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 <andreas.rohner@xxxxxxx>
---
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
--
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