Re: [PATCH 0/6] block atomic writes for XFS

[John Garry <john.g.garry@oracle.com>]

On 09/02/2024 07:14, Ojaswin Mujoo wrote:
> On Wed, Jan 24, 2024 at 02:26:39PM +0000, John Garry wrote:
>> This series expands atomic write support to filesystems, specifically
>> XFS. Since XFS rtvol supports extent alignment already, support will
>> initially be added there. When XFS forcealign feature is merged, then we
>> can similarly support atomic writes for a non-rtvol filesystem.
> 
> Hi John,
> 
> Along with rtvol check, we can also have a simple check to see if the
> FS blocksize itself is big enough to satisfy the atomic requirements.
> For eg on machines with 64K page, we can have say 16k or 64k block sizes
> which should be able to provide required allocation behavior for atomic
> writes. In such cases we don't need rtvol.
>
I suppose we could do, but I would rather just concentrate on rtvol 
support initially, and there we do report atomic write unit min = FS 
block size (even if rt extsize is unset).

In addition, I plan to initially just support atomic write unit min = FS 
block size (for both rtvol and !rtvol).

Thanks,
John