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BACKPORT: bdi: initialize ->ra_pages and ->io_pages in bdi_init

Browse source 
Set up a readahead size by default, as very few users have a good
reason to change it.  This means code, ecryptfs, and orangefs now
set up the values while they were previously missing it, while ubifs,
mtd and vboxsf manually set it to 0 to avoid readahead.

Change-Id: I2394fea47e8685f26aee9cc52c72018cd2715741
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: David Sterba <dsterba@suse.com> [btrfs]
Acked-by: Richard Weinberger <richard@nod.at> [ubifs, mtd]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-09-24 08:51:32 +02:00 • committed by Alexander Martinz
commit 699354537f
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GPG key ID: CF15BDD9A321A9B2
8 changed files with 10 additions and 7 deletions
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2
block/blk-core.c
View file

@ -504,8 +504,6 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
if (!q->stats)
goto fail_stats;
q->backing_dev_info->ra_pages = VM_READAHEAD_PAGES;
q->backing_dev_info->io_pages = VM_READAHEAD_PAGES;
q->backing_dev_info->capabilities = BDI_CAP_CGROUP_WRITEBACK;
q->backing_dev_info->name = "block";
q->node = node_id;

2
drivers/mtd/mtdcore.c
View file

@ -1948,6 +1948,8 @@ static struct backing_dev_info * __init mtd_bdi_init(char *name)
bdi = bdi_alloc(GFP_KERNEL);
if (!bdi)
return ERR_PTR(-ENOMEM);
bdi->ra_pages = 0;
bdi->io_pages = 0;
bdi->name = name;
/*

6
fs/9p/vfs_super.c
View file

@ -80,8 +80,10 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses,
if (ret)
return ret;
if (v9ses->cache)
sb->s_bdi->ra_pages = VM_READAHEAD_PAGES;
if (!v9ses->cache) {
sb->s_bdi->ra_pages = 0;
sb->s_bdi->io_pages = 0;
}
sb->s_flags |= SB_ACTIVE | SB_DIRSYNC;
if (!v9ses->cache)

1
fs/afs/super.c
View file

@ -449,7 +449,6 @@ static int afs_fill_super(struct super_block *sb, struct afs_fs_context *ctx)
ret = super_setup_bdi(sb);
if (ret)
return ret;
sb->s_bdi->ra_pages = VM_READAHEAD_PAGES;
/* allocate the root inode and dentry */
if (as->dyn_root) {

1
fs/btrfs/disk-io.c
View file

@ -3008,7 +3008,6 @@ int open_ctree(struct super_block *sb,
sb->s_bdi->congested_fn = btrfs_congested_fn;
sb->s_bdi->congested_data = fs_info;
sb->s_bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK;
sb->s_bdi->ra_pages = VM_READAHEAD_PAGES;
sb->s_bdi->ra_pages *= btrfs_super_num_devices(disk_super);
sb->s_bdi->ra_pages = max(sb->s_bdi->ra_pages, SZ_4M / PAGE_SIZE);

1
fs/fuse/inode.c
View file

@ -1164,7 +1164,6 @@ static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb)
if (err)
return err;
sb->s_bdi->ra_pages = VM_READAHEAD_PAGES;
/* fuse does it's own writeback accounting */
sb->s_bdi->capabilities = BDI_CAP_NO_ACCT_WB | BDI_CAP_STRICTLIMIT;

2
fs/ubifs/super.c
View file

@ -2189,6 +2189,8 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
c->vi.vol_id);
if (err)
goto out_close;
sb->s_bdi->ra_pages = 0;
sb->s_bdi->io_pages = 0;
sb->s_fs_info = c;
sb->s_magic = UBIFS_SUPER_MAGIC;

2
mm/backing-dev.c
View file

@ -878,6 +878,8 @@ struct backing_dev_info *bdi_alloc_node(gfp_t gfp_mask, int node_id)
kfree(bdi);
return NULL;
}
bdi->ra_pages = VM_READAHEAD_PAGES;
bdi->io_pages = VM_READAHEAD_PAGES;
return bdi;
}
EXPORT_SYMBOL(bdi_alloc_node);