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staging: erofs: clean up shrinker stuffs
- rename erofs_register_super / erofs_unregister_super to erofs_shrinker_register / erofs_shrinker_unregister; - fold the only erofs_shrink_workstation external call to erofs_shrinker_unregister; - localize erofs_shrink_workstation; - localize erofs_shrinker_info by introducing erofs_init_shrinker and erofs_exit_shrinker. Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190731155752.210602-10-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gao Xiang
Greg Kroah-Hartman
parent
beb5f3c4a1
commit
22fe04a77d
3 changed files with 61 additions and 56 deletions
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@ -72,10 +72,26 @@ typedef u64 erofs_off_t;
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typedef u32 erofs_blk_t;
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struct erofs_sb_info {
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#ifdef CONFIG_EROFS_FS_ZIP
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/* list for all registered superblocks, mainly for shrinker */
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struct list_head list;
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struct mutex umount_mutex;
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/* cluster size in bit shift */
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unsigned char clusterbits;
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/* the dedicated workstation for compression */
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struct radix_tree_root workstn_tree;
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/* threshold for decompression synchronously */
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unsigned int max_sync_decompress_pages;
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unsigned int shrinker_run_no;
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#ifdef EROFS_FS_HAS_MANAGED_CACHE
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struct inode *managed_cache;
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#endif
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#endif /* CONFIG_EROFS_FS_ZIP */
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u32 blocks;
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u32 meta_blkaddr;
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#ifdef CONFIG_EROFS_FS_XATTR
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@ -84,21 +100,6 @@ struct erofs_sb_info {
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/* inode slot unit size in bit shift */
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unsigned char islotbits;
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#ifdef CONFIG_EROFS_FS_ZIP
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/* cluster size in bit shift */
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unsigned char clusterbits;
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/* the dedicated workstation for compression */
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struct radix_tree_root workstn_tree;
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/* threshold for decompression synchronously */
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unsigned int max_sync_decompress_pages;
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#ifdef EROFS_FS_HAS_MANAGED_CACHE
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struct inode *managed_cache;
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#endif
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#endif
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u32 build_time_nsec;
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u64 build_time;
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@ -115,7 +116,6 @@ struct erofs_sb_info {
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char *dev_name;
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unsigned int mount_opt;
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unsigned int shrinker_run_no;
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#ifdef CONFIG_EROFS_FAULT_INJECTION
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struct erofs_fault_info fault_info; /* For fault injection */
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@ -253,15 +253,8 @@ static inline int erofs_wait_on_workgroup_freezed(struct erofs_workgroup *grp)
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/* page count of a compressed cluster */
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#define erofs_clusterpages(sbi) ((1 << (sbi)->clusterbits) / PAGE_SIZE)
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int __init z_erofs_init_zip_subsystem(void);
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void z_erofs_exit_zip_subsystem(void);
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#else
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#define EROFS_PCPUBUF_NR_PAGES 0
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/* dummy initializer/finalizer for the decompression subsystem */
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static inline int z_erofs_init_zip_subsystem(void) { return 0; }
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static inline void z_erofs_exit_zip_subsystem(void) {}
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#endif /* !CONFIG_EROFS_FS_ZIP */
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/* we strictly follow PAGE_SIZE and no buffer head yet */
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@ -525,8 +518,6 @@ int erofs_namei(struct inode *dir, struct qstr *name,
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extern const struct file_operations erofs_dir_fops;
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/* utils.c / zdata.c */
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extern struct shrinker erofs_shrinker_info;
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struct page *erofs_allocpage(struct list_head *pool, gfp_t gfp);
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#if (EROFS_PCPUBUF_NR_PAGES > 0)
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@ -544,20 +535,31 @@ static inline void *erofs_get_pcpubuf(unsigned int pagenr)
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#define erofs_put_pcpubuf(buf) do {} while (0)
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#endif
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#ifdef CONFIG_EROFS_FS_ZIP
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int erofs_workgroup_put(struct erofs_workgroup *grp);
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struct erofs_workgroup *erofs_find_workgroup(struct super_block *sb,
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pgoff_t index, bool *tag);
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int erofs_register_workgroup(struct super_block *sb,
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struct erofs_workgroup *grp, bool tag);
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unsigned long erofs_shrink_workstation(struct erofs_sb_info *sbi,
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unsigned long nr_shrink, bool cleanup);
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void erofs_workgroup_free_rcu(struct erofs_workgroup *grp);
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void erofs_shrinker_register(struct super_block *sb);
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void erofs_shrinker_unregister(struct super_block *sb);
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int __init erofs_init_shrinker(void);
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void erofs_exit_shrinker(void);
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int __init z_erofs_init_zip_subsystem(void);
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void z_erofs_exit_zip_subsystem(void);
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int erofs_try_to_free_all_cached_pages(struct erofs_sb_info *sbi,
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struct erofs_workgroup *egrp);
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int erofs_try_to_free_cached_page(struct address_space *mapping,
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struct page *page);
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void erofs_register_super(struct super_block *sb);
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void erofs_unregister_super(struct super_block *sb);
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#else
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static inline void erofs_shrinker_register(struct super_block *sb) {}
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static inline void erofs_shrinker_unregister(struct super_block *sb) {}
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static inline int erofs_init_shrinker(void) { return 0; }
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static inline void erofs_exit_shrinker(void) {}
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static inline int z_erofs_init_zip_subsystem(void) { return 0; }
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static inline void z_erofs_exit_zip_subsystem(void) {}
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#endif /* !CONFIG_EROFS_FS_ZIP */
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#endif /* __EROFS_INTERNAL_H */
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@ -458,7 +458,7 @@ static int erofs_read_super(struct super_block *sb,
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snprintf(sbi->dev_name, PATH_MAX, "%s", dev_name);
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sbi->dev_name[PATH_MAX - 1] = '\0';
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erofs_register_super(sb);
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erofs_shrinker_register(sb);
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if (!silent)
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infoln("mounted on %s with opts: %s.", dev_name,
