diff options
Diffstat (limited to 'arch/powerpc/platforms/pseries/cmm.c')
-rw-r--r-- | arch/powerpc/platforms/pseries/cmm.c | 75 |
1 files changed, 14 insertions, 61 deletions
diff --git a/arch/powerpc/platforms/pseries/cmm.c b/arch/powerpc/platforms/pseries/cmm.c index 91571841df8a..5f4037c1d7fe 100644 --- a/arch/powerpc/platforms/pseries/cmm.c +++ b/arch/powerpc/platforms/pseries/cmm.c @@ -19,14 +19,10 @@ #include <linux/stringify.h> #include <linux/swap.h> #include <linux/device.h> -#include <linux/mount.h> -#include <linux/pseudo_fs.h> -#include <linux/magic.h> #include <linux/balloon_compaction.h> #include <asm/firmware.h> #include <asm/hvcall.h> #include <asm/mmu.h> -#include <asm/pgalloc.h> #include <linux/uaccess.h> #include <linux/memory.h> #include <asm/plpar_wrappers.h> @@ -476,8 +472,6 @@ static struct notifier_block cmm_reboot_nb = { static int cmm_memory_cb(struct notifier_block *self, unsigned long action, void *arg) { - int ret = 0; - switch (action) { case MEM_GOING_OFFLINE: mutex_lock(&hotplug_mutex); @@ -494,7 +488,7 @@ static int cmm_memory_cb(struct notifier_block *self, break; } - return notifier_from_errno(ret); + return NOTIFY_OK; } static struct notifier_block cmm_mem_nb = { @@ -503,19 +497,6 @@ static struct notifier_block cmm_mem_nb = { }; #ifdef CONFIG_BALLOON_COMPACTION -static struct vfsmount *balloon_mnt; - -static int cmm_init_fs_context(struct fs_context *fc) -{ - return init_pseudo(fc, PPC_CMM_MAGIC) ? 0 : -ENOMEM; -} - -static struct file_system_type balloon_fs = { - .name = "ppc-cmm", - .init_fs_context = cmm_init_fs_context, - .kill_sb = kill_anon_super, -}; - static int cmm_migratepage(struct balloon_dev_info *b_dev_info, struct page *newpage, struct page *page, enum migrate_mode mode) @@ -539,6 +520,16 @@ static int cmm_migratepage(struct balloon_dev_info *b_dev_info, /* balloon page list reference */ get_page(newpage); + /* + * When we migrate a page to a different zone, we have to fixup the + * count of both involved zones as we adjusted the managed page count + * when inflating. + */ + if (page_zone(page) != page_zone(newpage)) { + adjust_managed_page_count(page, 1); + adjust_managed_page_count(newpage, -1); + } + spin_lock_irqsave(&b_dev_info->pages_lock, flags); balloon_page_insert(b_dev_info, newpage); balloon_page_delete(page); @@ -557,47 +548,13 @@ static int cmm_migratepage(struct balloon_dev_info *b_dev_info, return MIGRATEPAGE_SUCCESS; } -static int cmm_balloon_compaction_init(void) +static void cmm_balloon_compaction_init(void) { - int rc; - balloon_devinfo_init(&b_dev_info); b_dev_info.migratepage = cmm_migratepage; - - balloon_mnt = kern_mount(&balloon_fs); - if (IS_ERR(balloon_mnt)) { - rc = PTR_ERR(balloon_mnt); - balloon_mnt = NULL; - return rc; - } - - b_dev_info.inode = alloc_anon_inode(balloon_mnt->mnt_sb); - if (IS_ERR(b_dev_info.inode)) { - rc = PTR_ERR(b_dev_info.inode); - b_dev_info.inode = NULL; - kern_unmount(balloon_mnt); - balloon_mnt = NULL; - return rc; - } - - b_dev_info.inode->i_mapping->a_ops = &balloon_aops; - return 0; -} -static void cmm_balloon_compaction_deinit(void) -{ - if (b_dev_info.inode) - iput(b_dev_info.inode); - b_dev_info.inode = NULL; - kern_unmount(balloon_mnt); - balloon_mnt = NULL; } #else /* CONFIG_BALLOON_COMPACTION */ -static int cmm_balloon_compaction_init(void) -{ - return 0; -} - -static void cmm_balloon_compaction_deinit(void) +static void cmm_balloon_compaction_init(void) { } #endif /* CONFIG_BALLOON_COMPACTION */ @@ -615,9 +572,7 @@ static int cmm_init(void) if (!firmware_has_feature(FW_FEATURE_CMO) && !simulate) return -EOPNOTSUPP; - rc = cmm_balloon_compaction_init(); - if (rc) - return rc; + cmm_balloon_compaction_init(); rc = register_oom_notifier(&cmm_oom_nb); if (rc < 0) @@ -651,7 +606,6 @@ out_reboot_notifier: out_oom_notifier: unregister_oom_notifier(&cmm_oom_nb); out_balloon_compaction: - cmm_balloon_compaction_deinit(); return rc; } @@ -670,7 +624,6 @@ static void cmm_exit(void) unregister_memory_notifier(&cmm_mem_nb); cmm_free_pages(atomic_long_read(&loaned_pages)); cmm_unregister_sysfs(&cmm_dev); - cmm_balloon_compaction_deinit(); } /** |