linux-ext4 - [PATCH v2 0/3] fix sync to flush processor cache for ext2/4 DAX files

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Date:   Fri, 14 Sep 2018 08:51:11 -0600
From:   Toshi Kani <toshi.kani@....com>
To:     jack@...e.cz, dan.j.williams@...el.com
Cc:     tytso@....edu, adilger.kernel@...ger.ca,
        linux-ext4@...r.kernel.org, linux-nvdimm@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/3] fix sync to flush processor cache for ext2/4 DAX files

This patchset fixes issues that sync syscall to existing DAX ex2/4
files does not flush processor cache.

Patch 1/3 adds .bmap to ext4_dax_aops so that mount -o dax works for
the journal inode.

Patch 2/3 fixes the ext4 issue by setting i_flags before ext4_set_aops()
in ext4_iget().

Patch 3/3 fixes the ext2 issue by setting i_flags before ext2_set_aops()
in ext2_iget(), i.e. same as ext4.

v2:
 - Add .bmap to ext4_dax_aops, instead of disabling dax for the journal
   inode. (Jan Kara)
 - Initialize i_flags early in ext4_iget(). (Jan Kara)
 - Update Fixes tag and add Cc to Stable. (Dan Williams)
 - Add fix to ext2.

---
Toshi Kani (3):
 1/3 ext4, dax: add ext4_bmap to ext4_dax_aops
 2/3 ext4, dax: set ext4_dax_aops for dax files
 3/3 ext2, dax: set ext2_dax_aops for dax files

---
 fs/ext2/inode.c | 2 +-
 fs/ext4/inode.c | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)