From: Jason Gunthorpe <jgg-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
To: Dan Williams <dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: "linux-nvdimm-hn68Rpc1hR1g9hUCZPvPmw@public.gmane.org"
<linux-nvdimm-hn68Rpc1hR1g9hUCZPvPmw@public.gmane.org>,
"nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org"
<nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org"
<dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>,
"linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org"
<linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org>,
Ben Skeggs <bskeggs-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
"linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
Subject: Re: [PATCH 16/25] device-dax: use the dev_pagemap internal refcount
Date: Fri, 28 Jun 2019 18:29:29 +0000 [thread overview]
Message-ID: <20190628182922.GA15242@mellanox.com> (raw)
In-Reply-To: <CAPcyv4iWTe=vOXUqkr_CguFrFRqgA7hJSt4J0B3RpuP-Okz0Vw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Fri, Jun 28, 2019 at 10:10:12AM -0700, Dan Williams wrote:
> On Fri, Jun 28, 2019 at 10:08 AM Dan Williams <dan.j.williams@intel.com> wrote:
> >
> > On Fri, Jun 28, 2019 at 10:02 AM Jason Gunthorpe <jgg@mellanox.com> wrote:
> > >
> > > On Fri, Jun 28, 2019 at 09:27:44AM -0700, Dan Williams wrote:
> > > > On Fri, Jun 28, 2019 at 8:39 AM Jason Gunthorpe <jgg@mellanox.com> wrote:
> > > > >
> > > > > On Wed, Jun 26, 2019 at 02:27:15PM +0200, Christoph Hellwig wrote:
> > > > > > The functionality is identical to the one currently open coded in
> > > > > > device-dax.
> > > > > >
> > > > > > Signed-off-by: Christoph Hellwig <hch@lst.de>
> > > > > > Reviewed-by: Ira Weiny <ira.weiny@intel.com>
> > > > > > drivers/dax/dax-private.h | 4 ----
> > > > > > drivers/dax/device.c | 43 ---------------------------------------
> > > > > > 2 files changed, 47 deletions(-)
> > > > >
> > > > > DanW: I think this series has reached enough review, did you want
> > > > > to ack/test any further?
> > > > >
> > > > > This needs to land in hmm.git soon to make the merge window.
> > > >
> > > > I was awaiting a decision about resolving the collision with Ira's
> > > > patch before testing the final result again [1]. You can go ahead and
> > > > add my reviewed-by for the series, but my tested-by should be on the
> > > > final state of the series.
> > >
> > > The conflict looks OK to me, I think we can let Andrew and Linus
> > > resolve it.
> >
> > Andrew's tree effectively always rebases since it's a quilt series.
> > I'd recommend pulling Ira's patch out of -mm and applying it with the
> > rest of hmm reworks. Any other git tree I'd agree with just doing the
> > late conflict resolution, but I'm not clear on what's the best
> > practice when conflicting with -mm.
What happens depends on timing as things arrive to Linus. I promised
to send hmm.git early, so I understand that Andrew will quilt rebase
his tree to Linus's and fix the conflict in Ira's patch before he
sends it.
> Regardless the patch is buggy. If you want to do the conflict
> resolution it should be because the DEVICE_PUBLIC removal effectively
> does the same fix otherwise we're knowingly leaving a broken point in
> the history.
I'm not sure I understand your concern, is there something wrong with
CH's series as it stands? hmm is a non-rebasing git tree, so as long
as the series is correct *when I apply it* there is no broken history.
I assumed the conflict resolution for Ira's patch was to simply take
the deletion of the if block from CH's series - right?
If we do need to take Ira's patch into hmm.git it will go after CH's
series (and Ira will have to rebase/repost it), so I think there is
nothing to do at this moment - unless you are saying there is a
problem with the series in CH's git tree?
Regards,
Jason
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next prev parent reply other threads:[~2019-06-28 18:29 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-26 12:26 dev_pagemap related cleanups v3 Christoph Hellwig
2019-06-26 12:27 ` [PATCH 01/25] mm: remove the unused ARCH_HAS_HMM_DEVICE Kconfig option Christoph Hellwig
2019-06-26 12:27 ` [PATCH 03/25] mm: remove hmm_devmem_add_resource Christoph Hellwig
2019-06-27 16:18 ` Jason Gunthorpe
[not found] ` <20190627161813.GB9499-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2019-06-27 16:54 ` Christoph Hellwig
2019-06-26 12:27 ` [PATCH 09/25] memremap: move dev_pagemap callbacks into a separate structure Christoph Hellwig
[not found] ` <20190626122724.13313-1-hch-jcswGhMUV9g@public.gmane.org>
