• Q
    btrfs: qgroup: Commit transaction in advance to reduce early EDQUOT · a514d638
    Qu Wenruo 提交于
    Unlike previous method that tries to commit transaction inside
    qgroup_reserve(), this time we will try to commit transaction using
    fs_info->transaction_kthread to avoid nested transaction and no need to
    worry about locking context.
    
    Since it's an asynchronous function call and we won't wait for
    transaction commit, unlike previous method, we must call it before we
    hit the qgroup limit.
    
    So this patch will use the ratio and size of qgroup meta_pertrans
    reservation as indicator to check if we should trigger a transaction
    commit.  (meta_prealloc won't be cleaned in transaction committ, it's
    useless anyway)
    Signed-off-by: NQu Wenruo <wqu@suse.com>
    Signed-off-by: NDavid Sterba <dsterba@suse.com>
    a514d638
qgroup.c 83.1 KB