From: Oscar Salvador <osalvador.vilardaga@gmail.com>
To: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Cc: Michal Hocko <mhocko@kernel.org>,
Dan Williams <dan.j.williams@intel.com>,
Linux Memory Management List <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
linux-nvdimm@lists.01.org,
Pavel Tatashin <pavel.tatashin@microsoft.com>,
dave.hansen@intel.com, Jerome Glisse <jglisse@redhat.com>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
mingo@kernel.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
yi.z.zhang@linux.intel.com
Subject: Re: [PATCH v5 4/4] mm: Defer ZONE_DEVICE page initialization to the point where we init pgmap
Date: Tue, 30 Oct 2018 09:05:27 +0100 [thread overview]
Message-ID: <CAOXBz7h-yiFCPoK5tNm6qSAGm8n83fSwHYU42x5DjtSbL84zQg@mail.gmail.com> (raw)
In-Reply-To: <3281f3044fa231bbc1b02d5c5efca3502a0d05a8.camel@linux.intel.com>
> Yes, the hotplug lock was part of the original issue. However that
> starts to drift into the area I believe Oscar was working on as a part
> of his patch set in encapsulating the move_pfn_range_to_zone and other
> calls that were contained in the hotplug lock into their own functions.
While reworking it for my patchset, I thought that we can move
move_pfn_range_to_zone
out of hotplug lock.
But then I __think__ we would have to move init_currently_empty_zone() within
the span lock as zone->zone_start_pfn is being touched there.
At least that is what the zone locking rules say about it.
Since I saw that Dan was still reworking his patchset about unify HMM/devm code,
I just took one step back and I went simpler [1].
The main reason for backing off was I felt a bit demotivated due to
the lack of feedback,
and I did not want to interfer either with your work or Dan's work.
Plus I also was unsure about some other things like whether it is ok calling
kasan_add_zero_shadow/kasan_remove_zero_shadow out of the lock.
So I decided to make less changes in regard of HMM/devm.
Unfortunately, I did not get a lot of feedback there yet.
Just some reviews from David and a confirmation that fixes one of the
issues Jonathan reported [2].
>
> I was hoping to wait until after Dan's HMM patches and Oscar's changes
> had been sorted before I get into any further refactor of this specific
> code.
I plan to ping the series, but I wanted to give more time to people
since we are in the merge window now.
[1] https://patchwork.kernel.org/cover/10642049/
[2] https://patchwork.kernel.org/patch/10642057/#22275173
next prev parent reply other threads:[~2018-10-30 8:05 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-25 20:18 [PATCH v5 0/4] Address issues slowing persistent memory initialization Alexander Duyck
2018-09-25 20:19 ` [PATCH v5 1/4] mm: Remove now defunct NO_BOOTMEM from depends list for deferred init Alexander Duyck
2018-09-25 21:05 ` Mike Rapoport
2018-09-25 20:20 ` [PATCH v5 2/4] mm: Provide kernel parameter to allow disabling page init poisoning Alexander Duyck
2018-09-25 20:26 ` Dave Hansen
2018-09-25 20:38 ` Alexander Duyck
2018-09-25 22:14 ` Dave Hansen
2018-09-25 22:27 ` Alexander Duyck
2018-09-26 7:38 ` Michal Hocko
2018-09-26 15:24 ` Alexander Duyck
2018-09-26 15:39 ` Michal Hocko
2018-09-26 15:41 ` Dave Hansen
2018-09-26 16:18 ` Alexander Duyck
2018-09-26 15:36 ` Dave Hansen
2018-09-26 22:36 ` Andrew Morton
2018-09-25 20:20 ` [PATCH v5 3/4] mm: Create non-atomic version of SetPageReserved for init use Alexander Duyck
2018-09-25 20:21 ` [PATCH v5 4/4] mm: Defer ZONE_DEVICE page initialization to the point where we init pgmap Alexander Duyck
2018-09-26 7:55 ` Michal Hocko
2018-09-26 18:25 ` Alexander Duyck
2018-09-26 18:52 ` Dan Williams
2018-09-27 11:20 ` Michal Hocko
2018-09-27 11:09 ` Michal Hocko
2018-09-27 12:25 ` Oscar Salvador
2018-09-27 13:13 ` Michal Hocko
2018-09-27 14:50 ` Oscar Salvador
2018-09-27 15:41 ` David Hildenbrand
2018-09-28 8:12 ` Oscar Salvador
2018-09-28 8:44 ` Oscar Salvador
2018-09-28 15:50 ` Dan Williams
2018-09-27 12:32 ` Oscar Salvador
2018-10-08 21:01 ` Dan Williams
2018-10-08 21:38 ` Alexander Duyck
2018-10-08 22:00 ` Dan Williams
2018-10-08 22:07 ` Alexander Duyck
2018-10-08 22:36 ` Alexander Duyck
2018-10-08 22:59 ` Dan Williams
2018-10-08 23:34 ` [mm PATCH] memremap: Fix reference count for pgmap in devm_memremap_pages Alexander Duyck
2018-10-09 0:20 ` Dan Williams
2018-10-09 17:00 ` [PATCH v5 4/4] mm: Defer ZONE_DEVICE page initialization to the point where we init pgmap Yi Zhang
2018-10-09 18:04 ` Dan Williams
2018-10-09 20:26 ` Alexander Duyck
2018-10-09 21:19 ` Dan Williams
2018-10-10 12:52 ` Yi Zhang
2018-10-10 15:27 ` Alexander Duyck
2018-10-11 8:17 ` Yi Zhang
2018-10-10 9:58 ` Michal Hocko
2018-10-10 16:39 ` Alexander Duyck
2018-10-10 17:24 ` Michal Hocko
2018-10-10 17:39 ` Alexander Duyck
2018-10-10 17:53 ` Michal Hocko
2018-10-10 18:13 ` Alexander Duyck
2018-10-10 18:52 ` Michal Hocko
2018-10-11 8:55 ` Michal Hocko
2018-10-11 17:38 ` Alexander Duyck
2018-10-11 18:22 ` Dan Williams
2018-10-17 7:52 ` Michal Hocko
2018-10-17 15:02 ` Alexander Duyck
2018-10-29 14:12 ` Michal Hocko
2018-10-29 15:59 ` Alexander Duyck
2018-10-29 16:35 ` Michal Hocko
2018-10-29 17:01 ` Alexander Duyck
2018-10-29 17:24 ` Michal Hocko
2018-10-29 17:34 ` Dan Williams
2018-10-29 17:45 ` Michal Hocko
2018-10-29 17:42 ` Alexander Duyck
2018-10-29 18:18 ` Michal Hocko
2018-10-29 19:59 ` Alexander Duyck
2018-10-30 6:29 ` Michal Hocko
2018-10-30 6:55 ` Dan Williams
2018-10-30 8:17 ` Michal Hocko
2018-10-30 15:57 ` Dan Williams
2018-10-30 8:05 ` Oscar Salvador [this message]
2018-10-29 15:49 ` Dan Williams
2018-10-29 15:56 ` Michal Hocko
2018-10-10 18:18 ` Dan Williams
2018-10-11 8:39 ` Yi Zhang
2018-10-11 15:38 ` Alexander Duyck
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