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synced 2024-08-27 11:19:37 +00:00
Btrfs: kill max_extent mount option
As Yan pointed out, theres not much reason for all this complicated math to account for file extents being split up into max_extent chunks, since they are likely to all end up in the same leaf anyway. Since there isn't much reason to use max_extent, just remove the option altogether so we have one less thing we need to test. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
parent
1b1d1f6625
commit
287a0ab91d
6 changed files with 13 additions and 81 deletions
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@ -834,7 +834,6 @@ struct btrfs_fs_info {
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u64 last_trans_log_full_commit;
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u64 open_ioctl_trans;
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unsigned long mount_opt;
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u64 max_extent;
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u64 max_inline;
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u64 alloc_start;
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struct btrfs_transaction *running_transaction;
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@ -1634,7 +1634,6 @@ struct btrfs_root *open_ctree(struct super_block *sb,
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atomic_set(&fs_info->async_submit_draining, 0);
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atomic_set(&fs_info->nr_async_bios, 0);
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fs_info->sb = sb;
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fs_info->max_extent = (u64)-1;
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fs_info->max_inline = 8192 * 1024;
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fs_info->metadata_ratio = 0;
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@ -2846,7 +2846,7 @@ int btrfs_unreserve_metadata_for_delalloc(struct btrfs_root *root,
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}
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spin_unlock(&BTRFS_I(inode)->accounting_lock);
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BTRFS_I(inode)->reserved_extents--;
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BTRFS_I(inode)->reserved_extents -= num_items;
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BUG_ON(BTRFS_I(inode)->reserved_extents < 0);
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if (meta_sinfo->bytes_delalloc < num_bytes) {
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@ -3111,7 +3111,7 @@ int btrfs_reserve_metadata_for_delalloc(struct btrfs_root *root,
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return -ENOSPC;
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}
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BTRFS_I(inode)->reserved_extents++;
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BTRFS_I(inode)->reserved_extents += num_items;
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check_force_delalloc(meta_sinfo);
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spin_unlock(&meta_sinfo->lock);
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@ -796,7 +796,7 @@ static noinline int cow_file_range(struct inode *inode,
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while (disk_num_bytes > 0) {
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unsigned long op;
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cur_alloc_size = min(disk_num_bytes, root->fs_info->max_extent);
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cur_alloc_size = disk_num_bytes;
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ret = btrfs_reserve_extent(trans, root, cur_alloc_size,
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root->sectorsize, 0, alloc_hint,
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(u64)-1, &ins, 1);
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@ -1227,30 +1227,9 @@ static int run_delalloc_range(struct inode *inode, struct page *locked_page,
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static int btrfs_split_extent_hook(struct inode *inode,
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struct extent_state *orig, u64 split)
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{
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struct btrfs_root *root = BTRFS_I(inode)->root;
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u64 size;
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if (!(orig->state & EXTENT_DELALLOC))
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return 0;
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size = orig->end - orig->start + 1;
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if (size > root->fs_info->max_extent) {
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u64 num_extents;
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u64 new_size;
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new_size = orig->end - split + 1;
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num_extents = div64_u64(size + root->fs_info->max_extent - 1,
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root->fs_info->max_extent);
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/*
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* if we break a large extent up then leave oustanding_extents
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* be, since we've already accounted for the large extent.
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*/
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if (div64_u64(new_size + root->fs_info->max_extent - 1,
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root->fs_info->max_extent) < num_extents)
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return 0;
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}
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spin_lock(&BTRFS_I(inode)->accounting_lock);
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BTRFS_I(inode)->outstanding_extents++;
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spin_unlock(&BTRFS_I(inode)->accounting_lock);
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@ -1268,38 +1247,10 @@ static int btrfs_merge_extent_hook(struct inode *inode,
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struct extent_state *new,
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struct extent_state *other)
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{
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struct btrfs_root *root = BTRFS_I(inode)->root;
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u64 new_size, old_size;
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u64 num_extents;
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/* not delalloc, ignore it */
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if (!(other->state & EXTENT_DELALLOC))
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return 0;
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old_size = other->end - other->start + 1;
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if (new->start < other->start)
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new_size = other->end - new->start + 1;
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else
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new_size = new->end - other->start + 1;
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/* we're not bigger than the max, unreserve the space and go */
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if (new_size <= root->fs_info->max_extent) {
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spin_lock(&BTRFS_I(inode)->accounting_lock);
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BTRFS_I(inode)->outstanding_extents--;
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spin_unlock(&BTRFS_I(inode)->accounting_lock);
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return 0;
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}
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/*
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* If we grew by another max_extent, just return, we want to keep that
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* reserved amount.
