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Date:   Tue, 21 Jul 2020 16:53:13 +0200
From:   Christoph Hellwig <>
To:     Goldwyn Rodrigues <>
Cc:     Christoph Hellwig <>, Dave Chinner <>,
        Damien Le Moal <>,
        Naohiro Aota <>,
        Johannes Thumshirn <>,
        Matthew Wilcox <>,,,,,
Subject: Re: RFC: iomap write invalidation

On Mon, Jul 20, 2020 at 04:51:25PM -0500, Goldwyn Rodrigues wrote:
> 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.

No idea.  Darrick, are you ok with picking this up soon so that
Goldwyn can pull it in?

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