writeback: add name to backing_dev_info
Jens Axboe [Fri, 12 Jun 2009 12:45:52 +0000 (14:45 +0200)]
This enables us to track who does what and print info. Its main use
is catching dirty inodes on the default_backing_dev_info, so we can
fix that up.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

17 files changed:
block/blk-core.c
drivers/block/aoe/aoeblk.c
drivers/char/mem.c
fs/btrfs/disk-io.c
fs/char_dev.c
fs/configfs/inode.c
fs/fuse/inode.c
fs/hugetlbfs/inode.c
fs/nfs/client.c
fs/ocfs2/dlm/dlmfs.c
fs/ramfs/inode.c
fs/sysfs/inode.c
fs/ubifs/super.c
include/linux/backing-dev.h
kernel/cgroup.c
mm/backing-dev.c
mm/swap_state.c

index e3299a7..e695634 100644 (file)
@@ -501,6 +501,7 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
                        (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
        q->backing_dev_info.state = 0;
        q->backing_dev_info.capabilities = BDI_CAP_MAP_COPY;
+       q->backing_dev_info.name = "block";
 
        err = bdi_init(&q->backing_dev_info);
        if (err) {
index 1e15889..95d3449 100644 (file)
@@ -268,6 +268,7 @@ aoeblk_gdalloc(void *vp)
        if (!d->blkq)
                goto err_mempool;
        blk_queue_make_request(d->blkq, aoeblk_make_request);
+       d->blkq->backing_dev_info.name = "aoe";
        if (bdi_init(&d->blkq->backing_dev_info))
                goto err_blkq;
        spin_lock_irqsave(&d->lock, flags);
index afa8813..645237b 100644 (file)
@@ -822,6 +822,7 @@ static const struct file_operations zero_fops = {
  * - permits private mappings, "copies" are taken of the source of zeros
  */
 static struct backing_dev_info zero_bdi = {
+       .name           = "char/mem",
        .capabilities   = BDI_CAP_MAP_COPY,
 };
 
index e83be2e..15831d5 100644 (file)
@@ -1352,6 +1352,7 @@ static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi)
 {
        int err;
 
+       bdi->name = "btrfs";
        bdi->capabilities = BDI_CAP_MAP_COPY;
        err = bdi_init(bdi);
        if (err)
index a173551..7c27a8e 100644 (file)
@@ -31,6 +31,7 @@
  * - no readahead or I/O queue unplugging required
  */
 struct backing_dev_info directly_mappable_cdev_bdi = {
+       .name = "char",
        .capabilities   = (
 #ifdef CONFIG_MMU
                /* permit private copies of the data to be taken */
index 4921e74..a2f7460 100644 (file)
@@ -51,6 +51,7 @@ static const struct address_space_operations configfs_aops = {
 };
 
 static struct backing_dev_info configfs_backing_dev_info = {
+       .name           = "configfs",
        .ra_pages       = 0,    /* No readahead */
        .capabilities   = BDI_CAP_NO_ACCT_AND_WRITEBACK,
 };
index f91ccc4..4567db6 100644 (file)
@@ -801,6 +801,7 @@ static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb)
 {
        int err;
 
+       fc->bdi.name = "fuse";
        fc->bdi.ra_pages = (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
        fc->bdi.unplug_io_fn = default_unplug_io_fn;
        /* fuse does it's own writeback accounting */
index cb88dac..a93b885 100644 (file)
@@ -44,6 +44,7 @@ static const struct inode_operations hugetlbfs_dir_inode_operations;
 static const struct inode_operations hugetlbfs_inode_operations;
 
 static struct backing_dev_info hugetlbfs_backing_dev_info = {
+       .name           = "hugetlbfs",
        .ra_pages       = 0,    /* No readahead */
        .capabilities   = BDI_CAP_NO_ACCT_AND_WRITEBACK,
 };
index 8d25ccb..c6be84a 100644 (file)
@@ -879,6 +879,7 @@ static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *
                server->rsize = NFS_MAX_FILE_IO_SIZE;
        server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
 
+       server->backing_dev_info.name = "nfs";
        server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
 
        if (server->wsize > max_rpc_payload)
index 1c9efb4..02bf178 100644 (file)
@@ -325,6 +325,7 @@ clear_fields:
 }
 
 static struct backing_dev_info dlmfs_backing_dev_info = {
+       .name           = "ocfs2-dlmfs",
        .ra_pages       = 0,    /* No readahead */
        .capabilities   = BDI_CAP_NO_ACCT_AND_WRITEBACK,
 };
index 0ff7566..a7f0110 100644 (file)
@@ -46,6 +46,7 @@ static const struct super_operations ramfs_ops;
 static const struct inode_operations ramfs_dir_inode_operations;
 
 static struct backing_dev_info ramfs_backing_dev_info = {
+       .name           = "ramfs",
        .ra_pages       = 0,    /* No readahead */
        .capabilities   = BDI_CAP_NO_ACCT_AND_WRITEBACK |
                          BDI_CAP_MAP_DIRECT | BDI_CAP_MAP_COPY |
index 555f0ff..e57f98e 100644 (file)
@@ -29,6 +29,7 @@ static const struct address_space_operations sysfs_aops = {
 };
 
 static struct backing_dev_info sysfs_backing_dev_info = {
+       .name           = "sysfs",
        .ra_pages       = 0,    /* No readahead */
        .capabilities   = BDI_CAP_NO_ACCT_AND_WRITEBACK,
 };
index 8d6050a..51763aa 100644 (file)
@@ -1965,6 +1965,7 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
         *
         * Read-ahead will be disabled because @c->bdi.ra_pages is 0.
         */
+       c->bdi.name = "ubifs",
        c->bdi.capabilities = BDI_CAP_MAP_COPY;
        c->bdi.unplug_io_fn = default_unplug_io_fn;
        err  = bdi_init(&c->bdi);
index d045f5f..2f218b7 100644 (file)
@@ -66,6 +66,8 @@ struct backing_dev_info {
        void (*unplug_io_fn)(struct backing_dev_info *, struct page *);
        void *unplug_io_data;
 
+       char *name;
+
        struct percpu_counter bdi_stat[NR_BDI_STAT_ITEMS];
 
        struct prop_local_percpu completions;
index b6eadfe..c7ece8f 100644 (file)
@@ -600,6 +600,7 @@ static struct inode_operations cgroup_dir_inode_operations;
 static struct file_operations proc_cgroupstats_operations;
 
 static struct backing_dev_info cgroup_backing_dev_info = {
+       .name           = "cgroup",
        .capabilities   = BDI_CAP_NO_ACCT_AND_WRITEBACK,
 };
 
index 22c45e9..5cb32c5 100644 (file)
@@ -17,6 +17,7 @@ void default_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
 EXPORT_SYMBOL(default_unplug_io_fn);
 
 struct backing_dev_info default_backing_dev_info = {
+       .name           = "default",
        .ra_pages       = VM_MAX_READAHEAD * 1024 / PAGE_CACHE_SIZE,
        .state          = 0,
        .capabilities   = BDI_CAP_MAP_COPY,
index 42cd38e..5ae6b8b 100644 (file)
@@ -34,6 +34,7 @@ static const struct address_space_operations swap_aops = {
 };
 
 static struct backing_dev_info swap_backing_dev_info = {
+       .name           = "swap",
        .capabilities   = BDI_CAP_NO_ACCT_AND_WRITEBACK | BDI_CAP_SWAP_BACKED,
        .unplug_io_fn   = swap_unplug_io_fn,
 };