linux-ext4 - Re: [RFC 0/7] ext4: Allocator changes for atomic write support with DIO

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Date: Tue, 12 Dec 2023 16:10:52 +0000
From: John Garry <john.g.garry@...cle.com>
To: Christoph Hellwig <hch@...radead.org>
Cc: Ojaswin Mujoo <ojaswin@...ux.ibm.com>, linux-ext4@...r.kernel.org,
        Theodore Ts'o <tytso@....edu>, Ritesh Harjani <ritesh.list@...il.com>,
        linux-kernel@...r.kernel.org, "Darrick J . Wong" <djwong@...nel.org>,
        linux-block@...r.kernel.org, linux-xfs@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, dchinner@...hat.com
Subject: Re: [RFC 0/7] ext4: Allocator changes for atomic write support with
 DIO

On 12/12/2023 13:10, Christoph Hellwig wrote:
> On Tue, Dec 12, 2023 at 07:46:51AM +0000, John Garry wrote:
>> It is assumed that the user will fallocate/dd the complete file before
>> issuing atomic writes, and we will have extent alignment and length as
>> required.
> I don't think that's a long time maintainable usage model.

ok, sure - as I may have mentioned, this was even causing issues in porting.

I sent the v2 series without XFS support, but the same API proposal as 
before. Let's discuss any potential API changes there.

Thanks,
John