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Add option to disable cleaner

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This allows to avoid allocating cleaner metadata section and effectively
save up to 20% of metadata memory footprint.

Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>
This commit is contained in:
Robert Baldyga
2022-04-14 21:30:31 +02:00
parent 761ff2f053
commit d4df912f46
9 changed files with 65 additions and 4 deletions
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5
inc/ocf_err.h
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@@ -155,7 +155,10 @@ typedef enum {
/** Operation only allowed in standby mode **/
OCF_ERR_CACHE_NOT_STANDBY,
OCF_ERR_MAX = OCF_ERR_CACHE_NOT_STANDBY,
/** Operation not allowed when cleaner is disabled **/
OCF_ERR_CLEANER_DISABLED,
OCF_ERR_MAX = OCF_ERR_CLEANER_DISABLED,
} ocf_error_t;

16
inc/ocf_mngt.h
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@@ -424,6 +424,21 @@ struct ocf_mngt_cache_attach_config {
* @brief If set, cache device will be discarded on cache start
*/
bool discard_on_start;
/**
* @brief If set, asynchronous cleaning will be disabled
*
* Has similar effect to setting cleaning policy to NOP, but
* additionally prevents allocating "cleaning" metadata section,
* which can reduce memory footprint by up to 20%.
*
* When this option is selected, any attempt to change the cleaning
* policy will fail.
*
* @note This option is meaningful only with ocf_mngt_cache_attach().
* When used with ocf_mngt_cache_load() it's ignored.
*/
bool disable_cleaner;
};
/**
@@ -441,6 +456,7 @@ static inline void ocf_mngt_cache_attach_config_set_default(
cfg->open_cores = true;
cfg->force = false;
cfg->discard_on_start = true;
cfg->disable_cleaner = false;
cfg->device.perform_test = true;
cfg->device.volume_params = NULL;
}