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Add functions to lock specific hash bucket

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Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
This commit is contained in:
Adam Rutkowski 2021-01-08 12:10:28 +01:00 committed by Michal Mielewczyk
parent fd88c2c3a4
commit 93bda499c7
2 changed files with 39 additions and 0 deletions
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28
src/concurrency/ocf_metadata_concurrency.c
View File

@ -221,6 +221,34 @@ int ocf_metadata_hash_try_lock(struct ocf_metadata_lock *metadata_lock,
return 0;
}
void ocf_metadata_lock_hash_rd(struct ocf_metadata_lock *metadata_lock,
ocf_cache_line_t hash)
{
ocf_metadata_start_shared_access(metadata_lock);
ocf_metadata_hash_lock(metadata_lock, hash, OCF_METADATA_RD);
}
void ocf_metadata_unlock_hash_rd(struct ocf_metadata_lock *metadata_lock,
ocf_cache_line_t hash)
{
ocf_metadata_hash_unlock(metadata_lock, hash, OCF_METADATA_RD);
ocf_metadata_end_shared_access(metadata_lock);
}
void ocf_metadata_lock_hash_wr(struct ocf_metadata_lock *metadata_lock,
ocf_cache_line_t hash)
{
ocf_metadata_start_shared_access(metadata_lock);
ocf_metadata_hash_lock(metadata_lock, hash, OCF_METADATA_WR);
}
void ocf_metadata_unlock_hash_wr(struct ocf_metadata_lock *metadata_lock,
ocf_cache_line_t hash)
{
ocf_metadata_hash_unlock(metadata_lock, hash, OCF_METADATA_WR);
ocf_metadata_end_shared_access(metadata_lock);
}
/* NOTE: attempt to acquire hash lock for multiple core lines may end up
* in deadlock. In order to hash lock multiple core lines safely, use
* ocf_req_hash_lock_* functions */

11
src/concurrency/ocf_metadata_concurrency.h
View File

@ -136,6 +136,17 @@ static inline void ocf_metadata_status_bits_unlock(
ocf_metadata_status_bits_unlock(&cache->metadata.lock, \
OCF_METADATA_WR)
/* lock/unlock single hash */
void ocf_metadata_lock_hash_rd(struct ocf_metadata_lock *metadata_lock,
ocf_cache_line_t hash);
void ocf_metadata_unlock_hash_rd(struct ocf_metadata_lock *metadata_lock,
ocf_cache_line_t hash);
void ocf_metadata_lock_hash_wr(struct ocf_metadata_lock *metadata_lock,
ocf_cache_line_t hash);
void ocf_metadata_unlock_hash_wr(struct ocf_metadata_lock *metadata_lock,
ocf_cache_line_t hash);
/* lock/unlock single hash provided core id and core line */
void ocf_metadata_hash_lock_rd(struct ocf_metadata_lock *metadata_lock,
uint32_t core_id, uint64_t core_line);
void ocf_metadata_hash_unlock_rd(struct ocf_metadata_lock *metadata_lock,