From: Shiyang Ruan <ruansy.fnst@cn.fujitsu.com>
To: <linux-kernel@vger.kernel.org>, <linux-xfs@vger.kernel.org>,
<linux-nvdimm@lists.01.org>
Cc: <linux-mm@kvack.org>, <linux-fsdevel@vger.kernel.org>,
<darrick.wong@oracle.com>, <dan.j.williams@intel.com>,
<david@fromorbit.com>, <hch@lst.de>, <rgoldwyn@suse.de>,
<qi.fuli@fujitsu.com>, <y-goto@fujitsu.com>
Subject: [RFC PATCH 0/8] dax: Add a dax-rmap tree to support reflink
Date: Mon, 27 Apr 2020 16:47:42 +0800 [thread overview]
Message-ID: <20200427084750.136031-1-ruansy.fnst@cn.fujitsu.com> (raw)
This patchset is a try to resolve the shared 'page cache' problem for
fsdax.
In order to track multiple mappings and indexes on one page, I
introduced a dax-rmap rb-tree to manage the relationship. A dax entry
will be associated more than once if is shared. At the second time we
associate this entry, we create this rb-tree and store its root in
page->private(not used in fsdax). Insert (->mapping, ->index) when
dax_associate_entry() and delete it when dax_disassociate_entry().
We can iterate the dax-rmap rb-tree before any other operations on
mappings of files. Such as memory-failure and rmap.
Same as before, I borrowed and made some changes on Goldwyn's patchsets.
These patches makes up for the lack of CoW mechanism in fsdax.
The rests are dax & reflink support for xfs.
(Rebased to 5.7-rc2)
Shiyang Ruan (8):
fs/dax: Introduce dax-rmap btree for reflink
mm: add dax-rmap for memory-failure and rmap
fs/dax: Introduce dax_copy_edges() for COW
fs/dax: copy data before write
fs/dax: replace mmap entry in case of CoW
fs/dax: dedup file range to use a compare function
fs/xfs: handle CoW for fsdax write() path
fs/xfs: support dedupe for fsdax
fs/dax.c | 343 +++++++++++++++++++++++++++++++++++++----
fs/ocfs2/file.c | 2 +-
fs/read_write.c | 11 +-
fs/xfs/xfs_bmap_util.c | 6 +-
fs/xfs/xfs_file.c | 10 +-
fs/xfs/xfs_iomap.c | 3 +-
fs/xfs/xfs_iops.c | 11 +-
fs/xfs/xfs_reflink.c | 79 ++++++----
include/linux/dax.h | 11 ++
include/linux/fs.h | 9 +-
mm/memory-failure.c | 63 ++++++--
mm/rmap.c | 54 +++++--
12 files changed, 498 insertions(+), 104 deletions(-)
--
2.26.2
next reply other threads:[~2020-04-27 8:48 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-27 8:47 Shiyang Ruan [this message]
2020-04-27 8:47 ` [RFC PATCH 1/8] fs/dax: Introduce dax-rmap btree for reflink Shiyang Ruan
2020-04-27 8:47 ` [RFC PATCH 2/8] mm: add dax-rmap for memory-failure and rmap Shiyang Ruan
2020-04-27 8:47 ` [RFC PATCH 3/8] fs/dax: Introduce dax_copy_edges() for COW Shiyang Ruan
2020-04-27 8:47 ` [RFC PATCH 4/8] fs/dax: copy data before write Shiyang Ruan
2020-04-27 8:47 ` [RFC PATCH 5/8] fs/dax: replace mmap entry in case of CoW Shiyang Ruan
2020-04-27 8:47 ` [RFC PATCH 6/8] fs/dax: dedup file range to use a compare function Shiyang Ruan
2020-04-27 8:47 ` [RFC PATCH 7/8] fs/xfs: handle CoW for fsdax write() path Shiyang Ruan
2020-04-27 8:47 ` [RFC PATCH 8/8] fs/xfs: support dedupe for fsdax Shiyang Ruan
2020-04-27 12:28 ` [RFC PATCH 0/8] dax: Add a dax-rmap tree to support reflink Matthew Wilcox
2020-04-28 6:09 ` 回复: " Ruan, Shiyang
2020-04-28 6:43 ` Dave Chinner
2020-04-28 9:32 ` Ruan Shiyang
2020-04-28 11:16 ` Matthew Wilcox
2020-04-28 11:24 ` Dave Chinner
2020-04-28 15:37 ` Darrick J. Wong
2020-04-28 22:02 ` Dave Chinner
2020-06-04 7:37 ` Ruan Shiyang
2020-06-04 14:51 ` Darrick J. Wong
2020-06-05 1:30 ` Dave Chinner
2020-06-05 2:30 ` Ruan Shiyang
2020-06-05 2:11 ` Ruan Shiyang
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