From: Matthew Wilcox <willy@infradead.org>
To: Dan Williams <dan.j.williams@intel.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>,
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>,
linux-mm@kvack.org, nvdimm@lists.linux.dev,
linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 00/13] Fix the DAX-gup mistake
Date: Fri, 9 Sep 2022 19:11:41 +0100 [thread overview]
Message-ID: <YxuB3cKgitQrR3CQ@casper.infradead.org> (raw)
In-Reply-To: <631a420ad2f28_166f29423@dwillia2-xfh.jf.intel.com.notmuch>
On Thu, Sep 08, 2022 at 12:27:06PM -0700, Dan Williams wrote:
> This thread is mainly about DAX slowly reinventing _mapcount that gets
> managed in all the right places for a normal_page. Longer term I think
> we either need to get back to the page-less DAX experiment and find a
> way to unwind some of this page usage creep, or cut over to finally
> making DAX-pages be normal pages and delete most of the special case
> handling in fs/dax.c. I am open to discussing the former, but I think
> the latter is more likely.
I'm still very much in favour of the former. I've started on replacing
scatterlist with phyr, but haven't got very far yet.
prev parent reply other threads:[~2022-09-09 18:11 UTC|newest]
Thread overview: 33+ 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 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
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 [this message]
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