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From: Eric Sandeen <sandeen@redhat.com>
To: "Darrick J. Wong" <darrick.wong@oracle.com>,
	Christoph Hellwig <hch@infradead.org>
Cc: linux-xfs@vger.kernel.org, Amir Goldstein <amir73il@gmail.com>
Subject: Re: [PATCH 14/18] xfs: refactor quota exceeded test
Date: Wed, 1 Jul 2020 13:48:58 -0500
Message-ID: <113694f7-5695-e245-5531-e8534d44a476@redhat.com> (raw)
In-Reply-To: <20200701175134.GU7606@magnolia>

On 7/1/20 12:51 PM, Darrick J. Wong wrote:
> On Wed, Jul 01, 2020 at 09:56:21AM +0100, Christoph Hellwig wrote:
>> On Tue, Jun 30, 2020 at 08:43:20AM -0700, Darrick J. Wong wrote:
>>> From: Darrick J. Wong <darrick.wong@oracle.com>
>>>
>>> Refactor the open-coded test for whether or not we're over quota.
>>>
>>> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
>>> ---
>>>  fs/xfs/xfs_dquot.c |   95 ++++++++++++++++------------------------------------
>>>  1 file changed, 30 insertions(+), 65 deletions(-)
>>>
>>>
>>> diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
>>> index 35a113d1b42b..ef34c82c28a0 100644
>>> --- a/fs/xfs/xfs_dquot.c
>>> +++ b/fs/xfs/xfs_dquot.c
>>> @@ -97,6 +97,33 @@ xfs_qm_adjust_dqlimits(
>>>  		xfs_dquot_set_prealloc_limits(dq);
>>>  }
>>>  
>>> +/*
>>> + * Determine if this quota counter is over either limit and set the quota
>>> + * timers as appropriate.
>>> + */
>>> +static inline void
>>> +xfs_qm_adjust_res_timer(
>>> +	struct xfs_dquot_res	*res,
>>> +	struct xfs_def_qres	*dres)
>>> +{
>>> +	bool			over;
>>> +
>>> +#ifdef DEBUG
>>> +	if (res->hardlimit)
>>> +		ASSERT(res->softlimit <= res->hardlimit);
>>> +#endif
>>
>> Maybe:
>> 	ASSERRT(!res->hardlimit || res->softlimit <= res->hardlimit);
> 
> Changed.
> 
>>
>>> +
>>> +	over = (res->softlimit && res->count > res->softlimit) ||
>>> +	       (res->hardlimit && res->count > res->hardlimit);
>>> +
>>> +	if (over && res->timer == 0)
>>> +		res->timer = ktime_get_real_seconds() + dres->timelimit;
>>> +	else if (!over && res->timer != 0)
>>> +		res->timer = 0;
>>> +	else if (!over && res->timer == 0)
>>> +		res->warnings = 0;
>>
>> What about:
>>
>> 	if ((res->softlimit && res->count > res->softlimit) ||
>> 	    (res->hardlimit && res->count > res->hardlimit)) {
>> 		if (res->timer == 0)	
>> 			res->timer = ktime_get_real_seconds() + dres->timelimit;
>> 	} else {
>> 		if (res->timer)
>> 			res->timer = 0;
>> 		else
>> 			res->warnings = 0;
>> 	}
> 
> I don't care either way, but the last time I sent this patch out, Eric
> and Amir seemed to want a flatter if structure:
> 
> https://lore.kernel.org/linux-xfs/b979d33d-361b-88cd-699c-7e5f1c621698@sandeen.net/
> https://lore.kernel.org/linux-xfs/CAOQ4uxiveTQu8_7UOvN07=P4o9hBBZTCyu4sSw5UpbrNPQL2pQ@mail.gmail.com/
> 
> Granted that was before I pulled the whole thing into a separate helper
> function, so maybe the context is different here...?

I think it is different.  I'm not too hung up about either way and
can't promise to dedicate time to thinking about it soon, so -
as you wish.  :)

