linux-kernel - Re: cleanup the walk_page

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Message-ID: <20190827013408.GC31766@mellanox.com>
Date:   Tue, 27 Aug 2019 01:34:13 +0000
From:   Jason Gunthorpe <jgg@...lanox.com>
To:     Christoph Hellwig <hch@...radead.org>
CC:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Christoph Hellwig <hch@....de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Hellström <thomas@...pmail.org>,
        Jerome Glisse <jglisse@...hat.com>,
        Steven Price <steven.price@....com>,
        Linux-MM <linux-mm@...ck.org>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>
Subject: Re: cleanup the walk_page_range interface

On Sat, Aug 24, 2019 at 03:26:55PM -0700, Christoph Hellwig wrote:
> On Fri, Aug 23, 2019 at 01:43:12PM +0000, Jason Gunthorpe wrote:
> > > So what is the plan forward?  Probably a little late for 5.3,
> > > so queue it up in -mm for 5.4 and deal with the conflicts in at least
> > > hmm?  Queue it up in the hmm tree even if it doesn't 100% fit?
> > 
> > Did we make a decision on this? Due to travel & LPC I'd like to
> > finalize the hmm tree next week.
> 
> I don't think we've made any decision.  I'd still love to see this
> in hmm.git.  It has a minor conflict, but I can resend a rebased
> version.

I'm looking at this.. The hmm conflict is easy enough to fix.

But the compile conflict with these two patches in -mm requires some
action from Andrew:

commit 027b9b8fd9ee3be6b7440462102ec03a2d593213
Author: Minchan Kim <minchan@...nel.org>
Date:   Sun Aug 25 11:49:27 2019 +1000

    mm: introduce MADV_PAGEOUT

commit f227453a14cadd4727dd159782531d617f257001
Author: Minchan Kim <minchan@...nel.org>
Date:   Sun Aug 25 11:49:27 2019 +1000

    mm: introduce MADV_COLD
    
    Patch series "Introduce MADV_COLD and MADV_PAGEOUT", v7.

I'm inclined to suggest you send this series in the 2nd half of the
merge window after this MADV stuff lands for least disruption? 

Thanks,
Jason