github/ocf
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add function to check for lazy write cache mode (WO or WB)

Browse Source 
Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
This commit is contained in:
Adam Rutkowski 2019-06-04 13:29:45 -04:00
parent a6312eb8aa
commit b97bb6f53b
4 changed files with 28 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
inc/ocf_mngt.h
View File

@ -695,6 +695,17 @@ typedef void (*ocf_mngt_cache_save_end_t)(ocf_cache_t cache,
void ocf_mngt_cache_save(ocf_cache_t cache,
ocf_mngt_cache_save_end_t cmpl, void *priv);
/**
* @brief Determines whether given cache mode has write-back semantics, i.e. it
* allows for writes to be serviced in cache and lazily propagated to core.
*
* @param[in] mode input cache mode
*/
static inline bool ocf_mngt_cache_mode_has_lazy_write(ocf_cache_mode_t mode)
{
return mode == ocf_cache_mode_wb || mode == ocf_cache_mode_wo;
}
/**
* @brief Set cache mode in given cache
*

7
src/engine/cache_engine.h
View File

@ -59,6 +59,13 @@ static inline bool ocf_cache_mode_is_valid(ocf_cache_mode_t mode)
return mode >= ocf_cache_mode_wt && mode < ocf_cache_mode_max;
}
static inline bool ocf_req_cache_mode_has_lazy_write(ocf_req_cache_mode_t mode)
{
return ocf_cache_mode_is_valid((ocf_cache_mode_t)mode) &&
ocf_mngt_cache_mode_has_lazy_write(
(ocf_cache_mode_t)mode);
}
void ocf_seq_cutoff_update(ocf_core_t core, struct ocf_request *req);
bool ocf_fallback_pt_is_on(ocf_cache_t cache);

4
src/mngt/ocf_mngt_cache.c
View File

@ -2147,8 +2147,10 @@ static int _cache_mngt_set_cache_mode(ocf_cache_t cache, ocf_cache_mode_t mode)
cache->conf_meta->cache_mode = mode;
if (mode_old == ocf_cache_mode_wb)
if (ocf_mngt_cache_mode_has_lazy_write(mode_old) &&
!ocf_mngt_cache_mode_has_lazy_write(mode)) {
_cache_mngt_update_initial_dirty_clines(cache);
}
ocf_cache_log(cache, log_info, "Changing cache mode from '%s' to '%s' "
"successful\n", ocf_get_io_iface_name(mode_old),

9
src/ocf_core.c
View File

@ -251,7 +251,9 @@ void ocf_core_submit_io_mode(struct ocf_io *io, ocf_cache_mode_t cache_mode)
if (cache_mode == ocf_cache_mode_none)
req_cache_mode = ocf_get_effective_cache_mode(cache, core, io);
if (req_cache_mode == ocf_req_cache_mode_wb &&
if (io->dir == OCF_WRITE &&
ocf_req_cache_mode_has_lazy_write(req_cache_mode) &&
ocf_io_set_dirty(cache, core_io)) {
req_cache_mode = ocf_req_cache_mode_wt;
}
@ -319,7 +321,9 @@ int ocf_core_submit_io_fast(struct ocf_io *io)
}
req_cache_mode = ocf_get_effective_cache_mode(cache, core, io);
if (req_cache_mode == ocf_req_cache_mode_wb &&
if (io->dir == OCF_WRITE &&
ocf_req_cache_mode_has_lazy_write(req_cache_mode) &&
ocf_io_set_dirty(cache, core_io)) {
req_cache_mode = ocf_req_cache_mode_wt;
}
@ -328,6 +332,7 @@ int ocf_core_submit_io_fast(struct ocf_io *io)
case ocf_req_cache_mode_pt:
return -OCF_ERR_IO;
case ocf_req_cache_mode_wb:
case ocf_req_cache_mode_wo:
req_cache_mode = ocf_req_cache_mode_fast;
break;
default: