mbox series

[v2,0/2] btrfs: zoned: always set aside a zone for relocation

Message ID 20240515-zoned-gc-v2-0-20c7cb9763cd@kernel.org (mailing list archive)
Headers show
Series btrfs: zoned: always set aside a zone for relocation | expand

Message

Johannes Thumshirn May 15, 2024, 6:43 p.m. UTC 
For zoned filesytsems we heavily rely on relocation for garbage collecting
as we cannot do any in-place updates of disk blocks.

But there can be situations where we're running out of space for doing the
relocation.

To solve this, always have a zone reserved for relocation.

This is a subset of another approach to this problem I've submitted in 
https://lore.kernel.org/r/20240328-hans-v1-0-4cd558959407@kernel.org

---
Changes in v2:
- Incorporate Naohiro's review
- Link to v1: https://lore.kernel.org/r/20240514-zoned-gc-v1-0-109f1a6c7447@kernel.org

---
Johannes Thumshirn (2):
      btrfs: zoned: reserve relocation zone on mount
      btrfs: reserve new relocation zone after successful relocation

 fs/btrfs/disk-io.c    |  2 ++
 fs/btrfs/relocation.c |  7 ++++++
 fs/btrfs/zoned.c      | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++
 fs/btrfs/zoned.h      |  3 +++
 4 files changed, 72 insertions(+)
---
base-commit: d52875a6df98dc77933853e8427bd77f4598a9a7
change-id: 20240514-zoned-gc-2ce793459eb7

Best regards,