With this option the user can specify the minimal number of free/dead blocks, which is a threshold for the GC. If there are less free blocks to gain from cleaning a segment than the specified number, the GC will abort and try again with a different segment.
By setting it to 0 this feature is effectively disabled. Signed-off-by: Andreas Rohner <[email protected]> --- sbin/cleanerd/cldconfig.c | 20 ++++++++++++++++++++ sbin/cleanerd/cldconfig.h | 2 ++ 2 files changed, 22 insertions(+) diff --git a/sbin/cleanerd/cldconfig.c b/sbin/cleanerd/cldconfig.c index 270d360..9a55914 100644 --- a/sbin/cleanerd/cldconfig.c +++ b/sbin/cleanerd/cldconfig.c @@ -456,6 +456,20 @@ nilfs_cldconfig_handle_mc_nsegments_per_clean(struct nilfs_cldconfig *config, } static int +nilfs_cldconfig_handle_min_free_blocks(struct nilfs_cldconfig *config, + char **tokens, size_t ntoks, + struct nilfs *nilfs) +{ + unsigned long n; + + if (nilfs_cldconfig_get_ulong_argument(tokens, ntoks, &n) < 0) + return 0; + + config->cf_min_free_blocks_for_cleaning = n; + return 0; +} + +static int nilfs_cldconfig_handle_cleaning_interval(struct nilfs_cldconfig *config, char **tokens, size_t ntoks, struct nilfs *nilfs) @@ -576,6 +590,10 @@ nilfs_cldconfig_keyword_table[] = { "log_priority", 2, 2, nilfs_cldconfig_handle_log_priority }, + { + "min_free_blocks_for_cleaning", 2, 2, + nilfs_cldconfig_handle_min_free_blocks + }, }; #define NILFS_CLDCONFIG_NKEYWORDS \ @@ -641,6 +659,8 @@ static void nilfs_cldconfig_set_default(struct nilfs_cldconfig *config, config->cf_retry_interval.tv_usec = 0; config->cf_use_mmap = NILFS_CLDCONFIG_USE_MMAP; config->cf_log_priority = NILFS_CLDCONFIG_LOG_PRIORITY; + config->cf_min_free_blocks_for_cleaning = + NILFS_CLDCONFIG_MIN_FREE_BLOCKS_FOR_CLEANING; } static inline int iseol(int c) diff --git a/sbin/cleanerd/cldconfig.h b/sbin/cleanerd/cldconfig.h index 188ce9b..71a0642 100644 --- a/sbin/cleanerd/cldconfig.h +++ b/sbin/cleanerd/cldconfig.h @@ -102,6 +102,7 @@ struct nilfs_cldconfig { struct timeval cf_retry_interval; int cf_use_mmap; int cf_log_priority; + unsigned long cf_min_free_blocks_for_cleaning; }; #define NILFS_CLDCONFIG_SELECTION_POLICY_IMPORTANCE \ @@ -120,6 +121,7 @@ struct nilfs_cldconfig { #define NILFS_CLDCONFIG_RETRY_INTERVAL 60 #define NILFS_CLDCONFIG_USE_MMAP 1 #define NILFS_CLDCONFIG_LOG_PRIORITY LOG_INFO +#define NILFS_CLDCONFIG_MIN_FREE_BLOCKS_FOR_CLEANING 128 #define NILFS_CLDCONFIG_NSEGMENTS_PER_CLEAN_MAX 32 -- 1.8.5.3 -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
