linux-kernel - Re: [PATCH v3 15/15] nvme: Ensure atomic writes will be executed atomically

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Date: Tue, 13 Feb 2024 14:07:57 +0000
From: John Garry <john.g.garry@...cle.com>
To: Christoph Hellwig <hch@....de>
Cc: axboe@...nel.dk, kbusch@...nel.org, sagi@...mberg.me, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, djwong@...nel.org, viro@...iv.linux.org.uk,
        brauner@...nel.org, dchinner@...hat.com, jack@...e.cz,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-nvme@...ts.infradead.org, linux-xfs@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, tytso@....edu, jbongio@...gle.com,
        linux-scsi@...r.kernel.org, ming.lei@...hat.com, ojaswin@...ux.ibm.com,
        bvanassche@....org, Alan Adamson <alan.adamson@...cle.com>
Subject: Re: [PATCH v3 15/15] nvme: Ensure atomic writes will be executed
 atomically

On 13/02/2024 06:42, Christoph Hellwig wrote:
> If we don't end up doing the checks in the block layer:
> 
>> +	/*
>> +	 * Ensure that nothing has been sent which cannot be executed
>> +	 * atomically.
>> +	 */
>> +	if (req->cmd_flags & REQ_ATOMIC) {
>> +		struct nvme_ns_head *head = ns->head;
>> +		u32 boundary_bytes = head->atomic_boundary;
> 
> ... please split the checks into a helper. 

ok

> And merge them into the
> previous patch.

Fine, if you prefer that.

>