We can not do flushable reservation for the relocation when we create snapshot, because it may make the transaction commit task and the flush task wait for each other and the deadlock happens.
Signed-off-by: Miao Xie <[email protected]> --- fs/btrfs/transaction.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index e3d2970..00d5510 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -881,8 +881,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, btrfs_reloc_pre_snapshot(trans, pending, &to_reserve); if (to_reserve > 0) { - ret = btrfs_block_rsv_add(root, &pending->block_rsv, - to_reserve); + ret = btrfs_block_rsv_add_noflush(root, &pending->block_rsv, + to_reserve); if (ret) { pending->error = ret; goto fail; -- 1.7.6.4 -- 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
