[v3,0/2] Fix DM zone resource limits stacking

Message

Damien Le Moal June 5, 2024, 6:39 a.m. UTC

This is V2 of the patch 4/4 of the series "Zone write plugging and DM
zone fixes". This patch fixes DM zone resource limits stacking (max open
zones and max active zones limits). Patch 1 is new and is added to help
catch problems and eventual regressions of the handling of these limits.

Changes from v2:
 - Modify patch 1 to return an error for the case where the max open
   zones limit is greater than the max active zones limit.
 - Modify patch 2 to avoid duplicated actions on the limits and to
   remove warnings for unusual zone limits.

Changes from v1:
 - Added patch 1
 - Modified patch 2 to not cap the limits for a target with the number
   of sequential zones mapped but rather to use the device limits as is
   when more zones than the limits are mapped and 0 otherwise (no
   limits).

Damien Le Moal (2):
  block: Imporve checks on zone resource limits
  dm: Improve zone resource limits handling

 block/blk-settings.c |   8 ++
 block/blk-zoned.c    |  17 +++-
 drivers/md/dm-zone.c | 220 +++++++++++++++++++++++++++++++++++--------
 3 files changed, 205 insertions(+), 40 deletions(-)