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Date: Tue, 21 Jul 2020 17:06:15 +0200 From: Christoph Hellwig <hch@....de> To: Matthew Wilcox <willy@...radead.org> Cc: Christoph Hellwig <hch@....de>, Goldwyn Rodrigues <rgoldwyn@...e.de>, Dave Chinner <david@...morbit.com>, Damien Le Moal <damien.lemoal@....com>, Naohiro Aota <naohiro.aota@....com>, Johannes Thumshirn <jth@...nel.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 On Tue, Jul 21, 2020 at 04:04:32PM +0100, Matthew Wilcox wrote: > On Tue, Jul 21, 2020 at 04:53:13PM +0200, Christoph Hellwig wrote: > > 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? > > I thought you were going to respin this with EREMCHG changed to ENOTBLK? Oh, true. I'll do that ASAP.
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