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| author | Dan Williams <dan.j.williams@intel.com> | 2017-05-29 13:07:46 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-06-15 14:35:24 -0700 |
| commit | 6318770a7d43a4166b6a8e3cef62e4a019d3c95e (patch) | |
| tree | ab8deaaa5fbbd07cacb8e951d36fd9c7568aee97 /fs/dax.c | |
| parent | abebfbe2f7315dd3ec9a0c69596a76e32beb5749 (diff) | |
| download | lwn-6318770a7d43a4166b6a8e3cef62e4a019d3c95e.tar.gz lwn-6318770a7d43a4166b6a8e3cef62e4a019d3c95e.zip | |
filesystem-dax: convert to dax_flush()
Filesystem-DAX flushes caches whenever it writes to the address returned
through dax_direct_access() and when writing back dirty radix entries.
That flushing is only required in the pmem case, so the dax_flush()
helper skips cache management work when the underlying driver does not
specify a flush method.
We still do all the dirty tracking since the radix entry will already be
there for locking purposes. However, the work to clean the entry will be
a nop for some dax drivers.
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'fs/dax.c')
| -rw-r--r-- | fs/dax.c | 2 |
1 files changed, 1 insertions, 1 deletions
@@ -784,7 +784,7 @@ static int dax_writeback_one(struct block_device *bdev, } dax_mapping_entry_mkclean(mapping, index, pfn_t_to_pfn(pfn)); - wb_cache_pmem(kaddr, size); + dax_flush(dax_dev, pgoff, kaddr, size); /* * After we have flushed the cache, we can clear the dirty tag. There * cannot be new dirty data in the pfn after the flush has completed as |