[PATCH 07/17] mm: bdi init hooks

From: Peter Zijlstra
Date: Thu Jun 14 2007 - 18:13:36 EST

provide BDI constructor/destructor hooks

Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
---
block/ll_rw_blk.c | 2 ++
drivers/block/rd.c | 6 ++++++
drivers/char/mem.c | 2 ++
drivers/mtd/mtdcore.c | 5 +++++
fs/char_dev.c | 1 +
fs/configfs/configfs_internal.h | 2 ++
fs/configfs/inode.c | 8 ++++++++
fs/configfs/mount.c | 2 ++
fs/fuse/inode.c | 2 ++
fs/hugetlbfs/inode.c | 3 +++
fs/nfs/client.c | 3 +++
fs/ocfs2/dlm/dlmfs.c | 6 +++++-
fs/ramfs/inode.c | 1 +
fs/sysfs/inode.c | 5 +++++
fs/sysfs/mount.c | 2 ++
fs/sysfs/sysfs.h | 1 +
include/linux/backing-dev.h | 7 +++++++
mm/readahead.c | 7 +++++++
mm/shmem.c | 1 +
mm/swap.c | 4 ++++
20 files changed, 69 insertions(+), 1 deletion(-)

Index: linux-2.6/block/ll_rw_blk.c
===================================================================
--- linux-2.6.orig/block/ll_rw_blk.c 2007-06-07 08:57:49.000000000 +0200
+++ linux-2.6/block/ll_rw_blk.c 2007-06-07 16:11:16.000000000 +0200
@@ -1774,6 +1774,7 @@ static void blk_release_queue(struct kob

blk_trace_shutdown(q);

+ bdi_destroy(&q->backing_dev_info);
kmem_cache_free(requestq_cachep, q);
}

@@ -1841,6 +1842,7 @@ request_queue_t *blk_alloc_queue_node(gf

q->backing_dev_info.unplug_io_fn = blk_backing_dev_unplug;
q->backing_dev_info.unplug_io_data = q;
+ bdi_init(&q->backing_dev_info);

mutex_init(&q->sysfs_lock);

Index: linux-2.6/drivers/block/rd.c
===================================================================
--- linux-2.6.orig/drivers/block/rd.c 2007-06-07 15:38:55.000000000 +0200
+++ linux-2.6/drivers/block/rd.c 2007-06-07 15:39:34.000000000 +0200
@@ -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);
}

/*
@@ -421,6 +424,9 @@ static int __init rd_init(void)
int i;
int err = -ENOMEM;

+ bdi_init(&rd_backing_dev_info);
+ bdi_init(&rd_file_backing_dev_info);
+
if (rd_blocksize > PAGE_SIZE || rd_blocksize < 512 ||
(rd_blocksize & (rd_blocksize-1))) {
printk("RAMDISK: wrong blocksize %d, reverting to defaults\n",
Index: linux-2.6/drivers/char/mem.c
===================================================================
--- linux-2.6.orig/drivers/char/mem.c 2007-06-06 15:16:25.000000000 +0200
+++ linux-2.6/drivers/char/mem.c 2007-06-07 15:39:34.000000000 +0200
@@ -987,6 +987,8 @@ static int __init chr_dev_init(void)
MKDEV(MEM_MAJOR, devlist[i].minor),
devlist[i].name);

+ bdi_init(&zero_bdi);
+
return 0;
}

Index: linux-2.6/fs/char_dev.c
===================================================================
--- linux-2.6.orig/fs/char_dev.c 2007-06-06 15:16:25.000000000 +0200
+++ linux-2.6/fs/char_dev.c 2007-06-07 15:39:34.000000000 +0200
@@ -546,6 +546,7 @@ 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 2007-06-07 08:57:55.000000000 +0200
+++ linux-2.6/fs/fuse/inode.c 2007-06-07 15:39:34.000000000 +0200
@@ -433,6 +433,7 @@ 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;
+ bdi_init(&fc->bdi);
fc->reqctr = 0;
fc->blocked = 1;
get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));
@@ -446,6 +447,7 @@ 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 2007-06-07 08:57:55.000000000 +0200
+++ linux-2.6/fs/nfs/client.c 2007-06-07 15:39:34.000000000 +0200
@@ -658,6 +658,8 @@ 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;
+
+ bdi_init(&server->backing_dev_info);
server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;

