[Ocfs2-devel] [PATCH] ocfs2/dlm: fix misuse of list_move_tail() in dlm_run_purge_list()

[Xue jiufei <xuejiufei@huawei.com>]

On 2014/6/14 5:16, Mark Fasheh wrote:
> On Fri, Jun 13, 2014 at 03:26:29PM +0800, Xue jiufei wrote:
>> When a lockres in purge list but is still in use, it should be moved to
>> the tail of purge list. dlm_thread will continue to check next lockres
>> in purge list. However, code list_move_tail(&dlm->purge_list,
>> &lockres->purge) will do *no* movements, so dlm_thread will purge the
>> same lockres in this loop again and again. If it is in use for a long
>> time, other lockres will not be processed.
>>
>> Signed-off-by: Yiwen Jiang <jiangyiwen@huawei.com>
>> Signed-off-by: joyce.xue <xuejiufei@huawei.com>
>> ---
>>  fs/ocfs2/dlm/dlmthread.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/fs/ocfs2/dlm/dlmthread.c b/fs/ocfs2/dlm/dlmthread.c
>> index 9db869d..ce017de 100644
>> --- a/fs/ocfs2/dlm/dlmthread.c
>> +++ b/fs/ocfs2/dlm/dlmthread.c
>> @@ -264,7 +264,7 @@ static void dlm_run_purge_list(struct dlm_ctxt *dlm,
>>  			     "used %d, state %d\n", dlm->name,
>>  			     lockres->lockname.len, lockres->lockname.name,
>>  			     !unused, lockres->state);
>> -			list_move_tail(&dlm->purge_list, &lockres->purge);
>> +			list_move_tail(&lockres->purge, dlm->purge_list);
> 
> Erf, good catch!
> 
> But this wants to be:
> 
> list_move_tail(&lockres->purge, &dlm->purge_list);
>                                ^^^^
>                     Notice the extra '&'
> 
> correct?
> 	--Mark
> 
Yes, my mistake. I have already sent the version two. 
Would you please review it? thank you.
> --
> Mark Fasheh
>