[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20190626171445.GA4605@iweiny-DESK2.sc.intel.com>
Date: Wed, 26 Jun 2019 10:14:45 -0700
From: Ira Weiny <ira.weiny@...el.com>
To: Dan Williams <dan.j.williams@...el.com>
Cc: Christoph Hellwig <hch@....de>,
Jérôme Glisse <jglisse@...hat.com>,
Jason Gunthorpe <jgg@...lanox.com>,
Ben Skeggs <bskeggs@...hat.com>, Linux MM <linux-mm@...ck.org>,
nouveau@...ts.freedesktop.org,
Maling list - DRI developers
<dri-devel@...ts.freedesktop.org>,
linux-nvdimm <linux-nvdimm@...ts.01.org>,
linux-pci@...r.kernel.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Michal Hocko <mhocko@...e.com>
Subject: Re: [PATCH 04/25] mm: remove MEMORY_DEVICE_PUBLIC support
On Wed, Jun 26, 2019 at 09:00:47AM -0700, Dan Williams wrote:
> [ add Ira ]
>
> On Wed, Jun 26, 2019 at 5:27 AM Christoph Hellwig <hch@....de> wrote:
> >
> > The code hasn't been used since it was added to the tree, and doesn't
> > appear to actually be usable.
> >
> > Signed-off-by: Christoph Hellwig <hch@....de>
> > Reviewed-by: Jason Gunthorpe <jgg@...lanox.com>
> > Acked-by: Michal Hocko <mhocko@...e.com>
> [..]
> > diff --git a/mm/swap.c b/mm/swap.c
> > index 7ede3eddc12a..83107410d29f 100644
> > --- a/mm/swap.c
> > +++ b/mm/swap.c
> > @@ -740,17 +740,6 @@ void release_pages(struct page **pages, int nr)
> > if (is_huge_zero_page(page))
> > continue;
> >
> > - /* Device public page can not be huge page */
> > - if (is_device_public_page(page)) {
> > - if (locked_pgdat) {
> > - spin_unlock_irqrestore(&locked_pgdat->lru_lock,
> > - flags);
> > - locked_pgdat = NULL;
> > - }
> > - put_devmap_managed_page(page);
> > - continue;
> > - }
> > -
>
> This collides with Ira's bug fix [1]. The MEMORY_DEVICE_FSDAX case
> needs this to be converted to be independent of "public" pages.
> Perhaps it should be pulled out of -mm and incorporated in this
> series.
>
> [1]: https://lore.kernel.org/lkml/20190605214922.17684-1-ira.weiny@intel.com/
Agreed and Andrew picked the first 2 versions of it, mmotm commits:
3eed114b5b6b mm-swap-fix-release_pages-when-releasing-devmap-pages-v2
9b7d8d0f572f mm/swap.c: fix release_pages() when releasing devmap pages
I don't see v3 but there were no objections...
Ira
Powered by blists - more mailing lists