Hi all,
here's the second version of my patchset to support multiple zoned
drives with dm-zoned.
This patchset:
- Converts the zone array to using xarray for better scalability
- Separates out shared structures into per-device structure
- Enforce drive-locality for allocating and reclaiming zones
- Lifts the restriction of 2 devices to handle an arbitrary number
of drives.
This gives me a near-perfect scalability by increasing the write
speed from 150MB/s (for a cache and one zoned drive) to 300MB/s
(for a cache and two zoned drives).
Changes to v1:
- Include reviews from Damien
- Reshuffle patches
Changes to v2:
- Add reviews from Damien
- Merge patches 'dynamic device allocation' and
'support arbitrary number of devices'
- Fix memory leak when reading tertiary superblocks
Hannes Reinecke (14):
dm-zoned: add debugging message for reading superblocks
dm-zoned: secondary superblock must reside on the same devices than
primary superblock
dm-zoned: improve logging messages for reclaim
dm-zoned: add a 'reserved' zone flag
dm-zoned: convert to xarray
dm-zoned: temporary superblock for tertiary devices
dm-zoned: add device pointer to struct dm_zone
dm-zoned: add metadata pointer to struct dmz_dev
dm-zoned: per-device reclaim
dm-zoned: move random and sequential zones into struct dmz_dev
dm-zoned: support arbitrary number of devices
dm-zoned: allocate zone by device index
dm-zoned: select reclaim zone based on device index
dm-zoned: prefer full zones for reclaim
drivers/md/dm-zoned-metadata.c | 453 +++++++++++++++++++++++++----------------
drivers/md/dm-zoned-reclaim.c | 95 +++++----
drivers/md/dm-zoned-target.c | 169 +++++++++------
drivers/md/dm-zoned.h | 77 ++++---
4 files changed, 485 insertions(+), 309 deletions(-)
--
2.16.4
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