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Date:   Mon, 20 Jul 2020 16:51:25 -0500
From:   Goldwyn Rodrigues <>
To:     Christoph Hellwig <>
Cc:     Dave Chinner <>,
        Damien Le Moal <>,
        Naohiro Aota <>,
        Johannes Thumshirn <>,
        Matthew Wilcox <>,,,,,
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.


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