linux-kernel - Re: [PATCH V2 0/8] btrfs: convert kmaps to core page calls

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Date:   Thu, 11 Feb 2021 13:32:35 -0800
From:   Ira Weiny <ira.weiny@...el.com>
To:     dsterba@...e.cz, Andrew Morton <akpm@...ux-foundation.org>,
        clm@...com, josef@...icpanda.com,
        Christoph Hellwig <hch@...radead.org>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH V2 0/8] btrfs: convert kmaps to core page calls

On Thu, Feb 11, 2021 at 08:38:03PM +0100, David Sterba wrote:
> On Tue, Feb 09, 2021 at 10:22:13PM -0800, ira.weiny@...el.com wrote:
> > From: Ira Weiny <ira.weiny@...el.com>
> > 
> > Per the conversation on V1 it looks like Andrew would like this to go through
> > the btrfs tree.  I think that is fine.  The other users of
> > memcpy_[to|from]_page are probably not ready and I believe could be taken in an
> > early rc after David submits.
> > 
> > Is that ok with you David?
> 
> Yes.
> 
> The branch is now in
> https://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git/log/?h=kmap-conversion
> let me know if I've missed acked-by or reviewed-by, I added those sent
> to the mailinglist and added mine to the btrfs ones and to the iov_iter
> patch.

Looks good.  Thank you!

> 
> I'll add the patchset to my for-next so it gets picked by linux-next and
> will keep testing it for at least a week.
> 
> Though this is less than the expected time before merge window, the
> reasoning is that it's exporting helpers that are going to be used in
> various subsystems. The changes in btrfs are simple and would allow to
> focus on the other less trivial conversions. ETA for the pull request is
> mid of the 2nd week of the merge window or after rc1.

Thanks for working with me on this.  Yes these were the more straight forward
conversions.  The next set will require more review and I should have them
posted soon at least for RFC.  Unfortunately, there are 2 places which are
proving difficult to follow the mapping orders required of kmap_local_page().
I'll open that discussion with the next round of conversions.

For now, thank you again,
Ira