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-rw-r--r--fs/btrfs/extent-tree.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 7e20a65..01220b7 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3786,7 +3786,7 @@ static void update_global_block_rsv(struct btrfs_fs_info *fs_info)
spin_lock(&block_rsv->lock);
spin_lock(&sinfo->lock);
- block_rsv->size = num_bytes;
+ block_rsv->size = min_t(u64, num_bytes, 512 * 1024 * 1024);
num_bytes = sinfo->bytes_used + sinfo->bytes_pinned +
sinfo->bytes_reserved + sinfo->bytes_readonly +