diff options
| author | Jens Axboe <axboe@fb.com> | 2016-12-02 20:02:34 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-12-02 20:03:49 -0700 |
| commit | 4fecac67537b6e977d4149434a8f0b05a0db6b59 (patch) | |
| tree | 58361eb481d1713c9b5bffd19102c2ac48d6e1fe | |
| parent | 52940a73b74a8ad35190e7444f2838726e5c8e71 (diff) | |
null_blk: add parameters to ask for mq-sched and write cache
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | drivers/block/null_blk.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c index 4943ee22716e..f2726936cd1a 100644 --- a/drivers/block/null_blk.c +++ b/drivers/block/null_blk.c @@ -117,6 +117,14 @@ static bool use_lightnvm; module_param(use_lightnvm, bool, S_IRUGO); MODULE_PARM_DESC(use_lightnvm, "Register as a LightNVM device"); +static bool use_sched; +module_param(use_sched, bool, S_IRUGO); +MODULE_PARM_DESC(use_sched, "Ask for blk-mq scheduling"); + +static bool wc; +module_param(wc, bool, S_IRUGO); +MODULE_PARM_DESC(use_sched, "Claim volatile write cache"); + static int irqmode = NULL_IRQ_SOFTIRQ; static int null_set_irqmode(const char *str, const struct kernel_param *kp) @@ -724,6 +732,9 @@ static int null_add_dev(void) nullb->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; nullb->tag_set.driver_data = nullb; + if (use_sched) + nullb->tag_set.flags |= BLK_MQ_F_SQ_SCHED; + rv = blk_mq_alloc_tag_set(&nullb->tag_set); if (rv) goto out_cleanup_queues; @@ -760,6 +771,9 @@ static int null_add_dev(void) queue_flag_set_unlocked(QUEUE_FLAG_NONROT, nullb->q); queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, nullb->q); + if (wc) + blk_queue_write_cache(nullb->q, true, false); + mutex_lock(&lock); nullb->index = nullb_indexes++; mutex_unlock(&lock); |