From: Dan Williams <dan.j.williams@intel.com>
To: Bob Liu <bob.liu@oracle.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
"J. Bruce Fields" <bfields@fieldses.org>,
"Theodore Ts'o" <tytso@mit.edu>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Andreas Dilger <adilger.kernel@dilger.ca>,
Dave Chinner <david@fromorbit.com>,
Ingo Molnar <mingo@redhat.com>, Jan Kara <jack@suse.com>,
Jeff Layton <jlayton@poochiereds.net>,
Matthew Wilcox <willy@linux.intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
linux-ext4 <linux-ext4@vger.kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Linux MM <linux-mm@kvack.org>,
linux-nvdimm <linux-nvdimm@ml01.01.org>, X86 ML <x86@kernel.org>,
XFS Developers <xfs@oss.sgi.com>,
Andrew Morton <akpm@linux-foundation.org>,
Matthew Wilcox <matthew.r.wilcox@intel.com>,
Dave Hansen <dave.hansen@linux.intel.com>
Subject: Re: [PATCH v6 2/7] dax: support dirty DAX entries in radix tree
Date: Wed, 30 Dec 2015 12:39:04 -0800 [thread overview]
Message-ID: <CAPcyv4jAO-jJ3VCOJRCc7zrQULED362SdZ88dDgN+zfQQEsfsA@mail.gmail.com> (raw)
In-Reply-To: <56838FA3.5030909@oracle.com>
On Wed, Dec 30, 2015 at 12:02 AM, Bob Liu <bob.liu@oracle.com> wrote:
> Hi Ross,
>
> On 12/24/2015 03:39 AM, Ross Zwisler wrote:
>> Add support for tracking dirty DAX entries in the struct address_space
>> radix tree. This tree is already used for dirty page writeback, and it
>> already supports the use of exceptional (non struct page*) entries.
>>
>> In order to properly track dirty DAX pages we will insert new exceptional
>> entries into the radix tree that represent dirty DAX PTE or PMD pages.
>
> I may get it wrong, but there is "struct page" for persistent memory after
> "[PATCH v4 00/18]get_user_pages() for dax pte and pmd mappings".
> So why not just add "struct page" to radix tree directly just like normal page cache?
>
> Then we don't need to deal with any exceptional entries and special writeback.
That "struct page" is optional and fsync/msync needs to operate in its absence.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2015-12-30 20:39 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-23 19:39 [PATCH v6 0/7] DAX fsync/msync support Ross Zwisler
2015-12-23 19:39 ` [PATCH v6 1/7] pmem: add wb_cache_pmem() to the PMEM API Ross Zwisler
2015-12-23 19:39 ` [PATCH v6 2/7] dax: support dirty DAX entries in radix tree Ross Zwisler
2015-12-30 8:02 ` Bob Liu
2015-12-30 20:39 ` Dan Williams [this message]
2015-12-31 3:28 ` Bob Liu
2015-12-31 22:08 ` Dan Williams
2016-01-05 9:41 ` Jan Kara
2015-12-23 19:39 ` [PATCH v6 3/7] mm: add find_get_entries_tag() Ross Zwisler
2015-12-24 0:28 ` Elliott, Robert (Persistent Memory)
2015-12-23 19:39 ` [PATCH v6 4/7] dax: add support for fsync/msync Ross Zwisler
2016-01-03 18:13 ` Dan Williams
2016-01-05 11:13 ` Jan Kara
2016-01-05 15:50 ` Ross Zwisler
2016-01-06 18:10 ` Ross Zwisler
2016-01-05 11:13 ` Jan Kara
2016-01-05 17:12 ` Ross Zwisler
2016-01-05 17:20 ` Dan Williams
2016-01-05 18:14 ` Ross Zwisler
2016-01-05 18:22 ` Dan Williams
2015-12-23 19:39 ` [PATCH v6 5/7] ext2: call dax_pfn_mkwrite() for DAX fsync/msync Ross Zwisler
2015-12-23 19:39 ` [PATCH v6 6/7] ext4: " Ross Zwisler
2015-12-23 19:39 ` [PATCH v6 7/7] xfs: " Ross Zwisler
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAPcyv4jAO-jJ3VCOJRCc7zrQULED362SdZ88dDgN+zfQQEsfsA@mail.gmail.com \
--to=dan.j.williams@intel.com \
--cc=adilger.kernel@dilger.ca \
--cc=akpm@linux-foundation.org \
--cc=bfields@fieldses.org \
--cc=bob.liu@oracle.com \
--cc=dave.hansen@linux.intel.com \
--cc=david@fromorbit.com \
--cc=hpa@zytor.com \
--cc=jack@suse.com \
--cc=jlayton@poochiereds.net \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-nvdimm@ml01.01.org \
--cc=matthew.r.wilcox@intel.com \
--cc=mingo@redhat.com \
--cc=ross.zwisler@linux.intel.com \
--cc=tglx@linutronix.de \
--cc=tytso@mit.edu \
--cc=viro@zeniv.linux.org.uk \
--cc=willy@linux.intel.com \
--cc=x86@kernel.org \
--cc=xfs@oss.sgi.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).