From: Christoph Hellwig <hch@lst.de>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Dan Williams <dan.j.williams@intel.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Boaz Harrosh <boaz@plexistor.com>, Jan Kara <jack@suse.cz>,
Mike Snitzer <snitzer@redhat.com>, Neil Brown <neilb@suse.de>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Dave Hansen <dave.hansen@linux.intel.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Chris Mason <clm@fb.com>, Paul Mackerras <paulus@samba.org>,
"H. Peter Anvin" <hpa@zytor.com>, Christoph Hellwig <hch@lst.de>,
Alasdair Kergon <agk@redhat.com>,
"linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>,
Ingo Molnar <mingo@kernel.org>, Mel Gorman <mgorman@suse.de>,
Matthew Wilcox <willy@linux.intel.com>,
Ross Zwisler <ross.zwisler@linux.intel.com>,
Rik van Riel <riel@redhat.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Jens Axboe <axboe@kernel.dk>, Theodore Ts'o <tytso@mit.edu>,
"Martin K. Peter
Subject: Re: [PATCH v2 00/10] evacuate struct page from the block layer, introduce __pfn_t
Date: Thu, 7 May 2015 18:18:07 +0200 [thread overview]
Message-ID: <20150507161807.GA1671@lst.de> (raw)
In-Reply-To: <CA+55aFza6YzfPqy9pi+up-q5FC9Z2WjLkGoX4F6ZCSUYE-2a+Q@mail.gmail.com>
On Wed, May 06, 2015 at 05:19:48PM -0700, Linus Torvalds wrote:
> What is the primary thing that is driving this need? Do we have a very
> concrete example?
FYI, I plan to to implement RAID acceleration using nvdimms, and I plan to
ue pages for that. The code just merge for 4.1 can easily support page
backing, and I plan to use that for now. This still leaves support
for the gigantic intel nvdimms discovered over EFI out, but given that
I don't have access to them, and I dont know of any publically available
there's little I can do for now. But adding on demand allocate struct
pages for the seems like the easiest way forward. Boaz already has
code to allocate pages for them, although not on demand but at boot / plug in
time.
next prev parent reply other threads:[~2015-05-07 16:18 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-06 20:04 [PATCH v2 00/10] evacuate struct page from the block layer, introduce __pfn_t Dan Williams
2015-05-06 20:04 ` [PATCH v2 01/10] arch: introduce __pfn_t for persistent memory i/o Dan Williams
2015-05-07 14:55 ` Stephen Rothwell
2015-05-08 0:21 ` Dan Williams
2015-05-06 20:05 ` [PATCH v2 02/10] block: add helpers for accessing a bio_vec page Dan Williams
2015-05-08 15:59 ` Dan Williams
2015-05-06 20:05 ` [PATCH v2 03/10] block: convert .bv_page to .bv_pfn bio_vec Dan Williams
2015-05-06 20:05 ` [PATCH v2 04/10] dma-mapping: allow archs to optionally specify a ->map_pfn() operation Dan Williams
2015-05-06 20:05 ` [PATCH v2 05/10] scatterlist: use sg_phys() Dan Williams
2015-05-06 20:05 ` [PATCH v2 06/10] scatterlist: support "page-less" (__pfn_t only) entries Dan Williams
2015-05-06 20:05 ` [PATCH v2 07/10] x86: support dma_map_pfn() Dan Williams
2015-05-06 20:05 ` [PATCH v2 08/10] x86: support kmap_atomic_pfn_t() for persistent memory Dan Williams
2015-05-06 20:20 ` [Linux-nvdimm] " Dan Williams
2015-05-06 20:05 ` [PATCH v2 09/10] dax: convert to __pfn_t Dan Williams
2015-05-06 20:05 ` [PATCH v2 10/10] block: base support for pfn i/o Dan Williams
2015-05-06 20:50 ` [PATCH v2 00/10] evacuate struct page from the block layer, introduce __pfn_t Al Viro
2015-05-06 22:10 ` Linus Torvalds
2015-05-06 23:47 ` Dan Williams
2015-05-07 0:19 ` Linus Torvalds
2015-05-07 2:36 ` Dan Williams
2015-05-07 9:02 ` Ingo Molnar
2015-05-07 14:42 ` Ingo Molnar
2015-05-07 15:52 ` Dan Williams
2015-05-07 17:52 ` Ingo Molnar
2015-05-07 15:00 ` Linus Torvalds
2015-05-07 15:40 ` Dan Williams
2015-05-07 15:58 ` Linus Torvalds
2015-05-07 16:03 ` Dan Williams
2015-05-07 17:36 ` Ingo Molnar
2015-05-07 17:42 ` Dan Williams
2015-05-07 17:56 ` Dave Hansen
2015-05-07 19:11 ` Ingo Molnar
2015-05-07 19:36 ` Jerome Glisse
2015-05-07 19:48 ` Ingo Molnar
2015-05-07 19:53 ` Ingo Molnar
2015-05-07 20:18 ` Jerome Glisse
2015-05-08 5:37 ` Ingo Molnar
2015-05-08 9:20 ` Al Viro
2015-05-08 9:26 ` Ingo Molnar
2015-05-08 10:00 ` Al Viro
2015-05-08 13:45 ` Rik van Riel
2015-05-08 14:05 ` Ingo Molnar
2015-05-08 14:40 ` John Stoffel
2015-05-08 15:54 ` Linus Torvalds
2015-05-08 16:28 ` Al Viro
2015-05-08 16:59 ` Rik van Riel
2015-05-09 1:14 ` Linus Torvalds
2015-05-09 3:02 ` Rik van Riel
2015-05-09 3:52 ` Linus Torvalds
2015-05-09 21:56 ` Dave Chinner
2015-05-09 8:45 ` "Directly mapped persistent memory page cache" Ingo Molnar
2015-05-09 15:51 ` Eric W. Biederman
2015-05-10 10:07 ` Ingo Molnar
2015-05-09 18:24 ` Dan Williams
2015-05-10 9:46 ` Ingo Molnar
2015-05-10 17:29 ` Dan Williams
2015-05-11 8:25 ` Dave Chinner
2015-05-11 9:18 ` Ingo Molnar
2015-05-11 10:12 ` Zuckerman, Boris
2015-05-11 10:38 ` Ingo Molnar
2015-05-11 14:51 ` Jeff Moyer
2015-05-12 0:53 ` Dave Chinner
2015-05-12 14:47 ` Jerome Glisse
2015-06-05 5:43 ` Dan Williams
2015-05-11 14:31 ` Matthew Wilcox
2015-05-11 20:01 ` Jerome Glisse
2015-05-08 20:40 ` [PATCH v2 00/10] evacuate struct page from the block layer, introduce __pfn_t John Stoffel
2015-05-08 14:54 ` Rik van Riel
2015-05-07 17:43 ` Linus Torvalds
2015-05-07 20:06 ` Dan Williams
2015-05-07 16:18 ` Christoph Hellwig [this message]
2015-05-07 16:41 ` Dan Williams
2015-05-07 18:40 ` Ingo Molnar
2015-05-07 19:44 ` Dan Williams
2015-05-07 17:30 ` Jerome Glisse
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