provide BDI constructor/destructor hooks Signed-off-by: Peter Zijlstra --- block/ll_rw_blk.c | 13 ++++++++++--- drivers/block/rd.c | 20 +++++++++++++++++++- drivers/char/mem.c | 5 +++++ fs/char_dev.c | 1 + fs/configfs/configfs_internal.h | 2 ++ fs/configfs/inode.c | 8 ++++++++ fs/configfs/mount.c | 9 +++++++++ fs/fuse/inode.c | 9 +++++++++ fs/hugetlbfs/inode.c | 9 ++++++++- fs/nfs/client.c | 6 ++++++ fs/ocfs2/dlm/dlmfs.c | 9 ++++++++- fs/ramfs/inode.c | 12 +++++++++++- fs/sysfs/inode.c | 5 +++++ fs/sysfs/mount.c | 4 ++++ fs/sysfs/sysfs.h | 1 + include/linux/backing-dev.h | 8 ++++++++ mm/readahead.c | 6 ++++++ mm/shmem.c | 6 ++++++ mm/swap.c | 4 ++++ 19 files changed, 130 insertions(+), 7 deletions(-) Index: linux-2.6/block/ll_rw_blk.c =================================================================== --- linux-2.6.orig/block/ll_rw_blk.c +++ linux-2.6/block/ll_rw_blk.c @@ -1780,6 +1780,7 @@ static void blk_release_queue(struct kob blk_trace_shutdown(q); + bdi_destroy(&q->backing_dev_info); kmem_cache_free(requestq_cachep, q); } @@ -1833,21 +1834,27 @@ static struct kobj_type queue_ktype; struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id) { struct request_queue *q; + int err; q = kmem_cache_alloc_node(requestq_cachep, gfp_mask | __GFP_ZERO, node_id); if (!q) return NULL; + q->backing_dev_info.unplug_io_fn = blk_backing_dev_unplug; + q->backing_dev_info.unplug_io_data = q; + err = bdi_init(&q->backing_dev_info); + if (err) { + kmem_cache_free(requestq_cachep, q); + return NULL; + } + init_timer(&q->unplug_timer); snprintf(q->kobj.name, KOBJ_NAME_LEN, "%s", "queue"); q->kobj.ktype = &queue_ktype; kobject_init(&q->kobj); - q->backing_dev_info.unplug_io_fn = blk_backing_dev_unplug; - q->backing_dev_info.unplug_io_data = q; - mutex_init(&q->sysfs_lock); return q; Index: linux-2.6/drivers/block/rd.c =================================================================== --- linux-2.6.orig/drivers/block/rd.c +++ linux-2.6/drivers/block/rd.c @@ -411,6 +411,9 @@ static void __exit rd_cleanup(void) blk_cleanup_queue(rd_queue[i]); } unregister_blkdev(RAMDISK_MAJOR, "ramdisk"); + + bdi_destroy(&rd_file_backing_dev_info); + bdi_destroy(&rd_backing_dev_info); } /* @@ -419,7 +422,19 @@ static void __exit rd_cleanup(void) static int __init rd_init(void) { int i; - int err = -ENOMEM; + int err; + + err = bdi_init(&rd_backing_dev_info); + if (err) + goto out2; + + err = bdi_init(&rd_file_backing_dev_info); + if (err) { + bdi_destroy(&rd_backing_dev_info); + goto out2; + } + + err = -ENOMEM; if (rd_blocksize > PAGE_SIZE || rd_blocksize < 512 || (rd_blocksize & (rd_blocksize-1))) { @@ -473,6 +488,9 @@ out: put_disk(rd_disks[i]); blk_cleanup_queue(rd_queue[i]); } + bdi_destroy(&rd_backing_dev_info); + bdi_destroy(&rd_file_backing_dev_info); +out2: return err; } Index: linux-2.6/drivers/char/mem.c =================================================================== --- linux-2.6.orig/drivers/char/mem.c +++ linux-2.6/drivers/char/mem.c @@ -984,6 +984,11 @@ static struct class *mem_class; static int __init chr_dev_init(void) { int i; + int err; + + err = bdi_init(&zero_bdi); + if (err) + return err; if (register_chrdev(MEM_MAJOR,"mem",&memory_fops)) printk("unable to get major %d for memory devs\n", MEM_MAJOR); Index: linux-2.6/fs/char_dev.c =================================================================== --- linux-2.6.orig/fs/char_dev.c +++ linux-2.6/fs/char_dev.c @@ -545,6 +545,7 @@ static struct kobject *base_probe(dev_t void __init chrdev_init(void) { cdev_map = kobj_map_init(base_probe, &chrdevs_lock); + bdi_init(&directly_mappable_cdev_bdi); } Index: linux-2.6/fs/fuse/inode.c =================================================================== --- linux-2.6.orig/fs/fuse/inode.c +++ linux-2.6/fs/fuse/inode.c @@ -418,6 +418,7 @@ static int fuse_show_options(struct seq_ static struct fuse_conn *new_conn(void) { struct fuse_conn *fc; + int err; fc = kzalloc(sizeof(*fc), GFP_KERNEL); if (fc) { @@ -433,10 +434,17 @@ static struct fuse_conn *new_conn(void) atomic_set(&fc->num_waiting, 0); fc->bdi.ra_pages = (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE; fc->bdi.unplug_io_fn = default_unplug_io_fn; + err = bdi_init(&fc->bdi); + if (err) { + kfree(fc); + fc = NULL; + goto out; + } fc->reqctr = 0; fc->blocked = 1; get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key)); } +out: return fc; } @@ -446,6 +454,7 @@ void fuse_conn_put(struct fuse_conn *fc) if (fc->destroy_req) fuse_request_free(fc->destroy_req); mutex_destroy(&fc->inst_mutex); + bdi_destroy(&fc->bdi); kfree(fc); } } Index: linux-2.6/fs/nfs/client.c =================================================================== --- linux-2.6.orig/fs/nfs/client.c +++ linux-2.6/fs/nfs/client.c @@ -632,6 +632,7 @@ static void nfs_server_set_fsinfo(struct if (server->rsize > NFS_MAX_FILE_IO_SIZE) server->rsize = NFS_MAX_FILE_IO_SIZE; server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; + server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; if (server->wsize > max_rpc_payload) @@ -682,6 +683,10 @@ static int nfs_probe_fsinfo(struct nfs_s goto out_error; nfs_server_set_fsinfo(server, &fsinfo); + error = bdi_init(&server->backing_dev_info); + if (error) + goto out_error; + /* Get some general file system info */ if (server->namelen == 0) { @@ -761,6 +766,7 @@ void nfs_free_server(struct nfs_server * nfs_put_client(server->nfs_client); nfs_free_iostats(server->io_stats); + bdi_destroy(&server->backing_dev_info); kfree(server); nfs_release_automount_timer(); dprintk("<-- nfs_free_server()\n"); Index: linux-2.6/include/linux/backing-dev.h =================================================================== --- linux-2.6.orig/include/linux/backing-dev.h +++ linux-2.6/include/linux/backing-dev.h @@ -34,6 +34,14 @@ struct backing_dev_info { void *unplug_io_data; }; +static inline int bdi_init(struct backing_dev_info *bdi) +{ + return 0; +} + +static inline void bdi_destroy(struct backing_dev_info *bdi) +{ +} /* * Flags in backing_dev_info::capability Index: linux-2.6/fs/hugetlbfs/inode.c =================================================================== --- linux-2.6.orig/fs/hugetlbfs/inode.c +++ linux-2.6/fs/hugetlbfs/inode.c @@ -965,11 +965,15 @@ static int __init init_hugetlbfs_fs(void int error; struct vfsmount *vfsmount; + error = bdi_init(&hugetlbfs_backing_dev_info); + if (error) + return error; + hugetlbfs_inode_cachep = kmem_cache_create("hugetlbfs_inode_cache", sizeof(struct hugetlbfs_inode_info), 0, 0, init_once); if (hugetlbfs_inode_cachep == NULL) - return -ENOMEM; + return out2; error = register_filesystem(&hugetlbfs_fs_type); if (error) @@ -987,6 +991,8 @@ static int __init init_hugetlbfs_fs(void