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path: root/drivers/lightnvm/pblk-rl.c
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Diffstat (limited to 'drivers/lightnvm/pblk-rl.c')
-rw-r--r--drivers/lightnvm/pblk-rl.c43
1 files changed, 12 insertions, 31 deletions
diff --git a/drivers/lightnvm/pblk-rl.c b/drivers/lightnvm/pblk-rl.c
index 2e6a5361baf0..abae31fd434e 100644
--- a/drivers/lightnvm/pblk-rl.c
+++ b/drivers/lightnvm/pblk-rl.c
@@ -96,9 +96,11 @@ unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl)
*
* Only the total number of free blocks is used to configure the rate limiter.
*/
-static int pblk_rl_update_rates(struct pblk_rl *rl, unsigned long max)
+void pblk_rl_update_rates(struct pblk_rl *rl)
{
+ struct pblk *pblk = container_of(rl, struct pblk, rl);
unsigned long free_blocks = pblk_rl_nr_free_blks(rl);
+ int max = rl->rb_budget;
if (free_blocks >= rl->high) {
rl->rb_user_max = max;
@@ -124,23 +126,18 @@ static int pblk_rl_update_rates(struct pblk_rl *rl, unsigned long max)
rl->rb_state = PBLK_RL_LOW;
}
- return rl->rb_state;
+ if (rl->rb_state == (PBLK_RL_MID | PBLK_RL_LOW))
+ pblk_gc_should_start(pblk);
+ else
+ pblk_gc_should_stop(pblk);
}
void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line)
{
- struct pblk *pblk = container_of(rl, struct pblk, rl);
int blk_in_line = atomic_read(&line->blk_in_line);
- int ret;
atomic_add(blk_in_line, &rl->free_blocks);
- /* Rates will not change that often - no need to lock update */
- ret = pblk_rl_update_rates(rl, rl->rb_budget);
-
- if (ret == (PBLK_RL_MID | PBLK_RL_LOW))
- pblk_gc_should_start(pblk);
- else
- pblk_gc_should_stop(pblk);
+ pblk_rl_update_rates(rl);
}
void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line)
@@ -148,19 +145,7 @@ void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line)
int blk_in_line = atomic_read(&line->blk_in_line);
atomic_sub(blk_in_line, &rl->free_blocks);
-}
-
-void pblk_gc_should_kick(struct pblk *pblk)
-{
- struct pblk_rl *rl = &pblk->rl;
- int ret;
-
- /* Rates will not change that often - no need to lock update */
- ret = pblk_rl_update_rates(rl, rl->rb_budget);
- if (ret == (PBLK_RL_MID | PBLK_RL_LOW))
- pblk_gc_should_start(pblk);
- else
- pblk_gc_should_stop(pblk);
+ pblk_rl_update_rates(rl);
}
int pblk_rl_high_thrs(struct pblk_rl *rl)
@@ -168,14 +153,9 @@ int pblk_rl_high_thrs(struct pblk_rl *rl)
return rl->high;
}
-int pblk_rl_low_thrs(struct pblk_rl *rl)
-{
- return rl->low;
-}
-
-int pblk_rl_sysfs_rate_show(struct pblk_rl *rl)
+int pblk_rl_max_io(struct pblk_rl *rl)
{
- return rl->rb_user_max;
+ return rl->rb_max_io;
}
static void pblk_rl_u_timer(unsigned long data)
@@ -214,6 +194,7 @@ void pblk_rl_init(struct pblk_rl *rl, int budget)
/* To start with, all buffer is available to user I/O writers */
rl->rb_budget = budget;
rl->rb_user_max = budget;
+ rl->rb_max_io = budget >> 1;
rl->rb_gc_max = 0;
rl->rb_state = PBLK_RL_HIGH;