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From: Christoph Hellwig <hch@lst.de>
To: Dan Williams <dan.j.williams@intel.com>
Cc: linux-mm@kvack.org, "Jérôme Glisse" <jglisse@redhat.com>,
	linux-nvdimm@lists.01.org
Subject: revamp vmem_altmap / dev_pagemap handling
Date: Thu,  7 Dec 2017 07:08:26 -0800	[thread overview]
Message-ID: <20171207150840.28409-1-hch@lst.de> (raw)

Hi all,

this series started with two patches from Logan that now are in the
middle of the series to kill the memremap-internal pgmap structure
and to redo the dev_memreamp_pages interface to be better suitable
for future PCI P2P uses.  I reviewed them and noticed that there
isn't really any good reason to keep struct vmem_altmap either,
and that a lot of these alternative device page map access should
be better abstracted out instead of being sprinkled all over the
mm code.

Please review carefully, this has only been tested with my legacy
e820 NVDIMM system.
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WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Dan Williams <dan.j.williams@intel.com>
Cc: "Jérôme Glisse" <jglisse@redhat.com>,
	"Logan Gunthorpe" <logang@deltatee.com>,
	linux-nvdimm@lists.01.org, linux-mm@kvack.org
Subject: revamp vmem_altmap / dev_pagemap handling
Date: Thu,  7 Dec 2017 07:08:26 -0800	[thread overview]
Message-ID: <20171207150840.28409-1-hch@lst.de> (raw)

Hi all,

this series started with two patches from Logan that now are in the
middle of the series to kill the memremap-internal pgmap structure
and to redo the dev_memreamp_pages interface to be better suitable
for future PCI P2P uses.  I reviewed them and noticed that there
isn't really any good reason to keep struct vmem_altmap either,
and that a lot of these alternative device page map access should
be better abstracted out instead of being sprinkled all over the
mm code.

Please review carefully, this has only been tested with my legacy
e820 NVDIMM system.

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             reply	other threads:[~2017-12-07 15:04 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-07 15:08 Christoph Hellwig [this message]
2017-12-07 15:08 ` revamp vmem_altmap / dev_pagemap handling Christoph Hellwig
2017-12-07 15:08 ` [PATCH 01/14] mm: move get_dev_pagemap out of line Christoph Hellwig
2017-12-07 15:08   ` Christoph Hellwig
2017-12-07 18:34   ` Logan Gunthorpe
2017-12-07 18:34     ` Logan Gunthorpe
2017-12-07 15:08 ` [PATCH 02/14] mm: optimize dev_pagemap reference counting around get_dev_pagemap Christoph Hellwig
2017-12-07 15:08   ` Christoph Hellwig
2017-12-07 18:46   ` Logan Gunthorpe
2017-12-07 18:46     ` Logan Gunthorpe
2017-12-07 15:08 ` [PATCH 03/14] mm: better abstract out dev_pagemap freeing Christoph Hellwig
2017-12-07 15:08   ` Christoph Hellwig
2017-12-07 18:49   ` Logan Gunthorpe
2017-12-07 18:49     ` Logan Gunthorpe
2017-12-07 15:08 ` [PATCH 04/14] mm: better abstract out dev_pagemap alloc Christoph Hellwig
2017-12-07 15:08   ` Christoph Hellwig
2017-12-07 18:52   ` Logan Gunthorpe
2017-12-07 18:52     ` Logan Gunthorpe
2017-12-07 15:08 ` [PATCH 05/14] mm: better abstract out dev_pagemap offset calculation Christoph Hellwig
2017-12-07 15:08   ` Christoph Hellwig
2017-12-07 18:54   ` Logan Gunthorpe
2017-12-07 18:54     ` Logan Gunthorpe
2017-12-07 15:08 ` [PATCH 06/14] mm: better abstract out dev_pagemap start_pfn Christoph Hellwig
2017-12-07 15:08   ` Christoph Hellwig
2017-12-07 18:57   ` Logan Gunthorpe
2017-12-07 18:57     ` Logan Gunthorpe
2017-12-07 15:08 ` [PATCH 07/14] mm: split dev_pagemap memory map allocation from normal case Christoph Hellwig
2017-12-07 15:08   ` Christoph Hellwig
2017-12-07 19:08   ` Logan Gunthorpe
2017-12-07 19:08     ` Logan Gunthorpe
2017-12-07 15:08 ` [PATCH 08/14] mm: merge vmem_altmap_alloc into dev_pagemap_alloc_block_buf Christoph Hellwig
2017-12-07 15:08   ` Christoph Hellwig
2017-12-07 19:14   ` Logan Gunthorpe
2017-12-07 19:14     ` Logan Gunthorpe
2017-12-07 15:08 ` [PATCH 09/14] memremap: drop private struct page_map Christoph Hellwig
2017-12-07 15:08   ` Christoph Hellwig
2017-12-07 15:08 ` [PATCH 10/14] memremap: change devm_memremap_pages interface to use struct dev_pagemap Christoph Hellwig
2017-12-07 15:08   ` Christoph Hellwig
2017-12-08  4:03   ` Dan Williams
2017-12-07 15:08 ` [PATCH 11/14] memremap: simplify duplicate region handling in devm_memremap_pages Christoph Hellwig
2017-12-07 15:08   ` Christoph Hellwig
2017-12-07 19:34   ` Logan Gunthorpe
2017-12-07 19:34     ` Logan Gunthorpe
2017-12-07 15:08 ` [PATCH 12/14] memremap: remove find_dev_pagemap Christoph Hellwig
2017-12-07 15:08   ` Christoph Hellwig
2017-12-07 19:35   ` Logan Gunthorpe
2017-12-07 19:35     ` Logan Gunthorpe
2017-12-07 15:08 ` [PATCH 13/14] memremap: remove struct vmem_altmap Christoph Hellwig
2017-12-07 15:08   ` Christoph Hellwig
2017-12-07 19:40   ` Logan Gunthorpe
2017-12-07 19:40     ` Logan Gunthorpe
2017-12-07 15:08 ` [PATCH 14/14] memremap: RCU protect data returned from dev_pagemap lookups Christoph Hellwig
2017-12-07 15:08   ` Christoph Hellwig
2017-12-07 19:53   ` Logan Gunthorpe
2017-12-07 19:53     ` Logan Gunthorpe
2017-12-08  4:14 ` revamp vmem_altmap / dev_pagemap handling Williams, Dan J
2017-12-08  4:14   ` Williams, Dan J

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