out: if (error) kmem_cache_destroy(hugetlbfs_inode_cachep); + out2: + bdi_destroy(&hugetlbfs_backing_dev_info); return error; } @@ -994,6 +1000,7 @@ static void __exit exit_hugetlbfs_fs(voi { kmem_cache_destroy(hugetlbfs_inode_cachep); unregister_filesystem(&hugetlbfs_fs_type); + bdi_destroy(&hugetlbfs_backing_dev_info); } module_init(init_hugetlbfs_fs) Index: linux-2.6/fs/ocfs2/dlm/dlmfs.c =================================================================== --- linux-2.6.orig/fs/ocfs2/dlm/dlmfs.c +++ linux-2.6/fs/ocfs2/dlm/dlmfs.c @@ -588,13 +588,17 @@ static int __init init_dlmfs_fs(void) dlmfs_print_version(); + status = bdi_init(&dlmfs_backing_dev_info); + if (status) + return status; + dlmfs_inode_cache = kmem_cache_create("dlmfs_inode_cache", sizeof(struct dlmfs_inode_private), 0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| SLAB_MEM_SPREAD), dlmfs_init_once); if (!dlmfs_inode_cache) - return -ENOMEM; + goto bail; cleanup_inode = 1; user_dlm_worker = create_singlethread_workqueue("user_dlm"); @@ -611,6 +615,7 @@ bail: kmem_cache_destroy(dlmfs_inode_cache); if (cleanup_worker) destroy_workqueue(user_dlm_worker); + bdi_destroy(&dlmfs_backing_dev_info); } else printk("OCFS2 User DLM kernel interface loaded\n"); return status; @@ -624,6 +629,8 @@ static void __exit exit_dlmfs_fs(void) destroy_workqueue(user_dlm_worker); kmem_cache_destroy(dlmfs_inode_cache); + + bdi_destroy(&dlmfs_backing_dev_info); } MODULE_AUTHOR("Oracle"); Index: linux-2.6/fs/configfs/configfs_internal.h =================================================================== --- linux-2.6.orig/fs/configfs/configfs_internal.h +++ linux-2.6/fs/configfs/configfs_internal.h @@ -56,6 +56,8 @@ extern int configfs_is_root(struct confi extern struct inode * configfs_new_inode(mode_t mode, struct configfs_dirent *); extern int configfs_create(struct dentry *, int mode, int (*init)(struct inode *)); +extern int configfs_inode_init(void); +extern void configfs_inode_exit(void); extern int configfs_create_file(struct config_item *, const struct configfs_attribute *); extern int configfs_make_dirent(struct configfs_dirent *, Index: linux-2.6/fs/configfs/inode.c =================================================================== --- linux-2.6.orig/fs/configfs/inode.c +++ linux-2.6/fs/configfs/inode.c @@ -256,4 +256,12 @@ void configfs_hash_and_remove(struct den mutex_unlock(&dir->d_inode->i_mutex); } +int __init configfs_inode_init(void) +{ + return bdi_init(&configfs_backing_dev_info); +} +void __exit configfs_inode_exit(void) +{ + bdi_destroy(&configfs_backing_dev_info); +} Index: linux-2.6/fs/configfs/mount.c =================================================================== --- linux-2.6.orig/fs/configfs/mount.c +++ linux-2.6/fs/configfs/mount.c @@ -154,8 +154,16 @@ static int __init configfs_init(void) subsystem_unregister(&config_subsys); kmem_cache_destroy(configfs_dir_cachep); configfs_dir_cachep = NULL; + goto out; } + err = configfs_inode_init(); + if (err) { + unregister_filesystem(&configfs_fs_type); + subsystem_unregister(&config_subsys); + kmem_cache_destroy(configfs_dir_cachep); + configfs_dir_cachep = NULL; + } out: return err; } @@ -166,6 +174,7 @@ static void __exit configfs_exit(void) subsystem_unregister(&config_subsys); kmem_cache_destroy(configfs_dir_cachep); configfs_dir_cachep = NULL; + configfs_inode_exit(); } MODULE_AUTHOR("Oracle"); Index: linux-2.6/fs/ramfs/inode.c =================================================================== --- linux-2.6.orig/fs/ramfs/inode.c +++ linux-2.6/fs/ramfs/inode.c @@ -223,7 +223,17 @@ module_exit(exit_ramfs_fs) int __init init_rootfs(void) { - return register_filesystem(&rootfs_fs_type); + int err; + + err = bdi_init(&ramfs_backing_dev_info); + if (err) + return err; + + err = register_filesystem(&rootfs_fs_type); + if (err) + bdi_destroy(&ramfs_backing_dev_info); + + return err; } MODULE_LICENSE("GPL"); Index: linux-2.6/fs/sysfs/inode.c =================================================================== --- linux-2.6.orig/fs/sysfs/inode.c +++ linux-2.6/fs/sysfs/inode.c @@ -34,6 +34,11 @@ static const struct inode_operations sys .setattr = sysfs_setattr, }; +int __init sysfs_inode_init(void) +{ + return bdi_init(&sysfs_backing_dev_info); +} + int sysfs_setattr(struct dentry * dentry, struct iattr * iattr) { struct inode * inode = dentry->d_inode; Index: linux-2.6/fs/sysfs/mount.c =================================================================== --- linux-2.6.orig/fs/sysfs/mount.c +++ linux-2.6/fs/sysfs/mount.c @@ -90,6 +90,10 @@ int __init sysfs_init(void) if (!sysfs_dir_cachep) goto out; + err = sysfs_inode_init(); + if (err) + goto out_err; + err = register_filesystem(&sysfs_fs_type); if (!err) { sysfs_mount = kern_mount(&sysfs_fs_type); Index: linux-2.6/fs/sysfs/sysfs.h =================================================================== --- linux-2.6.orig/fs/sysfs/sysfs.h +++ linux-2.6/fs/sysfs/sysfs.h @@ -78,6 +78,7 @@ extern int sysfs_addrm_finish(struct sys extern struct inode * sysfs_get_inode(struct sysfs_dirent *sd); extern void sysfs_instantiate(struct dentry *dentry, struct inode *inode); +extern int sysfs_inode_init(void); extern void release_sysfs_dirent(struct sysfs_dirent * sd); extern struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd, Index: linux-2.6/mm/shmem.c =================================================================== --- linux-2.6.orig/mm/shmem.c +++ linux-2.6/mm/shmem.c @@ -2460,6 +2460,10 @@ static int __init init_tmpfs(void) { int error; + error = bdi_init(&shmem_backing_dev_info); + if (error) + goto out4; + error = init_inodecache(); if (error) goto out3; @@ -2484,6 +2488,8 @@ out1: out2: destroy_inodecache(); out3: + bdi_destroy(&shmem_backing_dev_info); +out4: shm_mnt = ERR_PTR(error); return error; } Index: linux-2.6/mm/swap.c =================================================================== --- linux-2.6.orig/mm/swap.c +++ linux-2.6/mm/swap.c @@ -548,6 +548,10 @@ void __init swap_setup(void) { unsigned long megs = num_physpages >> (20 - PAGE_SHIFT); +#ifdef CONFIG_SWAP + bdi_init(swapper_space.backing_dev_info); +#endif + /* Use a smaller cluster for small-memory machines */ if (megs < 16) page_cluster = 2; Index: linux-2.6/mm/readahead.c =================================================================== --- linux-2.6.orig/mm/readahead.c +++ linux-2.6/mm/readahead.c @@ -234,6 +234,12 @@ unsigned long max_sane_readahead(unsigne + node_page_state(numa_node_id(), NR_FREE_PAGES)) / 2); } +static int __init readahead_init(void) +{ + return bdi_init(&default_backing_dev_info); +} +subsys_initcall(readahead_init); + /* * Submit IO for the read-ahead request in file_ra_state. */ --