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*/
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num_extents = div64_u64(old_size + root->fs_info->max_extent - 1,
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root->fs_info->max_extent);
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if (div64_u64(new_size + root->fs_info->max_extent - 1,
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root->fs_info->max_extent) > num_extents)
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return 0;
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spin_lock(&BTRFS_I(inode)->accounting_lock);
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BTRFS_I(inode)->outstanding_extents--;
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spin_unlock(&BTRFS_I(inode)->accounting_lock);
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@ -1328,6 +1279,7 @@ static int btrfs_set_bit_hook(struct inode *inode, u64 start, u64 end,
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BTRFS_I(inode)->outstanding_extents++;
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spin_unlock(&BTRFS_I(inode)->accounting_lock);
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btrfs_delalloc_reserve_space(root, inode, end - start + 1);
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spin_lock(&root->fs_info->delalloc_lock);
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BTRFS_I(inode)->delalloc_bytes += end - start + 1;
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root->fs_info->delalloc_bytes += end - start + 1;
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@ -1356,6 +1308,7 @@ static int btrfs_clear_bit_hook(struct inode *inode,
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if (bits & EXTENT_DO_ACCOUNTING) {
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spin_lock(&BTRFS_I(inode)->accounting_lock);
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WARN_ON(!BTRFS_I(inode)->outstanding_extents);
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BTRFS_I(inode)->outstanding_extents--;
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spin_unlock(&BTRFS_I(inode)->accounting_lock);
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btrfs_unreserve_metadata_for_delalloc(root, inode, 1);
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@ -5384,7 +5337,6 @@ void btrfs_destroy_inode(struct inode *inode)
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void btrfs_drop_inode(struct inode *inode)
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{
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struct btrfs_root *root = BTRFS_I(inode)->root;
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if (inode->i_nlink > 0 && btrfs_root_refs(&root->root_item) == 0)
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generic_delete_inode(inode);
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else
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@ -5788,18 +5740,15 @@ static int prealloc_file_range(struct inode *inode, u64 start, u64 end,
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struct btrfs_trans_handle *trans;
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struct btrfs_root *root = BTRFS_I(inode)->root;
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struct btrfs_key ins;
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u64 alloc_size;
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u64 cur_offset = start;
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u64 num_bytes = end - start;
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int ret = 0;
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u64 i_size;
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while (num_bytes > 0) {
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alloc_size = min(num_bytes, root->fs_info->max_extent);
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trans = btrfs_start_transaction(root, 1);
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ret = btrfs_reserve_extent(trans, root, alloc_size,
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ret = btrfs_reserve_extent(trans, root, num_bytes,
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root->sectorsize, 0, alloc_hint,
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(u64)-1, &ins, 1);
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if (ret) {
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@ -303,6 +303,7 @@ static int __btrfs_remove_ordered_extent(struct inode *inode,
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struct btrfs_ordered_extent *entry)
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{
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struct btrfs_ordered_inode_tree *tree;
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struct btrfs_root *root = BTRFS_I(inode)->root;
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struct rb_node *node;
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tree = &BTRFS_I(inode)->ordered_tree;
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@ -312,12 +313,13 @@ static int __btrfs_remove_ordered_extent(struct inode *inode,
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set_bit(BTRFS_ORDERED_COMPLETE, &entry->flags);
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spin_lock(&BTRFS_I(inode)->accounting_lock);
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WARN_ON(!BTRFS_I(inode)->outstanding_extents);
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BTRFS_I(inode)->outstanding_extents--;
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spin_unlock(&BTRFS_I(inode)->accounting_lock);
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btrfs_unreserve_metadata_for_delalloc(BTRFS_I(inode)->root,
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inode, 1);
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spin_lock(&BTRFS_I(inode)->root->fs_info->ordered_extent_lock);
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spin_lock(&root->fs_info->ordered_extent_lock);
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list_del_init(&entry->root_extent_list);
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/*
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@ -329,7 +331,7 @@ static int __btrfs_remove_ordered_extent(struct inode *inode,
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!mapping_tagged(inode->i_mapping, PAGECACHE_TAG_DIRTY)) {
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list_del_init(&BTRFS_I(inode)->ordered_operations);
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}
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spin_unlock(&BTRFS_I(inode)->root->fs_info->ordered_extent_lock);
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spin_unlock(&root->fs_info->ordered_extent_lock);
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return 0;
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}
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@ -64,10 +64,9 @@ static void btrfs_put_super(struct super_block *sb)
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enum {
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Opt_degraded, Opt_subvol, Opt_subvolid, Opt_device, Opt_nodatasum,
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Opt_nodatacow, Opt_max_extent, Opt_max_inline, Opt_alloc_start,
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Opt_nobarrier, Opt_ssd, Opt_nossd, Opt_ssd_spread, Opt_thread_pool,
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Opt_noacl, Opt_compress, Opt_compress_force, Opt_notreelog, Opt_ratio,
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Opt_flushoncommit,
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Opt_nodatacow, Opt_max_inline, Opt_alloc_start, Opt_nobarrier, Opt_ssd,
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Opt_nossd, Opt_ssd_spread, Opt_thread_pool, Opt_noacl, Opt_compress,
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Opt_compress_force, Opt_notreelog, Opt_ratio, Opt_flushoncommit,
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Opt_discard, Opt_err,
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};
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@ -79,7 +78,6 @@ static match_table_t tokens = {
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{Opt_nodatasum, "nodatasum"},
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{Opt_nodatacow, "nodatacow"},
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{Opt_nobarrier, "nobarrier"},
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{Opt_max_extent, "max_extent=%s"},
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{Opt_max_inline, "max_inline=%s"},
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{Opt_alloc_start, "alloc_start=%s"},
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{Opt_thread_pool, "thread_pool=%d"},
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@ -188,18 +186,6 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
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info->thread_pool_size);
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}
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break;
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case Opt_max_extent:
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num = match_strdup(&args[0]);
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if (num) {
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info->max_extent = memparse(num, NULL);
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kfree(num);
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info->max_extent = max_t(u64,
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info->max_extent, root->sectorsize);
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printk(KERN_INFO "btrfs: max_extent at %llu\n",
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(unsigned long long)info->max_extent);
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}
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break;
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case Opt_max_inline:
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num = match_strdup(&args[0]);
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if (num) {
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@ -529,9 +515,6 @@ static int btrfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
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seq_puts(seq, ",nodatacow");
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if (btrfs_test_opt(root, NOBARRIER))
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seq_puts(seq, ",nobarrier");
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if (info->max_extent != (u64)-1)
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seq_printf(seq, ",max_extent=%llu",
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(unsigned long long)info->max_extent);
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if (info->max_inline != 8192 * 1024)
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seq_printf(seq, ",max_inline=%llu",
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(unsigned long long)info->max_inline);
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