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@ -502,20 +502,10 @@ static void erofs_put_super(struct super_block *sb)
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infoln("unmounted for %s", sbi->dev_name);
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__putname(sbi->dev_name);
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erofs_shrinker_unregister(sb);
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#ifdef EROFS_FS_HAS_MANAGED_CACHE
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iput(sbi->managed_cache);
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#endif
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mutex_lock(&sbi->umount_mutex);
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#ifdef CONFIG_EROFS_FS_ZIP
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/* clean up the compression space of this sb */
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erofs_shrink_workstation(EROFS_SB(sb), ~0UL, true);
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#endif
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erofs_unregister_super(sb);
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mutex_unlock(&sbi->umount_mutex);
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kfree(sbi);
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sb->s_fs_info = NULL;
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}
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@ -569,7 +559,7 @@ static int __init erofs_module_init(void)
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if (err)
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goto icache_err;
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err = register_shrinker(&erofs_shrinker_info);
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err = erofs_init_shrinker();
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if (err)
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goto shrinker_err;
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@ -587,7 +577,7 @@ static int __init erofs_module_init(void)
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fs_err:
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z_erofs_exit_zip_subsystem();
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zip_err:
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unregister_shrinker(&erofs_shrinker_info);
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erofs_exit_shrinker();
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shrinker_err:
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erofs_exit_inode_cache();
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icache_err:
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@ -598,7 +588,7 @@ static void __exit erofs_module_exit(void)
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{
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unregister_filesystem(&erofs_fs_type);
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z_erofs_exit_zip_subsystem();
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unregister_shrinker(&erofs_shrinker_info);
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erofs_exit_shrinker();
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erofs_exit_inode_cache();
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infoln("successfully finalize erofs");
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}
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@ -34,10 +34,10 @@ void *erofs_get_pcpubuf(unsigned int pagenr)
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}
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#endif
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#ifdef CONFIG_EROFS_FS_ZIP
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/* global shrink count (for all mounted EROFS instances) */
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static atomic_long_t erofs_global_shrink_cnt;
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#ifdef CONFIG_EROFS_FS_ZIP
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#define __erofs_workgroup_get(grp) atomic_inc(&(grp)->refcount)
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#define __erofs_workgroup_put(grp) atomic_dec(&(grp)->refcount)
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@ -215,9 +215,9 @@ static bool erofs_try_to_release_workgroup(struct erofs_sb_info *sbi,
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#endif
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unsigned long erofs_shrink_workstation(struct erofs_sb_info *sbi,
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unsigned long nr_shrink,
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bool cleanup)
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static unsigned long erofs_shrink_workstation(struct erofs_sb_info *sbi,
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unsigned long nr_shrink,
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bool cleanup)
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{
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pgoff_t first_index = 0;
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void *batch[PAGEVEC_SIZE];
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@ -250,8 +250,6 @@ unsigned long erofs_shrink_workstation(struct erofs_sb_info *sbi,
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return freed;
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}
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#endif
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/* protected by 'erofs_sb_list_lock' */
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static unsigned int shrinker_run_no;
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@ -259,7 +257,7 @@ static unsigned int shrinker_run_no;
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static DEFINE_SPINLOCK(erofs_sb_list_lock);
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static LIST_HEAD(erofs_sb_list);
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void erofs_register_super(struct super_block *sb)
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void erofs_shrinker_register(struct super_block *sb)
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{
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struct erofs_sb_info *sbi = EROFS_SB(sb);
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@ -270,11 +268,17 @@ void erofs_register_super(struct super_block *sb)
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spin_unlock(&erofs_sb_list_lock);
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}
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void erofs_unregister_super(struct super_block *sb)
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void erofs_shrinker_unregister(struct super_block *sb)
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{
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struct erofs_sb_info *const sbi = EROFS_SB(sb);
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mutex_lock(&sbi->umount_mutex);
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erofs_shrink_workstation(sbi, ~0UL, true);
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spin_lock(&erofs_sb_list_lock);
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list_del(&EROFS_SB(sb)->list);
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list_del(&sbi->list);
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spin_unlock(&erofs_sb_list_lock);
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mutex_unlock(&sbi->umount_mutex);
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}
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static unsigned long erofs_shrink_count(struct shrinker *shrink,
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@ -318,9 +322,7 @@ static unsigned long erofs_shrink_scan(struct shrinker *shrink,
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spin_unlock(&erofs_sb_list_lock);
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sbi->shrinker_run_no = run_no;
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#ifdef CONFIG_EROFS_FS_ZIP
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freed += erofs_shrink_workstation(sbi, nr, false);
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#endif
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spin_lock(&erofs_sb_list_lock);
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/* Get the next list element before we move this one */
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@ -340,9 +342,20 @@ static unsigned long erofs_shrink_scan(struct shrinker *shrink,
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return freed;
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}
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struct shrinker erofs_shrinker_info = {
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static struct shrinker erofs_shrinker_info = {
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.scan_objects = erofs_shrink_scan,
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.count_objects = erofs_shrink_count,
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.seeks = DEFAULT_SEEKS,
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};
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int __init erofs_init_shrinker(void)
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{
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return register_shrinker(&erofs_shrinker_info);
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}
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void erofs_exit_shrinker(void)
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{
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unregister_shrinker(&erofs_shrinker_info);
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}
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#endif /* !CONFIG_EROFS_FS_ZIP */
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