linux-kernel - Re: [PATCH RFC 02/10] xfs: Refactor xfs_reflink_end_cow

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Message-ID: <d049cabb-9535-4a1d-ab01-61512c041af8@oracle.com>
Date: Thu, 6 Feb 2025 10:35:28 +0000
From: John Garry <john.g.garry@...cle.com>
To: "Darrick J. Wong" <djwong@...nel.org>
Cc: brauner@...nel.org, cem@...nel.org, dchinner@...hat.com, hch@....de,
        linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, ojaswin@...ux.ibm.com,
        ritesh.list@...il.com, martin.petersen@...cle.com
Subject: Re: [PATCH RFC 02/10] xfs: Refactor xfs_reflink_end_cow_extent()

On 05/02/2025 19:50, Darrick J. Wong wrote:
>> diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c
>> index 59f7fc16eb80..580469668334 100644
>> --- a/fs/xfs/xfs_reflink.c
>> +++ b/fs/xfs/xfs_reflink.c
>> @@ -786,35 +786,20 @@ xfs_reflink_update_quota(
>>    * requirements as low as possible.
>>    */
>>   STATIC int
>> -xfs_reflink_end_cow_extent(
>> +xfs_reflink_end_cow_extent_locked(
>>   	struct xfs_inode	*ip,
>>   	xfs_fileoff_t		*offset_fsb,
>> -	xfs_fileoff_t		end_fsb)
>> +	xfs_fileoff_t		end_fsb,
>> +	struct xfs_trans	*tp,
>> +	bool			*commit)
> Transactions usually come before the inode in the parameter list.

ok

> 
> You don't need to pass out a @commit flag -- if the function returns
> nonzero then the caller has to cancel the transaction; otherwise it will
> return zero and the caller should commit it.>  There's no penalty for
> committing a non-dirty transaction.

If there is no penalty, then fine. But I don't feel totally comfortable 
with this and would prefer to keep the same behavior.

Thanks,
John