[PATCH v2 0/3] btrfs: adjust overcommit logic and fixes

[Josef Bacik <josef@toxicpanda.com>]

Hello,

This is an update to my original patch

https://lore.kernel.org/linux-btrfs/b97e47ce0ce1d41d221878de7d6090b90aa7a597.1695065233.git.josef@toxicpanda.com/

This was causing failures with btrfs/156 and btrfs/177.  The btrfs/156 problem
was caused by the fact that I was just subtracting 1g from the available space.
I missed a spot where we also limit the chunk size to 10% of the file system, so
I've updated the calculation to be exactly what we choose from the chunk
allocator, and this resovled the btrfs/156 failure.

The btrfs/177 failure was actually due to a underflow in ->free_chunk_space
where we weren't adding the new space we got from btrfs_grow_device.  I also
noticed a slight issue with how we remove space from ->free_chunk_space in
btrfs_srhink_device so I fixed that as well.

With these 3 patches we're no longer seeing the above failures and the original
test case is also fixed.  Thanks,

Josef

Josef Bacik (3):
  btrfs: fix ->free_chunk_space math in btrfs_shrink_device
  btrfs: increase ->free_chunk_space in btrfs_grow_device
  btrfs: adjust overcommit logic when very close to full

 fs/btrfs/space-info.c | 32 ++++++++++++++++++++++++++++++++
 fs/btrfs/volumes.c    | 21 ++++++++++++++++++---
 2 files changed, 50 insertions(+), 3 deletions(-)

-- 
2.41.0