On Fri, Sep 14, 2018 at 08:51:13AM -0600, Toshi Kani wrote:
> Sync syscall to DAX file needs to flush processor cache, but it
> currently does not flush to existing DAX files. This is because
> 'ext4_da_aops' is set to address_space_operations of existing DAX
> files, instead of 'ext4_dax_aops', since S_DAX flag is set after
> ext4_set_aops() in the open path.
>
> New file
> --------
> lookup_open
> ext4_create
> __ext4_new_inode
> ext4_set_inode_flags // Set S_DAX flag
> ext4_set_aops // Set aops to ext4_dax_aops
>
> Existing file
> -------------
> lookup_open
> ext4_lookup
> ext4_iget
> ext4_set_aops // Set aops to ext4_da_aops
> ext4_set_inode_flags // Set S_DAX flag
>
> Change ext4_iget() to initialize i_flags before ext4_set_aops().
>
> Fixes: 5f0663bb4a64 ("ext4, dax: introduce ext4_dax_aops")
> Signed-off-by: Toshi Kani <[email protected]>
> Suggested-by: Jan Kara <[email protected]>
> Cc: Jan Kara <[email protected]>
> Cc: Dan Williams <[email protected]>
> Cc: "Theodore Ts'o" <[email protected]>
> Cc: Andreas Dilger <[email protected]>
> Cc: <[email protected]>
Thanks, applied.
- Ted
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