* [PATCH v3 1/4] Make place for common balloon code
[not found] <20220822113747.3630776-1-alexander.atanasov@virtuozzo.com>
@ 2022-08-22 11:37 ` Alexander Atanasov
2022-08-22 15:58 ` Nadav Amit
2022-08-22 11:37 ` [PATCH v3 2/4] Enable balloon drivers to report inflated memory Alexander Atanasov
1 sibling, 1 reply; 3+ messages in thread
From: Alexander Atanasov @ 2022-08-22 11:37 UTC (permalink / raw)
To: Michael Ellerman, Nicholas Piggin, Christophe Leroy, Nadav Amit,
VMware PV-Drivers Reviewers, Arnd Bergmann, Greg Kroah-Hartman,
Michael S. Tsirkin, David Hildenbrand, Jason Wang, Andrew Morton
Cc: kernel, Alexander Atanasov, linux-kernel, linuxppc-dev,
virtualization, linux-mm
mm/balloon_compaction.c -> mm/balloon.c
File already contains code that is common along balloon
drivers so rename it to reflect its contents.
include/linux/balloon_compaction.h -> include/linux/balloon.h
Remove it from files which do not actually use it.
Drop externs from function delcarations.
Signed-off-by: Alexander Atanasov <alexander.atanasov@virtuozzo.com>
---
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} | 12 +++++-------
mm/Makefile | 2 +-
mm/{balloon_compaction.c => balloon.c} | 4 +---
mm/migrate.c | 1 -
mm/vmscan.c | 1 -
9 files changed, 12 insertions(+), 18 deletions(-)
rename include/linux/{balloon_compaction.h => balloon.h} (93%)
rename mm/{balloon_compaction.c => balloon.c} (99%)
diff --git a/MAINTAINERS b/MAINTAINERS
index 9d7f64dc0efe..98d6ff5f226d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -21494,8 +21494,8 @@ L: virtualization@lists.linux-foundation.org
S: Maintained
F: drivers/virtio/virtio_balloon.c
F: include/uapi/linux/virtio_balloon.h
-F: include/linux/balloon_compaction.h
-F: mm/balloon_compaction.c
+F: include/linux/balloon.h
+F: mm/balloon.c
VIRTIO CRYPTO DRIVER
M: Gonglei <arei.gonglei@huawei.com>
diff --git a/arch/powerpc/platforms/pseries/cmm.c b/arch/powerpc/platforms/pseries/cmm.c
index 5f4037c1d7fe..1d40f6416d6a 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 61a2be712bf7..91d4d2a285c5 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 3f78a3a1eb75..d0c27c680721 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 93%
rename from include/linux/balloon_compaction.h
rename to include/linux/balloon.h
index 5ca2d5699620..46ac8f61f607 100644
--- a/include/linux/balloon_compaction.h
+++ b/include/linux/balloon.h
@@ -1,7 +1,5 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
- * include/linux/balloon_compaction.h
- *
* Common interface definitions for making balloon pages movable by compaction.
*
* Balloon page migration makes use of the general non-lru movable page
@@ -59,13 +57,13 @@ struct balloon_dev_info {
struct page *page, enum migrate_mode mode);
};
-extern struct page *balloon_page_alloc(void);
-extern void balloon_page_enqueue(struct balloon_dev_info *b_dev_info,
+struct page *balloon_page_alloc(void);
+void balloon_page_enqueue(struct balloon_dev_info *b_dev_info,
struct page *page);
-extern struct page *balloon_page_dequeue(struct balloon_dev_info *b_dev_info);
-extern size_t balloon_page_list_enqueue(struct balloon_dev_info *b_dev_info,
+struct page *balloon_page_dequeue(struct balloon_dev_info *b_dev_info);
+size_t balloon_page_list_enqueue(struct balloon_dev_info *b_dev_info,
struct list_head *pages);
-extern size_t balloon_page_list_dequeue(struct balloon_dev_info *b_dev_info,
+size_t balloon_page_list_dequeue(struct balloon_dev_info *b_dev_info,
struct list_head *pages, size_t n_req_pages);
static inline void balloon_devinfo_init(struct balloon_dev_info *balloon)
diff --git a/mm/Makefile b/mm/Makefile
index 9a564f836403..550cb0663f50 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -112,7 +112,7 @@ obj-$(CONFIG_ZSMALLOC) += zsmalloc.o
obj-$(CONFIG_Z3FOLD) += z3fold.o
obj-$(CONFIG_GENERIC_EARLY_IOREMAP) += early_ioremap.o
obj-$(CONFIG_CMA) += cma.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 99%
rename from mm/balloon_compaction.c
rename to mm/balloon.c
index 22c96fed70b5..22b3e876bc78 100644
--- a/mm/balloon_compaction.c
+++ b/mm/balloon.c
@@ -1,7 +1,5 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
- * mm/balloon_compaction.c
- *
* Common interface for making balloon pages movable by compaction.
