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Btrfs: remove unnecessary lock in may_commit_transaction()
The reason is: - The per-cpu counter has its own lock to protect itself. - Here we needn't get a exact value. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
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b88935bf98
commit
0424c54897
1 changed files with 1 additions and 8 deletions
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@ -4112,13 +4112,9 @@ static int may_commit_transaction(struct btrfs_root *root,
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goto commit;
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/* See if there is enough pinned space to make this reservation */
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spin_lock(&space_info->lock);
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if (percpu_counter_compare(&space_info->total_bytes_pinned,
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bytes) >= 0) {
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spin_unlock(&space_info->lock);
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bytes) >= 0)
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goto commit;
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}
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spin_unlock(&space_info->lock);
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/*
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* See if there is some space in the delayed insertion reservation for
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@ -4127,16 +4123,13 @@ static int may_commit_transaction(struct btrfs_root *root,
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if (space_info != delayed_rsv->space_info)
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return -ENOSPC;
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spin_lock(&space_info->lock);
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spin_lock(&delayed_rsv->lock);
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if (percpu_counter_compare(&space_info->total_bytes_pinned,
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bytes - delayed_rsv->size) >= 0) {
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spin_unlock(&delayed_rsv->lock);
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spin_unlock(&space_info->lock);
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return -ENOSPC;
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}
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spin_unlock(&delayed_rsv->lock);
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spin_unlock(&space_info->lock);
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commit:
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trans = btrfs_join_transaction(root);
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