diff options
| author |  Shiyang Ruan <ruansy.fnst@fujitsu.com>
| 2022-12-01 15:28:54 +0000 |
|---|---|---|
| committer |  Andrew Morton <akpm@linux-foundation.org>
| 2022-12-11 18:12:16 -0800 |
| commit | c6f0b395b2110aa26a134a9a395875b1ec0a5aae (patch) | |
| tree | 64ca3a7ffebef5aeb3f4c683875e7e485bdcd114 /fs/xfs | |
| parent | fsdax: zero the edges if source is HOLE or UNWRITTEN (diff) | |
| download | linux-c6f0b395b2110aa26a134a9a395875b1ec0a5aae.tar.gz linux-c6f0b395b2110aa26a134a9a395875b1ec0a5aae.tar.bz2 linux-c6f0b395b2110aa26a134a9a395875b1ec0a5aae.zip | |
fsdax,xfs: set the shared flag when file extent is shared
If a dax page is shared, mapread at different offsets can also trigger
page fault on same dax page. So, change the flag from "cow" to "shared".
And get the shared flag from filesystem when read.
Link: https://lkml.kernel.org/r/1669908538-55-5-git-send-email-ruansy.fnst@fujitsu.com
Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/xfs_iomap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index 07da03976ec1..881de99766ca 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -1215,7 +1215,7 @@ xfs_read_iomap_begin( return error; error = xfs_bmapi_read(ip, offset_fsb, end_fsb - offset_fsb, &imap, &nimaps, 0); - if (!error && (flags & IOMAP_REPORT)) + if (!error && ((flags & IOMAP_REPORT) || IS_DAX(inode))) error = xfs_reflink_trim_around_shared(ip, &imap, &shared); xfs_iunlock(ip, lockmode); |