-Eric


  reply index

Thread overview: 94+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-30 15:41 [PATCH 00/18] xfs: remove xfs_disk_quot from incore dquot Darrick J. Wong
2020-06-30 15:41 ` [PATCH 01/18] xfs: clear XFS_DQ_FREEING if we can't lock the dquot buffer to flush Darrick J. Wong
2020-06-30 21:35   ` Allison Collins
2020-07-01  8:32   ` Chandan Babu R
2020-07-01  8:33   ` Christoph Hellwig
2020-07-01 22:42     ` Dave Chinner
2020-06-30 15:42 ` [PATCH 02/18] xfs: fix inode quota reservation checks Darrick J. Wong
2020-06-30 21:35   ` Allison Collins
2020-07-01  8:33   ` Chandan Babu R
2020-07-01  8:34   ` Christoph Hellwig
2020-06-30 15:42 ` [PATCH 03/18] xfs: validate ondisk/incore dquot flags Darrick J. Wong
2020-06-30 21:35   ` Allison Collins
2020-07-01  8:33   ` Chandan Babu R
2020-07-01  8:42   ` Christoph Hellwig
2020-07-01 18:25     ` Darrick J. Wong
2020-07-02  6:30       ` Christoph Hellwig
2020-07-02 15:13         ` Darrick J. Wong
2020-07-01 22:41   ` Dave Chinner
2020-07-01 23:16     ` Darrick J. Wong
2020-06-30 15:42 ` [PATCH 04/18] xfs: stop using q_core.d_flags in the quota code Darrick J. Wong
2020-07-01  8:34   ` Chandan Babu R
2020-07-01  8:47   ` Christoph Hellwig
2020-07-01 19:02     ` Darrick J. Wong
2020-07-01 20:15   ` Allison Collins
2020-07-01 22:50   ` Dave Chinner
2020-07-01 23:19     ` Darrick J. Wong
2020-07-01 23:44       ` Dave Chinner
2020-07-01 23:50         ` Darrick J. Wong
2020-07-03  0:58           ` Dave Chinner
2020-07-03 18:01             ` Darrick J. Wong
2020-06-30 15:42 ` [PATCH 05/18] xfs: stop using q_core.d_id " Darrick J. Wong
2020-07-01  8:33   ` Chandan Babu R
2020-07-01  8:48   ` Christoph Hellwig
2020-07-01 20:16   ` Allison Collins
2020-06-30 15:42 ` [PATCH 06/18] xfs: use a per-resource struct for incore dquot data Darrick J. Wong
2020-07-01  8:33   ` Chandan Babu R
2020-07-01  8:49   ` Christoph Hellwig
2020-07-01 20:16   ` Allison Collins
2020-06-30 15:42 ` [PATCH 07/18] xfs: stop using q_core limits in the quota code Darrick J. Wong
2020-07-01  8:33   ` Chandan Babu R
2020-07-01  8:50   ` Christoph Hellwig
2020-07-01 20:16   ` Allison Collins
2020-07-01 23:01   ` Dave Chinner
2020-07-01 23:13     ` Darrick J. Wong
2020-07-01 23:33       ` Darrick J. Wong
2020-07-01 23:45         ` Dave Chinner
2020-06-30 15:42 ` [PATCH 08/18] xfs: stop using q_core counters " Darrick J. Wong
2020-07-01  8:33   ` Chandan Babu R
2020-07-01  8:51   ` Christoph Hellwig
2020-07-01 23:20   ` Allison Collins
2020-06-30 15:42 ` [PATCH 09/18] xfs: stop using q_core warning " Darrick J. Wong
2020-07-01  8:33   ` Chandan Babu R
2020-07-01  8:51   ` Christoph Hellwig
2020-07-01 23:20   ` Allison Collins
2020-06-30 15:42 ` [PATCH 10/18] xfs: stop using q_core timers " Darrick J. Wong
2020-07-01  8:34   ` Chandan Babu R
2020-07-01  8:51   ` Christoph Hellwig
2020-07-01 23:20   ` Allison Collins
2020-06-30 15:43 ` [PATCH 11/18] xfs: remove qcore from incore dquots Darrick J. Wong
2020-07-01  8:34   ` Chandan Babu R
2020-07-01  8:52   ` Christoph Hellwig
2020-07-01 23:07   ` Dave Chinner
2020-07-01 23:14     ` Darrick J. Wong
2020-07-02  2:06   ` Allison Collins
2020-06-30 15:43 ` [PATCH 12/18] xfs: refactor default quota limits by resource Darrick J. Wong
2020-07-01  8:52   ` Chandan Babu R
2020-07-01  8:53   ` Christoph Hellwig
2020-07-01 23:30   ` Dave Chinner
2020-07-02  0:07     ` Darrick J. Wong
2020-07-02  2:06   ` Allison Collins
2020-06-30 15:43 ` [PATCH 13/18] xfs: remove unnecessary arguments from quota adjust functions Darrick J. Wong
2020-07-01  8:53   ` Christoph Hellwig
2020-07-01  8:58   ` Chandan Babu R
2020-07-02  2:06   ` Allison Collins
2020-06-30 15:43 ` [PATCH 14/18] xfs: refactor quota exceeded test Darrick J. Wong
2020-07-01  8:56   ` Christoph Hellwig
2020-07-01 17:51     ` Darrick J. Wong
2020-07-01 18:48       ` Eric Sandeen [this message]
2020-07-01 23:34       ` Dave Chinner
2020-07-01 10:19   ` Chandan Babu R
2020-07-02 18:57   ` Allison Collins
2020-06-30 15:43 ` [PATCH 15/18] xfs: refactor xfs_qm_scall_setqlim Darrick J. Wong
2020-07-01  8:56   ` Christoph Hellwig
2020-07-03  4:11   ` Allison Collins
2020-07-03 12:39   ` Chandan Babu R
2020-06-30 15:43 ` [PATCH 16/18] xfs: refactor xfs_trans_dqresv Darrick J. Wong
2020-07-03  4:11   ` Allison Collins
2020-07-03 13:00   ` Chandan Babu R
2020-06-30 15:43 ` [PATCH 17/18] xfs: refactor xfs_trans_apply_dquot_deltas Darrick J. Wong
2020-07-04 20:41   ` Allison Collins
2020-07-06 13:40   ` Chandan Babu R
2020-06-30 15:43 ` [PATCH 18/18] xfs: add more dquot tracepoints Darrick J. Wong
2020-07-04 20:41   ` Allison Collins
2020-07-06 13:42   ` Chandan Babu R

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