On 19.07.2018 14:05, David Sterba wrote:
> A handful of removed structure members that are not used,
> async_submit_bio is down by 16 bytes and async_cow by 8.
>
> Some of the extent_io_ops callbacks are unnecessarily called indirectly.
> The rest of extent_io_ops is going to be transformed in following
> series.
>
> David Sterba (7):
> btrfs: remove unused member async_submit_bio::fs_info
> btrfs: remove unused member async_submit_bio::bio_flags
> btrfs: remove redundant member async_cow::root
> btrfs: unify end_io callbacks of async_submit_bio
> btrfs: drop extent_io_ops::tree_fs_info callback
> btrfs: drop extent_io_ops::merge_bio_hook callback
> btrfs: drop extent_io_ops::set_range_writeback callback
>
> fs/btrfs/compression.c | 10 +++-------
> fs/btrfs/ctree.h | 2 +-
> fs/btrfs/disk-io.c | 42 +++---------------------------------------
> fs/btrfs/disk-io.h | 5 +++--
> fs/btrfs/extent_io.c | 28 +++++++---------------------
> fs/btrfs/extent_io.h | 8 --------
> fs/btrfs/inode.c | 32 ++++++++------------------------
> 7 files changed, 25 insertions(+), 102 deletions(-)
>
For the whole series (apart from my comments on 6/7):
Reviewed-by: Nikolay Borisov <[email protected]>
I'm guessing this will alleviate some of the performance hit stemming
from spectre/meltdown mitigations.
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