On Wed, 2020-05-27 at 09:41 -0400, Mike Snitzer wrote: > On Wed, May 27 2020 at 2:22am -0400, > Hannes Reinecke <hare@xxxxxxx> wrote: > > > 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 > > > > Hannes Reinecke (15): > > 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: allocate dm devices dynamically > > 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 | 448 ++++++++++++++++++++++++----------------- > > drivers/md/dm-zoned-reclaim.c | 95 +++++---- > > drivers/md/dm-zoned-target.c | 169 ++++++++++------ > > drivers/md/dm-zoned.h | 77 ++++--- > > 4 files changed, 481 insertions(+), 308 deletions(-) > > Would you still like to wait until the 5.9 merge window? > > Or would you prefer to see these changes land for 5.8 so as to limit the > variants of related code that needs to be supported? > > If you and Damien are OK with 5.8 (and testing backs that up) then I > should be able to get it to land. Yes, it would be nice to have all the recent changes under dm-zoned V2. I just reviewed Hannes V2 series and I am running tests right now. So far so good. Will send results by the end of my day. What is your deadline for a final series to make it to 5.8 ? This end of week ? If Hannes has time to rework another round, we should be good then. Thanks. > > Let me know, thanks. > Mike > -- Damien Le Moal Western Digital Research -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
