On Thu, Feb 02, 2017 at 06:34:06PM +0100, Jan Kara wrote: > Allocate struct backing_dev_info separately instead of embedding it > inside superblock. This unifies handling of bdi among users.
Looks good. Reviewed-by: Liu Bo <[email protected]> Thanks, -liubo > > CC: Chris Mason <[email protected]> > CC: Josef Bacik <[email protected]> > CC: David Sterba <[email protected]> > CC: [email protected] > Signed-off-by: Jan Kara <[email protected]> > --- > fs/btrfs/ctree.h | 1 - > fs/btrfs/disk-io.c | 36 +++++++----------------------------- > fs/btrfs/super.c | 7 +++++++ > 3 files changed, 14 insertions(+), 30 deletions(-) > > diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h > index 6a823719b6c5..1dc06f66dfcf 100644 > --- a/fs/btrfs/ctree.h > +++ b/fs/btrfs/ctree.h > @@ -801,7 +801,6 @@ struct btrfs_fs_info { > struct btrfs_super_block *super_for_commit; > struct super_block *sb; > struct inode *btree_inode; > - struct backing_dev_info bdi; > struct mutex tree_log_mutex; > struct mutex transaction_kthread_mutex; > struct mutex cleaner_mutex; > diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c > index 37a31b12bb0c..b25723e729c0 100644 > --- a/fs/btrfs/disk-io.c > +++ b/fs/btrfs/disk-io.c > @@ -1810,21 +1810,6 @@ static int btrfs_congested_fn(void *congested_data, > int bdi_bits) > return ret; > } > > -static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info > *bdi) > -{ > - int err; > - > - err = bdi_setup_and_register(bdi, "btrfs"); > - if (err) > - return err; > - > - bdi->ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_SIZE; > - bdi->congested_fn = btrfs_congested_fn; > - bdi->congested_data = info; > - bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK; > - return 0; > -} > - > /* > * called by the kthread helper functions to finally call the bio end_io > * functions. This is where read checksum verification actually happens > @@ -2598,16 +2583,10 @@ int open_ctree(struct super_block *sb, > goto fail; > } > > - ret = setup_bdi(fs_info, &fs_info->bdi); > - if (ret) { > - err = ret; > - goto fail_srcu; > - } > - > ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, > GFP_KERNEL); > if (ret) { > err = ret; > - goto fail_bdi; > + goto fail_srcu; > } > fs_info->dirty_metadata_batch = PAGE_SIZE * > (1 + ilog2(nr_cpu_ids)); > @@ -2715,7 +2694,6 @@ int open_ctree(struct super_block *sb, > > sb->s_blocksize = 4096; > sb->s_blocksize_bits = blksize_bits(4096); > - sb->s_bdi = &fs_info->bdi; > > btrfs_init_btree_inode(fs_info); > > @@ -2912,9 +2890,12 @@ int open_ctree(struct super_block *sb, > goto fail_sb_buffer; > } > > - fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); > - fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, > - SZ_4M / PAGE_SIZE); > + 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_MAX_READAHEAD * 1024 / PAGE_SIZE; > + 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); > > sb->s_blocksize = sectorsize; > sb->s_blocksize_bits = blksize_bits(sectorsize); > @@ -3282,8 +3263,6 @@ int open_ctree(struct super_block *sb, > percpu_counter_destroy(&fs_info->delalloc_bytes); > fail_dirty_metadata_bytes: > percpu_counter_destroy(&fs_info->dirty_metadata_bytes); > -fail_bdi: > - bdi_destroy(&fs_info->bdi); > fail_srcu: > cleanup_srcu_struct(&fs_info->subvol_srcu); > fail: > @@ -4010,7 +3989,6 @@ void close_ctree(struct btrfs_fs_info *fs_info) > percpu_counter_destroy(&fs_info->dirty_metadata_bytes); > percpu_counter_destroy(&fs_info->delalloc_bytes); > percpu_counter_destroy(&fs_info->bio_counter); > - bdi_destroy(&fs_info->bdi); > cleanup_srcu_struct(&fs_info->subvol_srcu); > > btrfs_free_stripe_hash_table(fs_info); > diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c > index b5ae7d3d1896..08ef08b63132 100644 > --- a/fs/btrfs/super.c > +++ b/fs/btrfs/super.c > @@ -1133,6 +1133,13 @@ static int btrfs_fill_super(struct super_block *sb, > #endif > sb->s_flags |= MS_I_VERSION; > sb->s_iflags |= SB_I_CGROUPWB; > + > + err = super_setup_bdi(sb); > + if (err) { > + btrfs_err(fs_info, "super_setup_bdi failed"); > + return err; > + } > + > err = open_ctree(sb, fs_devices, (char *)data); > if (err) { > btrfs_err(fs_info, "open_ctree failed"); > -- > 2.10.2 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html
