github/ocf
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Write-only cache mode

Browse Source 
Write-only cache mode is similar to writeback, however read
operations do not promote data to cache. Reads are mostly serviced
by the core device, only dirty sectors are fetched from the cache.

Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
This commit is contained in:
Adam Rutkowski
2019-05-27 14:43:08 -04:00
parent ae6164a49c
commit 82e8c55f4a
17 changed files with 353 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
src/engine/engine_rd.c
View File

@@ -105,7 +105,7 @@ static inline void _ocf_read_generic_submit_hit(struct ocf_request *req)
{
env_atomic_set(&req->req_remaining, ocf_engine_io_count(req));
ocf_submit_cache_reqs(req->cache, req->map, req, OCF_READ,
ocf_submit_cache_reqs(req->cache, req, OCF_READ, 0, req->byte_length,
ocf_engine_io_count(req), _ocf_read_generic_hit_complete);
}
@@ -135,7 +135,7 @@ err_alloc:
_ocf_read_generic_miss_complete(req, -OCF_ERR_NO_MEM);
}
static int _ocf_read_generic_do(struct ocf_request *req)
int ocf_read_generic_do(struct ocf_request *req)
{
struct ocf_cache *cache = req->cache;
@@ -195,7 +195,7 @@ static int _ocf_read_generic_do(struct ocf_request *req)
else
_ocf_read_generic_submit_miss(req);
/* Updata statistics */
/* Update statistics */
ocf_engine_update_request_stats(req);
ocf_engine_update_block_stats(req);
@@ -206,8 +206,8 @@ static int _ocf_read_generic_do(struct ocf_request *req)
}
static const struct ocf_io_if _io_if_read_generic_resume = {
.read = _ocf_read_generic_do,
.write = _ocf_read_generic_do,
.read = ocf_read_generic_do,
.write = ocf_read_generic_do,
.resume = ocf_engine_on_resume,
};
@@ -294,7 +294,7 @@ int ocf_read_generic(struct ocf_request *req)
OCF_DEBUG_RQ(req, "NO LOCK");
} else {
/* Lock was acquired can perform IO */
_ocf_read_generic_do(req);
ocf_read_generic_do(req);
}
} else {
OCF_DEBUG_RQ(req, "LOCK ERROR %d", lock);