21:00, Arne Jansen worte:
> Hi Chris,
> 
> since rc-6 seems to be the last rc for 3.0 and in case you're already
> preparing your pull request for 3.1, can you please pull the following
> updates for scrub, based on your for-linus tree (2f7e33d432)?
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/arne/btrfs-unstable-arne.git
> for-chris
> 
> It just contains the readahead patch, which gives a significant
> performance improvement for scrub. Currently scrub is the only
> consumer.
> 
> Thanks,
> Arne
> 
> Arne Jansen (7):
>       btrfs: add an extra wait mode to read_extent_buffer_pages
>       btrfs: add READAHEAD extent buffer flag
>       btrfs: state information for readahead
>       btrfs: initial readahead code and prototypes
>       btrfs: hooks for readahead
>       btrfs: test ioctl for readahead

Do we really want this ioctl that is merely for testing some kernel
APIs in our upstream kernel?

>       btrfs: use readahead API for scrub
> 
>  fs/btrfs/Makefile    |    3 +-
>  fs/btrfs/ctree.h     |   21 ++
>  fs/btrfs/disk-io.c   |   85 +++++-
>  fs/btrfs/disk-io.h   |    2 +
>  fs/btrfs/extent_io.c |    9 +-
>  fs/btrfs/extent_io.h |    4 +
>  fs/btrfs/ioctl.c     |   93 +++++-
>  fs/btrfs/ioctl.h     |   16 +
>  fs/btrfs/reada.c     |  949
> ++++++++++++++++++++++++++++++++++++++++++++++++++
>  fs/btrfs/scrub.c     |  116 +++----
>  fs/btrfs/volumes.c   |    8 +
>  fs/btrfs/volumes.h   |    8 +
>  12 files changed, 1239 insertions(+), 75 deletions(-)
>  create mode 100644 fs/btrfs/reada.c
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