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| author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2016-11-08 11:32:20 +1100 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2016-11-08 11:32:20 +1100 |
| commit | 63e95b5c4f16e156b98adcf2f7d820ba941c82a3 (patch) | |
| tree | d8f6bf08bde092b10bf5222dec67fec720e89376 /include/linux/dax.h | |
| parent | e3ad61c64abceeb5cc122f0bde3700e6e17ca60a (diff) | |
| download | op-kernel-dev-63e95b5c4f16e156b98adcf2f7d820ba941c82a3.zip op-kernel-dev-63e95b5c4f16e156b98adcf2f7d820ba941c82a3.tar.gz | |
dax: coordinate locking for offsets in PMD range
DAX radix tree locking currently locks entries based on the unique
combination of the 'mapping' pointer and the pgoff_t 'index' for the entry.
This works for PTEs, but as we move to PMDs we will need to have all the
offsets within the range covered by the PMD to map to the same bit lock.
To accomplish this, for ranges covered by a PMD entry we will instead lock
based on the page offset of the beginning of the PMD entry. The 'mapping'
pointer is still used in the same way.
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'include/linux/dax.h')
| -rw-r--r-- | include/linux/dax.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/dax.h b/include/linux/dax.h index add6c4b..a41a747 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -22,7 +22,7 @@ int iomap_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf, int dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t); int dax_delete_mapping_entry(struct address_space *mapping, pgoff_t index); void dax_wake_mapping_entry_waiter(struct address_space *mapping, - pgoff_t index, bool wake_all); + pgoff_t index, void *entry, bool wake_all); #ifdef CONFIG_FS_DAX struct page *read_dax_sector(struct block_device *bdev, sector_t n); |