2019-06-26 12:27 ` [PATCH 02/25] mm: remove the struct hmm_device infrastructure Christoph Hellwig
2019-06-26 12:27 ` [PATCH 04/25] mm: remove MEMORY_DEVICE_PUBLIC support Christoph Hellwig
2019-06-26 16:00 ` Dan Williams
[not found] ` <CAPcyv4gTOf+EWzSGrFrh2GrTZt5HVR=e+xicUKEpiy57px8J+w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-06-26 17:14 ` Ira Weiny
[not found] ` <20190626171445.GA4605-J5EW/p2F9lUlb2qzJQmr9q2pdiUAq4bhAL8bYrjMMd8@public.gmane.org>
2019-06-26 18:49 ` Ira Weiny
2019-06-26 12:27 ` [PATCH 05/25] mm: don't clear ->mapping in hmm_devmem_free Christoph Hellwig
2019-06-26 12:27 ` [PATCH 06/25] mm: export alloc_pages_vma Christoph Hellwig
2019-06-26 12:36 ` Michal Hocko
2019-06-26 12:27 ` [PATCH 07/25] mm: factor out a devm_request_free_mem_region helper Christoph Hellwig
2019-06-26 12:27 ` [PATCH 08/25] memremap: validate the pagemap type passed to devm_memremap_pages Christoph Hellwig
[not found] ` <20190626122724.13313-9-hch-jcswGhMUV9g@public.gmane.org>
2019-06-26 18:01 ` Ira Weiny
2019-06-26 12:27 ` [PATCH 10/25] memremap: pass a struct dev_pagemap to ->kill and ->cleanup Christoph Hellwig
2019-06-26 12:27 ` [PATCH 11/25] memremap: lift the devmap_enable manipulation into devm_memremap_pages Christoph Hellwig
[not found] ` <20190626122724.13313-12-hch-jcswGhMUV9g@public.gmane.org>
2019-06-26 19:04 ` Ira Weiny
2019-06-27 8:50 ` Christoph Hellwig
2019-06-26 12:27 ` [PATCH 12/25] memremap: add a migrate_to_ram method to struct dev_pagemap_ops Christoph Hellwig
[not found] ` <20190626122724.13313-13-hch-jcswGhMUV9g@public.gmane.org>
2019-06-27 16:29 ` Jason Gunthorpe
[not found] ` <20190627162439.GD9499-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2019-06-27 16:53 ` Christoph Hellwig
2019-06-26 12:27 ` [PATCH 13/25] memremap: remove the data field in struct dev_pagemap Christoph Hellwig
2019-06-26 12:27 ` [PATCH 14/25] memremap: replace the altmap_valid field with a PGMAP_ALTMAP_VALID flag Christoph Hellwig
2019-06-26 21:13 ` Ira Weiny
2019-06-26 12:27 ` [PATCH 15/25] memremap: provide an optional internal refcount in struct dev_pagemap Christoph Hellwig
2019-06-26 21:47 ` Ira Weiny
[not found] ` <20190626214750.GC8399-J5EW/p2F9lUlb2qzJQmr9q2pdiUAq4bhAL8bYrjMMd8@public.gmane.org>
2019-06-27 8:51 ` Christoph Hellwig
2019-06-26 12:27 ` [PATCH 16/25] device-dax: use the dev_pagemap internal refcount Christoph Hellwig
[not found] ` <20190626122724.13313-17-hch-jcswGhMUV9g@public.gmane.org>
2019-06-26 21:48 ` Ira Weiny
2019-06-28 15:38 ` Jason Gunthorpe
2019-06-28 16:27 ` Dan Williams
[not found] ` <CAPcyv4joSiFMeYq=D08C-QZSkHz0kRpvRfseNQWrN34Rrm+S7g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-06-28 17:02 ` Jason Gunthorpe
2019-06-28 17:08 ` Dan Williams
[not found] ` <CAPcyv4ja9DVL2zuxuSup8x3VOT_dKAOS8uBQweE9R81vnYRNWg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-06-28 17:10 ` Dan Williams
[not found] ` <CAPcyv4iWTe=vOXUqkr_CguFrFRqgA7hJSt4J0B3RpuP-Okz0Vw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-06-28 18:29 ` Jason Gunthorpe [this message]
2019-06-28 18:44 ` Dan Williams
2019-06-28 18:51 ` Christoph Hellwig
2019-06-28 18:59 ` Dan Williams
2019-06-28 19:02 ` Christoph Hellwig
[not found] ` <20190628190207.GA9317-jcswGhMUV9g@public.gmane.org>
2019-06-28 19:14 ` Dan Williams
2019-07-02 22:35 ` Andrew Morton
2019-06-26 12:27 ` [PATCH 17/25] PCI/P2PDMA: " Christoph Hellwig
[not found] ` <20190626122724.13313-18-hch-jcswGhMUV9g@public.gmane.org>
2019-06-26 21:49 ` Ira Weiny
2019-06-27 18:49 ` Logan Gunthorpe
2019-06-26 12:27 ` [PATCH 18/25] nouveau: use alloc_page_vma directly Christoph Hellwig
2019-06-26 12:27 ` [PATCH 19/25] nouveau: use devm_memremap_pages directly Christoph Hellwig
2019-06-26 12:27 ` [PATCH 20/25] mm: remove hmm_vma_alloc_locked_page Christoph Hellwig
2019-06-27 16:26 ` Jason Gunthorpe
2019-06-26 12:27 ` [PATCH 22/25] mm: simplify ZONE_DEVICE page private data Christoph Hellwig
2019-06-26 12:27 ` [PATCH 23/25] mm: sort out the DEVICE_PRIVATE Kconfig mess Christoph Hellwig
2019-06-26 21:36 ` Ira Weiny
2019-06-26 12:27 ` [PATCH 24/25] mm: remove the HMM config option Christoph Hellwig
[not found] ` <20190626122724.13313-25-hch-jcswGhMUV9g@public.gmane.org>
2019-06-26 21:38 ` Ira Weiny
2019-06-27 16:29 ` Jason Gunthorpe
2019-06-26 12:27 ` [PATCH 25/25] mm: don't select MIGRATE_VMA_HELPER from HMM_MIRROR Christoph Hellwig
2019-06-26 12:27 ` [PATCH 21/25] mm: remove hmm_devmem_add Christoph Hellwig
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