[PATCH v2 0/4] Write-hint for FS journal

Jan Kara
2019-01-24T08:29:33Z

Hello,

On Wed 09-01-19 21:00:57, Kanchan Joshi wrote:
> Towards supporing write-hints/streams for filesystem journal.
>
> Here is the v1 patch for background -
> https://marc.info/?l=linux-fsdevel&m=154444637519020&w=2
>
> Changes since v1:
> - introduce four more hints for in-kernel use, as recommended by Dave chinner
> & Jens axboe. This isolates kernel-mode hints from user-mode ones.
> - remove mount-option to specify write-hint, as recommended by Jan kara &
> Dave chinner. Rather, FS always sets write-hint for journal. This gets ignored
> if device does not support stream.
> - Removed code-redundancy for write_dirty_buffer (Jan kara's review comment)

I guess the series should also go to Jens since he was the original author
of write-hint support so he has the best idea about the architecture.

Honza

> Kanchan Joshi (4):
> block: Increase count of supported write-hints
> fs: introduce four macros for in-kernel hints
> fs: introduce APIs to enable sending write-hint with buffer-head
> fs/ext4,jbd2: add support for passing write-hint with journal.
>
> fs/buffer.c | 18 ++++++++++++++++--
> fs/ext4/super.c | 2 ++
> fs/jbd2/commit.c | 11 +++++++----
> fs/jbd2/journal.c | 3 ++-
> fs/jbd2/revoke.c | 3 ++-
> include/linux/blkdev.h | 5 ++++-
> include/linux/buffer_head.h | 3 +++
> include/linux/fs.h | 5 +++++
> include/linux/jbd2.h | 8 ++++++++
> 9 files changed, 49 insertions(+), 9 deletions(-)
>
> --
> 2.7.4
>
>
--
Jan Kara <jack at suse.com>
SUSE Labs, CR