linux-ext4 - Re: RFC: iomap write invalidation

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Date:   Mon, 20 Jul 2020 16:51:25 -0500
From:   Goldwyn Rodrigues <rgoldwyn@...e.de>
To:     Christoph Hellwig <hch@....de>
Cc:     Dave Chinner <david@...morbit.com>,
        Damien Le Moal <damien.lemoal@....com>,
        Naohiro Aota <naohiro.aota@....com>,
        Johannes Thumshirn <jth@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        linux-btrfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        cluster-devel@...hat.com, linux-ext4@...r.kernel.org,
        linux-xfs@...r.kernel.org
Subject: Re: RFC: iomap write invalidation

Hi Christoph,

On  9:46 13/07, Christoph Hellwig wrote:
> Hi all,
> 
> this series has two parts:  the first one picks up Dave's patch to avoid
> invalidation entierly for reads, picked up deep down from the btrfs iomap
> thread.  The second one falls back to buffered writes if invalidation fails
> instead of leaving a stale cache around.  Let me know what you think about
> this approch.

Which kernel version are these changes expected?
btrfs dio switch to iomap depends on this.

-- 
Goldwyn