H > +#define _LINUX_BALLOON_H > #include <linux/pagemap.h> > #include <linux/page-flags.h> > #include <linux/migrate.h> > @@ -75,4 +74,4 @@ static inline void balloon_devinfo_init(struct > balloon_dev_info *balloon) > balloon->migratepage = NULL; > balloon->adjust_managed_page_count = false; > } > -#endif /* _LINUX_BALLOON_COMPACTION_H */ > +#endif /* _LINUX_BALLOON_H */ > diff --git a/mm/Makefile b/mm/Makefile > index 9175f8cc65658..1e31e0a528dc1 100644 > --- a/mm/Makefile > +++ b/mm/Makefile > @@ -122,7 +122,7 @@ obj-$(CONFIG_CMA) += cma.o > obj-$(CONFIG_NUMA) += numa.o > obj-$(CONFIG_NUMA_MEMBLKS) += numa_memblks.o > obj-$(CONFIG_NUMA_EMU) += numa_emulation.o > -obj-$(CONFIG_MEMORY_BALLOON) += balloon_compaction.o > +obj-$(CONFIG_MEMORY_BALLOON) += balloon.o > obj-$(CONFIG_PAGE_EXTENSION) += page_ext.o > obj-$(CONFIG_PAGE_TABLE_CHECK) += page_table_check.o > obj-$(CONFIG_CMA_DEBUGFS) += cma_debug.o > diff --git a/mm/balloon_compaction.c b/mm/balloon.c > similarity index 98% > rename from mm/balloon_compaction.c > rename to mm/balloon.c > index f41e4a179a431..5734dae81e318 100644 > --- a/mm/balloon_compaction.c > +++ b/mm/balloon.c > @@ -1,15 +1,14 @@ > // SPDX-License-Identifier: GPL-2.0-only > /* > - * mm/balloon_compaction.c > - * > - * Common interface for making balloon pages movable by compaction. > + * Common interface for implementing a memory balloon, including support > + * for migration of pages inflated in a memory balloon. > * > * Copyright (C) 2012, Red Hat, Inc. Rafael Aquini <[email protected]> > */ > #include <linux/mm.h> > #include <linux/slab.h> > #include <linux/export.h> > -#include <linux/balloon_compaction.h> > +#include <linux/balloon.h> > > /* > * Lock protecting the balloon_dev_info of all devices. We don't really > -- > 2.52.0 >
