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Write-only cache mode

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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
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4
src/engine/engine_wt.c
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@@ -87,7 +87,7 @@ static inline void _ocf_write_wt_submit(struct ocf_request *req)
}
/* To cache */
ocf_submit_cache_reqs(cache, req->map, req, OCF_WRITE,
ocf_submit_cache_reqs(cache, req, OCF_WRITE, 0, req->byte_length,
ocf_engine_io_count(req), _ocf_write_wt_cache_complete);
/* To core */
@@ -145,7 +145,7 @@ static int _ocf_write_wt_do(struct ocf_request *req)
/* Submit IO */
_ocf_write_wt_submit(req);
/* Updata statistics */
/* Update statistics */
ocf_engine_update_request_stats(req);
ocf_engine_update_block_stats(req);