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Merge branch 'for-4.10/fs-unmap' of git://git.kernel.dk/linux-block

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Pull fs meta data unmap optimization from Jens Axboe:
 "A series from Jan Kara, providing a more efficient way for unmapping
  meta data from in the buffer cache than doing it block-by-block.

  Provide a general helper that existing callers can use"

* 'for-4.10/fs-unmap' of git://git.kernel.dk/linux-block:
  fs: Remove unmap_underlying_metadata
  fs: Add helper to clean bdev aliases under a bh and use it
  ext2: Use clean_bdev_aliases() instead of iteration
  ext4: Use clean_bdev_aliases() instead of iteration
  direct-io: Use clean_bdev_aliases() instead of handmade iteration
  fs: Provide function to unmap metadata for a range of blocks
This commit is contained in:
Linus Torvalds 2016-12-14 17:09:00 -08:00
commit 80eabba702
13 changed files with 104 additions and 95 deletions
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9
fs/ext2/inode.c
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@ -732,16 +732,13 @@ static int ext2_get_blocks(struct inode *inode,
}
if (IS_DAX(inode)) {
int i;
/*
* We must unmap blocks before zeroing so that writeback cannot
* overwrite zeros with stale data from block device page cache.
*/
for (i = 0; i < count; i++) {
unmap_underlying_metadata(inode->i_sb->s_bdev,
le32_to_cpu(chain[depth-1].key) + i);
}
clean_bdev_aliases(inode->i_sb->s_bdev,
le32_to_cpu(chain[depth-1].key),
count);
/*
* block must be initialised before we put it in the tree
* so that it's not found by another thread before it's