To prevent deinitializing cleaner context (i.e. during switching policy) during
processing requests, access to cleaner should be protected with reference
counter
Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
Making the operation asynchronous will allow to use refcnt utility as an
synchronization mechanism between processing cachelines and deinitializing
cleaning policy.
Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
The change should unify access to cleaning policy resources and facilitate
synchronization when switching cleaning policies
Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
All remapped cachelines are write locked. If the operation fails cachelines has
to be unlocked during rollback
Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
ocf_lru_get_list() now returs clean list for freelist partition to
provide common interface regardless of partition type.
Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
Flushing metadata in WT is required only if at least of the request's cacheline
changed its state to clean.
Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
There's a possibility that WT write is performed to dirty cache line (i.e. after
switching WB->WT without flush) and status bits change from dirty to clean. If
power failure occurs it might happen that recovery would ignore recent data from
cache and would assume that data is clean while backend storage data is out of
date.
Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
In WB mode metadata should be updated only if the actuall data had been saved
on disk. Otherwise metadata might be flushed too early and consequently data
corruption might occur.
Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
src/eviction/lru.c -> src/ocf_lru.c
src/eviction/lru.h -> src/ocf_lru.h
src/eviction/lru_structs.h -> src/ocf_lru_structs.h
src/eviction/eviction.c -> src/ocf_space.c
src/eviction/eviction.h -> src/ocf_space.h
.. as well as corresponding UT files.
Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
... in UT as well
Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
New structure ocf_part is added to contain all the data common for both
user partitions and freelist partition: part_runtime and part_id.
ocf_user_part now contains ocf_part structure as well as pointer to
cleaning partition runtime metadata (moved out from part_runtime) and
user partition config (no change here).
Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