if (server->wsize > max_rpc_payload)
@@ -787,6 +789,7 @@ 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 2007-06-07 15:39:25.000000000 +0200
+++ linux-2.6/include/linux/backing-dev.h 2007-06-07 16:11:19.000000000 +0200
@@ -34,6 +34,13 @@ struct backing_dev_info {
void *unplug_io_data;
};

+static inline void bdi_init(struct backing_dev_info *bdi)
+{
+}
+
+static inline void bdi_destroy(struct backing_dev_info *bdi)
+{
+}

/*
* Flags in backing_dev_info::capability
Index: linux-2.6/drivers/mtd/mtdcore.c
===================================================================
--- linux-2.6.orig/drivers/mtd/mtdcore.c 2007-06-06 15:16:25.000000000 +0200
+++ linux-2.6/drivers/mtd/mtdcore.c 2007-06-07 15:39:34.000000000 +0200
@@ -60,6 +60,7 @@ int add_mtd_device(struct mtd_info *mtd)
break;
}
}
+ bdi_init(mtd->backing_dev_info);

BUG_ON(mtd->writesize == 0);
mutex_lock(&mtd_table_mutex);
@@ -142,6 +143,10 @@ int del_mtd_device (struct mtd_info *mtd
}

mutex_unlock(&mtd_table_mutex);
+
+ if (mtd->backing_dev_info)
+ bdi_destroy(mtd->backing_dev_info);
+
return ret;
}

Index: linux-2.6/fs/hugetlbfs/inode.c
===================================================================
--- linux-2.6.orig/fs/hugetlbfs/inode.c 2007-06-07 15:38:56.000000000 +0200
+++ linux-2.6/fs/hugetlbfs/inode.c 2007-06-07 15:39:34.000000000 +0200
@@ -831,6 +831,8 @@ static int __init init_hugetlbfs_fs(void
out:
if (error)
kmem_cache_destroy(hugetlbfs_inode_cachep);
+ else
+ bdi_init(&hugetlbfs_backing_dev_info);
return error;
}

@@ -838,6 +840,7 @@ 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 2007-06-06 15:16:25.000000000 +0200
+++ linux-2.6/fs/ocfs2/dlm/dlmfs.c 2007-06-07 15:39:34.000000000 +0200
@@ -611,8 +611,10 @@ bail:
kmem_cache_destroy(dlmfs_inode_cache);
if (cleanup_worker)
destroy_workqueue(user_dlm_worker);
- } else
+ } else {
+ bdi_init(&dlmfs_backing_dev_info);
printk("OCFS2 User DLM kernel interface loaded\n");
+ }
return status;
}

@@ -624,6 +626,8 @@ 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 2007-06-06 15:16:25.000000000 +0200
+++ linux-2.6/fs/configfs/configfs_internal.h 2007-06-07 15:39:34.000000000 +0200
@@ -55,6 +55,8 @@ 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 void 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 2007-06-07 15:38:56.000000000 +0200
+++ linux-2.6/fs/configfs/inode.c 2007-06-07 15:39:34.000000000 +0200
@@ -256,4 +256,12 @@ void configfs_hash_and_remove(struct den
mutex_unlock(&dir->d_inode->i_mutex);
}

+void __init configfs_inode_init(void)
+{
+ 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 2007-06-06 15:16:25.000000000 +0200
+++ linux-2.6/fs/configfs/mount.c 2007-06-07 15:39:34.000000000 +0200
@@ -156,6 +156,7 @@ static int __init configfs_init(void)
configfs_dir_cachep = NULL;
}

