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| author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-04-24 13:00:14 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-04-26 10:35:03 +0900 |
| commit | 6cb968d9b0358c7e807416a85699a526e820083c (patch) | |
| tree | 8958e38642c540ea611b37b083e77e701a780c1a /fs/f2fs | |
| parent | 2af4bd6ca556d690ee166200abd16fdbe749782e (diff) | |
| download | blackbird-op-linux-6cb968d9b0358c7e807416a85699a526e820083c.tar.gz blackbird-op-linux-6cb968d9b0358c7e807416a85699a526e820083c.zip | |
f2fs: avoid frequent background GC
If there is no victim segments selected by background GC, let's wait
a little bit longer time to collect dirty segments.
By default, let's give 5 minutes.
Reviewed-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/gc.c | 3 | ||||
| -rw-r--r-- | fs/f2fs/gc.h | 12 |
2 files changed, 9 insertions, 6 deletions
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index 1ca332455ee2..6ed3263eeee8 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -82,9 +82,6 @@ static int gc_thread_func(void *data) /* if return value is not zero, no victim was selected */ if (f2fs_gc(sbi)) wait_ms = GC_THREAD_NOGC_SLEEP_TIME; - else if (wait_ms == GC_THREAD_NOGC_SLEEP_TIME) - wait_ms = GC_THREAD_MAX_SLEEP_TIME; - } while (!kthread_should_stop()); return 0; } diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h index 30b2db003acd..2c6a6bd08322 100644 --- a/fs/f2fs/gc.h +++ b/fs/f2fs/gc.h @@ -13,9 +13,9 @@ * whether IO subsystem is idle * or not */ -#define GC_THREAD_MIN_SLEEP_TIME 10000 /* milliseconds */ -#define GC_THREAD_MAX_SLEEP_TIME 30000 -#define GC_THREAD_NOGC_SLEEP_TIME 10000 +#define GC_THREAD_MIN_SLEEP_TIME 30000 /* milliseconds */ +#define GC_THREAD_MAX_SLEEP_TIME 60000 +#define GC_THREAD_NOGC_SLEEP_TIME 300000 /* wait 5 min */ #define LIMIT_INVALID_BLOCK 40 /* percentage over total user space */ #define LIMIT_FREE_BLOCK 40 /* percentage over invalid + free space */ @@ -58,6 +58,9 @@ static inline block_t limit_free_user_blocks(struct f2fs_sb_info *sbi) static inline long increase_sleep_time(long wait) { + if (wait == GC_THREAD_NOGC_SLEEP_TIME) + return wait; + wait += GC_THREAD_MIN_SLEEP_TIME; if (wait > GC_THREAD_MAX_SLEEP_TIME) wait = GC_THREAD_MAX_SLEEP_TIME; @@ -66,6 +69,9 @@ static inline long increase_sleep_time(long wait) static inline long decrease_sleep_time(long wait) { + if (wait == GC_THREAD_NOGC_SLEEP_TIME) + wait = GC_THREAD_MAX_SLEEP_TIME; + wait -= GC_THREAD_MIN_SLEEP_TIME; if (wait <= GC_THREAD_MIN_SLEEP_TIME) wait = GC_THREAD_MIN_SLEEP_TIME; |
