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Btrfs: remove no longer used function to run delayed refs asynchronously

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It used to be called from only two places (truncate path and releasing a
transaction handle), but commits 28bad21257 ("btrfs: fix truncate
throttling") and db2462a6ad ("btrfs: don't run delayed refs in the end
transaction logic") removed their calls to this function, so it's not used
anymore. Just remove it and all its helpers.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana 2019-04-17 10:28:47 +01:00 committed by David Sterba
parent e3de9b159a
commit 32b593bfcb
2 changed files with 0 additions and 87 deletions
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2
fs/btrfs/ctree.h
View File

@ -2701,8 +2701,6 @@ void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
unsigned long count);
int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
unsigned long count, u64 transid, int wait);
void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
struct btrfs_delayed_ref_root *delayed_refs,
struct btrfs_delayed_ref_head *head);

85
fs/btrfs/extent-tree.c
View File

@ -2876,91 +2876,6 @@ int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans)
return btrfs_check_space_for_delayed_refs(trans->fs_info);
}
struct async_delayed_refs {
struct btrfs_root *root;
u64 transid;
int count;
int error;
int sync;
struct completion wait;
struct btrfs_work work;
};
static inline struct async_delayed_refs *
to_async_delayed_refs(struct btrfs_work *work)
{
return container_of(work, struct async_delayed_refs, work);
}
static void delayed_ref_async_start(struct btrfs_work *work)
{
struct async_delayed_refs *async = to_async_delayed_refs(work);
struct btrfs_trans_handle *trans;
struct btrfs_fs_info *fs_info = async->root->fs_info;
int ret;
/* if the commit is already started, we don't need to wait here */
if (btrfs_transaction_blocked(fs_info))
goto done;
trans = btrfs_join_transaction(async->root);
if (IS_ERR(trans)) {
async->error = PTR_ERR(trans);
goto done;
}
/* Don't bother flushing if we got into a different transaction */
if (trans->transid > async->transid)
goto end;
ret = btrfs_run_delayed_refs(trans, async->count);
if (ret)
async->error = ret;
end:
ret = btrfs_end_transaction(trans);
if (ret && !async->error)
async->error = ret;
done:
if (async->sync)
complete(&async->wait);
else
kfree(async);
}
int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
unsigned long count, u64 transid, int wait)
{
struct async_delayed_refs *async;
int ret;
async = kmalloc(sizeof(*async), GFP_NOFS);
if (!async)
return -ENOMEM;
async->root = fs_info->tree_root;
async->count = count;
async->error = 0;
async->transid = transid;
if (wait)
async->sync = 1;
else
async->sync = 0;
init_completion(&async->wait);
btrfs_init_work(&async->work, btrfs_extent_refs_helper,
delayed_ref_async_start, NULL, NULL);
btrfs_queue_work(fs_info->extent_workers, &async->work);
if (wait) {
wait_for_completion(&async->wait);
ret = async->error;
kfree(async);
return ret;
}
return 0;
}
/*
* this starts processing the delayed reference count updates and
* extent insertions we have queued up so far. count can be