mbox series

[v5,0/2] remove BUG_ON()s in btrfs_close_one_device()

Message ID 20191204133639.2382-1-jth@kernel.org (mailing list archive)
Headers show
Series remove BUG_ON()s in btrfs_close_one_device() | expand

Message

Johannes Thumshirn Dec. 4, 2019, 1:36 p.m. UTC
This series attempts to remove the BUG_ON()s in btrfs_close_one_device().
Therefore some reorganization of btrfs_close_one_device() was needed, to
avoid the memory allocation.

This series has passed fstests without any deviation from the baseline.

Changes to v4:
- Clear dev_stat_ccnt on removal (Dave)
- Don't clear BTRFS_DEV_STATE_MISSING and BTRFS_DEV_STATE_FS_METADATA as
  they'll be handled elsewhere
- Release extent_io_tree (fstests)

Changes to v3:
- Clear BTRFS_DEV_STATE_WRITEABLE after calling btrfs_close_bdev() so
  btrfs_close_bdev() can call sync_blockdev() and invalidate_bdev() (Nikolay)

Changes to v2:
- Completly different approach to the origianl patchset, instead of handling
  eventual allocation failures.
- Dropped already merged patches for ' btrfs_fs_devices::rotating' and
  'btrfs_fs_devices::seeding'
- Kept the 1st patch of the old series, as it's a nice cleanup

Changes to v1:
- Fixed the decremt of btrfs_fs_devices::seeding.
- In addition to this, I've added two patches changing btrfs_fs_devices::seeding
  and btrfs_fs_devices::rotating to bool, as they are in fact used as booleans.



Johannes Thumshirn (2):
  btrfs: decrement number of open devices after closing the device not
    before
  btrfs: reset device back to allocation state when removing

 fs/btrfs/volumes.c | 31 ++++++++++++-------------------
 1 file changed, 12 insertions(+), 19 deletions(-)

Comments

David Sterba Dec. 10, 2019, 10:10 a.m. UTC | #1
On Wed, Dec 04, 2019 at 02:36:37PM +0100, Johannes Thumshirn wrote:
> This series attempts to remove the BUG_ON()s in btrfs_close_one_device().
> Therefore some reorganization of btrfs_close_one_device() was needed, to
> avoid the memory allocation.
> 
> This series has passed fstests without any deviation from the baseline.
> 
> Changes to v4:
> - Clear dev_stat_ccnt on removal (Dave)
> - Don't clear BTRFS_DEV_STATE_MISSING and BTRFS_DEV_STATE_FS_METADATA as
>   they'll be handled elsewhere
> - Release extent_io_tree (fstests)

Passed fstests, I don't see any other obvious problems so I'll add it to
misc-next.