+ configfs_inode_init();
out:
return err;
}
@@ -166,6 +167,7 @@ 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 2007-06-06 15:16:25.000000000 +0200
+++ linux-2.6/fs/ramfs/inode.c 2007-06-07 15:39:34.000000000 +0200
@@ -223,6 +223,7 @@ module_exit(exit_ramfs_fs)

int __init init_rootfs(void)
{
+ bdi_init(&ramfs_backing_dev_info);
return register_filesystem(&rootfs_fs_type);
}

Index: linux-2.6/fs/sysfs/inode.c
===================================================================
--- linux-2.6.orig/fs/sysfs/inode.c 2007-06-07 15:38:56.000000000 +0200
+++ linux-2.6/fs/sysfs/inode.c 2007-06-07 15:39:34.000000000 +0200
@@ -34,6 +34,11 @@ static const struct inode_operations sys
.setattr = sysfs_setattr,
};

+void __init sysfs_inode_init(void)
+{
+ bdi_init(&sysfs_backing_dev_info);
+}
+
void sysfs_delete_inode(struct inode *inode)
{
/* Free the shadowed directory inode operations */
Index: linux-2.6/fs/sysfs/mount.c
===================================================================
--- linux-2.6.orig/fs/sysfs/mount.c 2007-06-06 15:22:15.000000000 +0200
+++ linux-2.6/fs/sysfs/mount.c 2007-06-07 15:39:34.000000000 +0200
@@ -103,6 +103,8 @@ int __init sysfs_init(void)
} else
goto out_err;
out:
+ if (!err)
+ sysfs_inode_init();
return err;
out_err:
kmem_cache_destroy(sysfs_dir_cachep);
Index: linux-2.6/fs/sysfs/sysfs.h
===================================================================
--- linux-2.6.orig/fs/sysfs/sysfs.h 2007-06-06 15:22:15.000000000 +0200
+++ linux-2.6/fs/sysfs/sysfs.h 2007-06-07 15:39:43.000000000 +0200
@@ -57,6 +57,7 @@ extern void sysfs_delete_inode(struct in
extern void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode);
extern struct inode * sysfs_get_inode(struct sysfs_dirent *sd);
extern void sysfs_instantiate(struct dentry *dentry, struct inode *inode);
+extern void sysfs_inode_init(void);

extern void release_sysfs_dirent(struct sysfs_dirent * sd);
extern int sysfs_dirent_exist(struct sysfs_dirent *, const unsigned char *);
Index: linux-2.6/mm/shmem.c
===================================================================
--- linux-2.6.orig/mm/shmem.c 2007-06-07 15:38:59.000000000 +0200
+++ linux-2.6/mm/shmem.c 2007-06-07 15:39:34.000000000 +0200
@@ -2444,6 +2444,7 @@ static int __init init_tmpfs(void)
printk(KERN_ERR "Could not kern_mount tmpfs\n");
goto out1;
}
+ bdi_init(&shmem_backing_dev_info);
return 0;

out1:
Index: linux-2.6/mm/swap.c
===================================================================
--- linux-2.6.orig/mm/swap.c 2007-06-07 08:57:57.000000000 +0200
+++ linux-2.6/mm/swap.c 2007-06-07 15:39:34.000000000 +0200
@@ -550,6 +550,10 @@ 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 2007-06-07 15:38:59.000000000 +0200
+++ linux-2.6/mm/readahead.c 2007-06-07 15:39:34.000000000 +0200
@@ -242,6 +242,13 @@ unsigned long max_sane_readahead(unsigne
+ node_page_state(numa_node_id(), NR_FREE_PAGES)) / 2);
}

+static int __init readahead_init(void)
+{
+ bdi_init(&default_backing_dev_info);
+ return 0;
+}
+subsys_initcall(readahead_init);
+
/*
* Submit IO for the read-ahead request in file_ra_state.
*/

--

-
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