*
* Copyright (C) 2012, Red Hat, Inc. Rafael Aquini <aquini@redhat.com>
@@ -9,7 +7,7 @@
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/export.h>
-#include <linux/balloon_compaction.h>
+#include <linux/balloon.h>
static void balloon_page_enqueue_one(struct balloon_dev_info *b_dev_info,
struct page *page)
diff --git a/mm/migrate.c b/mm/migrate.c
index 6a1597c92261..a4c8bb334dde 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -41,7 +41,6 @@
#include <linux/pfn_t.h>
#include <linux/memremap.h>
#include <linux/userfaultfd_k.h>
-#include <linux/balloon_compaction.h>
#include <linux/page_idle.h>
#include <linux/page_owner.h>
#include <linux/sched/mm.h>
diff --git a/mm/vmscan.c b/mm/vmscan.c
index b2b1431352dc..f21d65b0d2e2 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -54,7 +54,6 @@
#include <asm/div64.h>
#include <linux/swapops.h>
-#include <linux/balloon_compaction.h>
#include <linux/sched/sysctl.h>
#include "internal.h"
--
2.31.1
^ permalink raw reply [flat|nested] 3+ messages in thread* [PATCH v3 2/4] Enable balloon drivers to report inflated memory
[not found] <20220822113747.3630776-1-alexander.atanasov@virtuozzo.com>
2022-08-22 11:37 ` [PATCH v3 1/4] Make place for common balloon code Alexander Atanasov
@ 2022-08-22 11:37 ` Alexander Atanasov
1 sibling, 0 replies; 3+ messages in thread
From: Alexander Atanasov @ 2022-08-22 11:37 UTC (permalink / raw)
To: Andrew Morton; +Cc: kernel, Alexander Atanasov, linux-kernel, linux-mm
Add counters to be updated by the balloon drivers.
Create balloon notifier to propagate changes.
Signed-off-by: Alexander Atanasov <alexander.atanasov@virtuozzo.com>
---
include/linux/balloon.h | 18 ++++++++++++++++++
mm/balloon.c | 36 ++++++++++++++++++++++++++++++++++++
2 files changed, 54 insertions(+)
diff --git a/include/linux/balloon.h b/include/linux/balloon.h
index 46ac8f61f607..59657da77d95 100644
--- a/include/linux/balloon.h
+++ b/include/linux/balloon.h
@@ -57,6 +57,24 @@ struct balloon_dev_info {
struct page *page, enum migrate_mode mode);
};
+extern atomic_long_t mem_balloon_inflated_total_kb;
+extern atomic_long_t mem_balloon_inflated_free_kb;
+
+void balloon_set_inflated_total(long inflated_kb);
+void balloon_set_inflated_free(long inflated_kb);
+
+#define BALLOON_CHANGED_TOTAL 0
+#define BALLOON_CHANGED_FREE 1
+
+int register_balloon_notifier(struct notifier_block *nb);
+void unregister_balloon_notifier(struct notifier_block *nb);
+
+#define balloon_notifier(fn, pri) ({ \
+ static struct notifier_block fn##_mem_nb __meminitdata =\
+ { .notifier_call = fn, .priority = pri }; \
+ register_balloon_notifier(&fn##_mem_nb); \
+})
+
struct page *balloon_page_alloc(void);
void balloon_page_enqueue(struct balloon_dev_info *b_dev_info,
struct page *page);
diff --git a/mm/balloon.c b/mm/balloon.c
index 22b3e876bc78..8e1d5855fef8 100644
--- a/mm/balloon.c
+++ b/mm/balloon.c
@@ -7,8 +7,44 @@
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/export.h>
+#include <linux/notifier.h>
#include <linux/balloon.h>
+atomic_long_t mem_balloon_inflated_total_kb = ATOMIC_LONG_INIT(0);
+atomic_long_t mem_balloon_inflated_free_kb = ATOMIC_LONG_INIT(0);
+SRCU_NOTIFIER_HEAD_STATIC(balloon_chain);
+
+int register_balloon_notifier(struct notifier_block *nb)
+{
+ return srcu_notifier_chain_register(&balloon_chain, nb);
+}
+EXPORT_SYMBOL(register_balloon_notifier);
+
+void unregister_balloon_notifier(struct notifier_block *nb)
+{
+ srcu_notifier_chain_unregister(&balloon_chain, nb);
+}
+EXPORT_SYMBOL(unregister_balloon_notifier);
+
+static int balloon_notify(unsigned long val)
+{
+ return srcu_notifier_call_chain(&balloon_chain, val, NULL);
+}
+
+void balloon_set_inflated_total(long inflated_kb)
+{
+ atomic_long_set(&mem_balloon_inflated_total_kb, inflated_kb);
+ balloon_notify(BALLOON_CHANGED_TOTAL);
+}
+EXPORT_SYMBOL(balloon_set_inflated_total);
+
+void balloon_set_inflated_free(long inflated_kb)
+{
+ atomic_long_set(&mem_balloon_inflated_free_kb, inflated_kb);
+ balloon_notify(BALLOON_CHANGED_FREE);
+}
+EXPORT_SYMBOL(balloon_set_inflated_free);
+
static void balloon_page_enqueue_one(struct balloon_dev_info *b_dev_info,
struct page *page)
{
--
2.31.1
^ permalink raw reply [flat|nested] 3+ messages in thread