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From: Jason Gunthorpe <jgg@nvidia.com>
To: Dan Williams <dan.j.williams@intel.com>
Cc: akpm@linux-foundation.org, Jan Kara <jack@suse.cz>,
	Christoph Hellwig <hch@lst.de>,
	"Darrick J. Wong" <djwong@kernel.org>,
	John Hubbard <jhubbard@nvidia.com>,
	Matthew Wilcox <willy@infradead.org>,
	linux-mm@kvack.org, nvdimm@lists.linux.dev,
	linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 00/13] Fix the DAX-gup mistake
Date: Tue, 6 Sep 2022 14:29:49 -0300	[thread overview]
Message-ID: <YxeDjTq526iS15Re@nvidia.com> (raw)
In-Reply-To: <6317821d1c465_166f29417@dwillia2-xfh.jf.intel.com.notmuch>

On Tue, Sep 06, 2022 at 10:23:41AM -0700, Dan Williams wrote:

> > Can we continue to have the weird page->refcount behavior and still
> > change the other things?
> 
> No at a minimum the pgmap vs page->refcount problem needs to be solved
> first.

So who will do the put page after the PTE/PMD's are cleared out? In
the normal case the tlb flusher does it integrated into zap..

Can we safely have the put page in the fsdax side after the zap?

Jason

  reply	other threads:[~2022-09-06 17:29 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-04  2:16 [PATCH 00/13] Fix the DAX-gup mistake Dan Williams
2022-09-04  2:16 ` [PATCH 01/13] fsdax: Rename "busy page" to "pinned page" Dan Williams
2022-09-04  2:16 ` [PATCH 02/13] fsdax: Use page_maybe_dma_pinned() for DAX vs DMA collisions Dan Williams
2022-09-06 12:07   ` Jason Gunthorpe
2022-09-04  2:16 ` [PATCH 03/13] fsdax: Delete put_devmap_managed_page_refs() Dan Williams
2022-09-04  2:16 ` [PATCH 04/13] fsdax: Update dax_insert_entry() calling convention to return an error Dan Williams
2022-09-04  2:16 ` [PATCH 05/13] fsdax: Cleanup dax_associate_entry() Dan Williams
2022-09-04  2:16 ` [PATCH 06/13] fsdax: Rework dax_insert_entry() calling convention Dan Williams
2022-09-04  2:16 ` [PATCH 07/13] fsdax: Manage pgmap references at entry insertion and deletion Dan Williams
2022-09-06 12:30   ` Jason Gunthorpe
2022-09-04  2:16 ` [PATCH 08/13] devdax: Minor warning fixups Dan Williams
2022-09-04  2:16 ` [PATCH 09/13] devdax: Move address_space helpers to the DAX core Dan Williams
2022-09-04  5:53   ` kernel test robot
2022-09-04  2:16 ` [PATCH 10/13] dax: Prep dax_{associate, disassociate}_entry() for compound pages Dan Williams
2022-09-04  2:17 ` [PATCH 11/13] devdax: add PUD support to the DAX mapping infrastructure Dan Williams
2022-09-04  2:17 ` [PATCH 12/13] devdax: Use dax_insert_entry() + dax_delete_mapping_entry() Dan Williams
2022-09-04  2:17 ` [PATCH 13/13] mm/gup: Drop DAX pgmap accounting Dan Williams
2022-09-06 13:05 ` [PATCH 00/13] Fix the DAX-gup mistake Jason Gunthorpe
2022-09-06 17:23   ` Dan Williams
2022-09-06 17:29     ` Jason Gunthorpe [this message]
2022-09-06 18:37       ` Dan Williams
2022-09-06 18:49         ` Jason Gunthorpe
2022-09-06 19:41           ` Dan Williams
2022-09-07  0:54             ` Dan Williams
2022-09-07 12:58               ` Jason Gunthorpe
2022-09-07 17:10                 ` Dan Williams
2022-09-07 18:43                   ` Dan Williams
2022-09-07 19:30                     ` Jason Gunthorpe
2022-09-07 20:45                       ` Dan Williams
2022-09-08 18:49                         ` Jason Gunthorpe
2022-09-08 19:27                           ` Dan Williams
2022-09-09 11:53                             ` Jason Gunthorpe
2022-09-09 17:52                               ` Dan Williams
2022-09-09 18:11                             ` Matthew Wilcox

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