[PATCH 0/3] Reduced impact of allocation failures during snapshot creation

[David Sterba <dsterba@suse.com>]

Here's an improvement in allocation of temporary structures during snaphost
creation, namely the root_item. The allocation is moved to the ioctl call, so
it will fail early and not during the transaction commit. I've once hit it in
practice.

It's aimed for 4.5 dev cycle and can be pulled from

  git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git dev/prealloc-subvol

David Sterba (3):
  btrfs: do an allocation earlier during snapshot creation
  btrfs: allocate root item at snapshot ioctl time
  btrfs: preallocate path for snapshot creation at ioctl time

 fs/btrfs/ioctl.c       | 31 ++++++++++++++++++++-----------
 fs/btrfs/transaction.c | 18 +++++++-----------
 fs/btrfs/transaction.h |  2 ++
 3 files changed, 29 insertions(+), 22 deletions(-)

-- 
2.6.2