linux-kernel - Re: pte_present check on hugetlb

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Date:	Fri, 6 Jun 2014 13:19:44 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Dave Hansen <dave.hansen@...el.com>
Cc:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	jwboyer@...oraproject.org, Sasha Levin <sasha.levin@...cle.com>,
	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: pte_present check on hugetlb_entry fix for 3.15?

On Fri, 06 Jun 2014 13:11:00 -0700 Dave Hansen <dave.hansen@...el.com> wrote:

> On 06/06/2014 11:59 AM, Andrew Morton wrote:
> > On Fri,  6 Jun 2014 14:46:37 -0400 Naoya Horiguchi <n-horiguchi@...jp.nec.com> wrote:
> >> On Fri, Jun 06, 2014 at 01:36:54PM -0400, Josh Boyer wrote:
> >>> Hi Naoya,
> >>>
> >>> I noticed that your
> >>> mm-add-pte_present-check-on-existing-hugetlb_entry-callbacks.patch in
> >>> Andrew's -mm tree has been queued for a while and has a CC to stable on
> >>> it.  Is that something that should get into 3.15?
> >>
> >> I'm not sure. I guess Andrew will decide this in a few days.
> > 
> > I was planning on doing so but then Dave popped up with an alternative
> > which rather blew a hole in things.
> 
> This one patch is independent from what I was posting.  I don't think my
> patch would have had any effect on the behavior this one is fixing.
> 
> IOW, don't hold it up for my (or my patches) benefit.

I was referring to these, which remain in limbo:

mm-hugetlbfs-fix-rmapping-for-anonymous-hugepages-with-page_pgoff.patch
mm-hugetlbfs-fix-rmapping-for-anonymous-hugepages-with-page_pgoff-v2.patch
mm-hugetlbfs-fix-rmapping-for-anonymous-hugepages-with-page_pgoff-v3.patch
mm-hugetlbfs-fix-rmapping-for-anonymous-hugepages-with-page_pgoff-v3-fix.patch
pagewalk-update-page-table-walker-core.patch
pagewalk-update-page-table-walker-core-fix-end-address-calculation-in-walk_page_range.patch
pagewalk-update-page-table-walker-core-fix-end-address-calculation-in-walk_page_range-fix.patch
pagewalk-update-page-table-walker-core-fix.patch
pagewalk-add-walk_page_vma.patch
smaps-redefine-callback-functions-for-page-table-walker.patch
clear_refs-redefine-callback-functions-for-page-table-walker.patch
pagemap-redefine-callback-functions-for-page-table-walker.patch
pagemap-redefine-callback-functions-for-page-table-walker-fix.patch
numa_maps-redefine-callback-functions-for-page-table-walker.patch
memcg-redefine-callback-functions-for-page-table-walker.patch
arch-powerpc-mm-subpage-protc-use-walk_page_vma-instead-of-walk_page_range.patch
pagewalk-remove-argument-hmask-from-hugetlb_entry.patch
pagewalk-remove-argument-hmask-from-hugetlb_entry-fix.patch
pagewalk-remove-argument-hmask-from-hugetlb_entry-fix-fix.patch
mempolicy-apply-page-table-walker-on-queue_pages_range.patch
mm-add-pte_present-check-on-existing-hugetlb_entry-callbacks.patch
mm-pagewalkc-move-pte-null-check.patch
mm-prom-pid-clear_refs-avoid-split_huge_page.patch

Some energy in driving all this toward some sort of conclusion would be
appreciated.
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