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From: Ross Zwisler <ross.zwisler@linux.intel.com>
To: Eryu Guan <eguan@redhat.com>,
	fstests@vger.kernel.org, Dave Chinner <david@fromorbit.com>
Cc: Jan Kara <jack@suse.cz>,
	linux-nvdimm@lists.01.org, Christoph Hellwig <hch@lst.de>,
Subject: [fstests PATCH v2 0/2] Add test for DAX+ext4+DMA race
Date: Tue, 10 Jul 2018 16:09:40 -0600	[thread overview]
Message-ID: <20180710220942.21074-1-ross.zwisler@linux.intel.com> (raw)

As of kernel version 4.18-rc4, Linux has an issue with ext4+DAX where DMA
and direct I/O operations aren't synchronized with respect to operations
which can change the block mappings of an inode.  This can potentially
lead to data corruption, and is fixed in the following kernel series:


These patches add a regression test for that series.


Changes since v1:
 * Added copyright and license information to files I've previously
   authored in src/.

 * Added copyright, license information and info about the test's
   purpose to src/t_mmap_collision.c. (Dave)

 * Added comments to tests/generic/999 explaining why we unset the
   mount flags for SCRATCH_MNT. (Dave)

 * Subtests in src/t_mmap_collision.c are now conditional based on the
   existence of the necessary FALLOC_FL_* flags. (Eryu)

 * Added the test to the punch, collapse and zero groups. (Eryu)

Ross Zwisler (2):
  src/: add license and copyright info to files
  generic/999: test DAX DMA vs truncate/hole-punch

 .gitignore                          |   1 +
 src/Makefile                        |   2 +-
 src/t_ext4_dax_inline_corruption.c  |   2 +
 src/t_ext4_dax_journal_corruption.c |   2 +
 src/t_mmap_collision.c              | 235 ++++++++++++++++++++++++++++++++++++
 src/t_mmap_cow_race.c               |   2 +
 src/t_mmap_stale_pmd.c              |   2 +
 tests/generic/999                   |  53 ++++++++
 tests/generic/999.out               |   2 +
 tests/generic/group                 |   1 +
 10 files changed, 301 insertions(+), 1 deletion(-)
 create mode 100644 src/t_mmap_collision.c
 create mode 100755 tests/generic/999
 create mode 100644 tests/generic/999.out


Linux-nvdimm mailing list

             reply	other threads:[~2018-07-10 22:09 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-10 22:09 Ross Zwisler [this message]
2018-07-10 22:09 ` [fstests PATCH v2 1/2] src/: add license and copyright info to files Ross Zwisler
2018-07-14 12:54   ` Eryu Guan
2018-07-10 22:09 ` [fstests PATCH v2 2/2] generic/999: test DAX DMA vs truncate/hole-punch Ross Zwisler
2018-07-14  1:41   ` Dave Chinner
2018-07-16 16:07     ` Ross Zwisler
2018-07-14 12:53   ` Eryu Guan
2018-07-27 21:12     ` [fstests PATCH v3] " Ross Zwisler

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