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| author | Namjae Jeon <namjae.jeon@samsung.com> | 2013-08-04 23:09:40 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-08-06 21:53:34 +0900 |
| commit | b59d0bae6ca30c496f298881616258f9cde0d9c6 (patch) | |
| tree | 04c6a23cfed2ef045a56ca090cbfd510ca3e5e5e /fs/f2fs/gc.h | |
| parent | f0c5e565bb05a4cd6105bb197c56078462252e78 (diff) | |
| download | linux-stable-b59d0bae6ca30c496f298881616258f9cde0d9c6.tar.gz linux-stable-b59d0bae6ca30c496f298881616258f9cde0d9c6.tar.bz2 linux-stable-b59d0bae6ca30c496f298881616258f9cde0d9c6.zip | |
f2fs: add sysfs support for controlling the gc_thread
Add sysfs entries to control the timing parameters for
f2fs gc thread.
Various Sysfs options introduced are:
gc_min_sleep_time: Min Sleep time for GC in ms
gc_max_sleep_time: Max Sleep time for GC in ms
gc_no_gc_sleep_time: Default Sleep time for GC in ms
Cc: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Pankaj Kumar <pankaj.km@samsung.com>
Reviewed-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
[Jaegeuk Kim: fix an umount bug and some minor changes]
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/gc.h')
| -rw-r--r-- | fs/f2fs/gc.h | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h index 2c6a6bd08322..f4bf44c9deda 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 30000 /* milliseconds */ -#define GC_THREAD_MAX_SLEEP_TIME 60000 -#define GC_THREAD_NOGC_SLEEP_TIME 300000 /* wait 5 min */ +#define DEF_GC_THREAD_MIN_SLEEP_TIME 30000 /* milliseconds */ +#define DEF_GC_THREAD_MAX_SLEEP_TIME 60000 +#define DEF_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 */ @@ -25,6 +25,11 @@ struct f2fs_gc_kthread { struct task_struct *f2fs_gc_task; wait_queue_head_t gc_wait_queue_head; + + /* for gc sleep time */ + unsigned int min_sleep_time; + unsigned int max_sleep_time; + unsigned int no_gc_sleep_time; }; struct inode_entry { @@ -56,25 +61,25 @@ static inline block_t limit_free_user_blocks(struct f2fs_sb_info *sbi) return (long)(reclaimable_user_blocks * LIMIT_FREE_BLOCK) / 100; } -static inline long increase_sleep_time(long wait) +static inline long increase_sleep_time(struct f2fs_gc_kthread *gc_th, long wait) { - if (wait == GC_THREAD_NOGC_SLEEP_TIME) + if (wait == gc_th->no_gc_sleep_time) return wait; - wait += GC_THREAD_MIN_SLEEP_TIME; - if (wait > GC_THREAD_MAX_SLEEP_TIME) - wait = GC_THREAD_MAX_SLEEP_TIME; + wait += gc_th->min_sleep_time; + if (wait > gc_th->max_sleep_time) + wait = gc_th->max_sleep_time; return wait; } -static inline long decrease_sleep_time(long wait) +static inline long decrease_sleep_time(struct f2fs_gc_kthread *gc_th, long wait) { - if (wait == GC_THREAD_NOGC_SLEEP_TIME) - wait = GC_THREAD_MAX_SLEEP_TIME; + if (wait == gc_th->no_gc_sleep_time) + wait = gc_th->max_sleep_time; - wait -= GC_THREAD_MIN_SLEEP_TIME; - if (wait <= GC_THREAD_MIN_SLEEP_TIME) - wait = GC_THREAD_MIN_SLEEP_TIME; + wait -= gc_th->min_sleep_time; + if (wait <= gc_th->min_sleep_time) + wait = gc_th->min_sleep_time; return wait; } |