Re: [PATCH AUTOSEL 4.14 62/95] mm, memory_hotplug: initialize struct pages for the full memory section

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On Tue, 7 May 2019 13:02:08 -0400
Sasha Levin <sashal@xxxxxxxxxx> wrote:

> On Tue, May 07, 2019 at 09:50:50AM -0700, Linus Torvalds wrote:
> >On Tue, May 7, 2019 at 9:31 AM Alexander Duyck
> ><alexander.duyck@xxxxxxxxx> wrote:
> >>
> >> Wasn't this patch reverted in Linus's tree for causing a regression on
> >> some platforms? If so I'm not sure we should pull this in as a
> >> candidate for stable should we, or am I missing something?
> >
> >Good catch. It was reverted in commit 4aa9fc2a435a ("Revert "mm,
> >memory_hotplug: initialize struct pages for the full memory
> >section"").
> >
> >We ended up with efad4e475c31 ("mm, memory_hotplug:
> >is_mem_section_removable do not pass the end of a zone") instead (and
> >possibly others - this was just from looking for commit messages that
> >mentioned that reverted commit).
> 
> I got it wrong then. I'll fix it up and get efad4e475c31 in instead.

There were two commits replacing the reverted commit, fixing
is_mem_section_removable() and test_pages_in_a_zone() respectively:

commit 24feb47c5fa5 ("mm, memory_hotplug: test_pages_in_a_zone do not
pass the end of zone")
commit efad4e475c31 ("mm, memory_hotplug: is_mem_section_removable do
not pass the end of a zone")




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