| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <39aef23b-877d-e49c-78ad-4b028aefc8cf@gmail.com>
Date: Thu, 10 Nov 2022 18:54:30 +0800
From: Yuwei Guan <ssawgyw@...il.com>
To: Yu Kuai <yukuai1@...weicloud.com>, paolo.valente@...aro.org,
axboe@...nel.dk
Cc: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
Yuwei.Guan@...krlife.com, "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH] block, bfq: do the all counting of pending-request if
CONFIG_BFQ_GROUP_IOSCHED is enabled
On 2022/11/10 17:28, Yu Kuai wrote:
> Hi,
>
> 在 2022/11/09 21:29, Yuwei Guan 写道:
>> The 'bfqd->num_groups_with_pending_reqs' is used when
>> CONFIG_BFQ_GROUP_IOSCHED is enabled, so let the variables and processes
>> take effect when ONFIG_BFQ_GROUP_IOSCHED is enabled.
>>
>> Cc: Yu Kuai <yukuai3@...wei.com>
>> Signed-off-by: Yuwei Guan <Yuwei.Guan@...krlife.com>
>> ---
>> block/bfq-iosched.c | 5 ++++-
>> block/bfq-iosched.h | 6 ++++++
>> block/bfq-wf2q.c | 10 ++++++----
>> 3 files changed, 16 insertions(+), 5 deletions(-)
>>
>> diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
>> index 2381cf220ba2..5a648433fd89 100644
>> --- a/block/bfq-iosched.c
>> +++ b/block/bfq-iosched.c
>> @@ -6192,8 +6192,9 @@ static void bfq_completed_request(struct
>> bfq_queue *bfqq, struct bfq_data *bfqd)
>> * mechanism).
>> */
>> bfqq->budget_timeout = jiffies;
>> -
>> +#ifdef CONFIG_BFQ_GROUP_IOSCHED
>> bfq_del_bfqq_in_groups_with_pending_reqs(bfqq);
>> +#endif
>> bfq_weights_tree_remove(bfqq);
>> }
>
> Thanks for the patch, this make sense. However, I prefer to
> declare a empty function if the config is disabled instead of adding
> "#ifdef" everywhere the function is called.
Thanks a lot for reviewing. Get it, I will send v1 soon.
>
> Thanks,
> Kuai
>> @@ -7051,7 +7052,9 @@ static int bfq_init_queue(struct
>> request_queue *q, struct elevator_type *e)
>> bfqd->idle_slice_timer.function = bfq_idle_slice_timer;
>> bfqd->queue_weights_tree = RB_ROOT_CACHED;
>> +#ifdef CONFIG_BFQ_GROUP_IOSCHED
>> bfqd->num_groups_with_pending_reqs = 0;
>> +#endif
>> INIT_LIST_HEAD(&bfqd->active_list);
>> INIT_LIST_HEAD(&bfqd->idle_list);
>> diff --git a/block/bfq-iosched.h b/block/bfq-iosched.h
>> index 9fa89577322d..d6b9fad28a3b 100644
>> --- a/block/bfq-iosched.h
>> +++ b/block/bfq-iosched.h
>> @@ -197,8 +197,10 @@ struct bfq_entity {
>> /* flag, set to request a weight, ioprio or ioprio_class
>> change */
>> int prio_changed;
>> +#ifdef CONFIG_BFQ_GROUP_IOSCHED
>> /* flag, set if the entity is counted in
>> groups_with_pending_reqs */
>> bool in_groups_with_pending_reqs;
>> +#endif
>> /* last child queue of entity created (for non-leaf entities) */
>> struct bfq_queue *last_bfqq_created;
>> @@ -491,6 +493,7 @@ struct bfq_data {
>> */
>> struct rb_root_cached queue_weights_tree;
>> +#ifdef CONFIG_BFQ_GROUP_IOSCHED
>> /*
>> * Number of groups with at least one process that
>> * has at least one request waiting for completion. Note that
>> @@ -538,6 +541,7 @@ struct bfq_data {
>> * with no request waiting for completion.
>> */
>> unsigned int num_groups_with_pending_reqs;
>> +#endif
>> /*
>> * Per-class (RT, BE, IDLE) number of bfq_queues containing
>> @@ -1074,8 +1078,10 @@ void bfq_requeue_bfqq(struct bfq_data *bfqd,
>> struct bfq_queue *bfqq,
>> bool expiration);
>> void bfq_del_bfqq_busy(struct bfq_queue *bfqq, bool expiration);
>> void bfq_add_bfqq_busy(struct bfq_queue *bfqq);
>> +#ifdef CONFIG_BFQ_GROUP_IOSCHED
>> void bfq_add_bfqq_in_groups_with_pending_reqs(struct bfq_queue *bfqq);
>> void bfq_del_bfqq_in_groups_with_pending_reqs(struct bfq_queue *bfqq);
>> +#endif
>> /* --------------- end of interface of B-WF2Q+ ---------------- */
>> diff --git a/block/bfq-wf2q.c b/block/bfq-wf2q.c
>> index b02b53658ed4..a29187ecdc39 100644
>> --- a/block/bfq-wf2q.c
>> +++ b/block/bfq-wf2q.c
>> @@ -1610,16 +1610,15 @@ void bfq_requeue_bfqq(struct bfq_data *bfqd,
>> struct bfq_queue *bfqq,
>> bfqq == bfqd->in_service_queue, expiration);
>> }
>> +#ifdef CONFIG_BFQ_GROUP_IOSCHED
>> void bfq_add_bfqq_in_groups_with_pending_reqs(struct bfq_queue *bfqq)
>> {
>> struct bfq_entity *entity = &bfqq->entity;
>> if (!entity->in_groups_with_pending_reqs) {
>> entity->in_groups_with_pending_reqs = true;
>> -#ifdef CONFIG_BFQ_GROUP_IOSCHED
>> if (!(bfqq_group(bfqq)->num_queues_with_pending_reqs++))
>> bfqq->bfqd->num_groups_with_pending_reqs++;
>> -#endif
>> }
>> }
>> @@ -1629,12 +1628,11 @@ void
>> bfq_del_bfqq_in_groups_with_pending_reqs(struct bfq_queue *bfqq)
>> if (entity->in_groups_with_pending_reqs) {
>> entity->in_groups_with_pending_reqs = false;
>> -#ifdef CONFIG_BFQ_GROUP_IOSCHED
>> if (!(--bfqq_group(bfqq)->num_queues_with_pending_reqs))
>> bfqq->bfqd->num_groups_with_pending_reqs--;
>> -#endif
>> }
>> }
>> +#endif
>> /*
>> * Called when the bfqq no longer has requests pending, remove it from
>> @@ -1659,7 +1657,9 @@ void bfq_del_bfqq_busy(struct bfq_queue *bfqq,
>> bool expiration)
>> bfq_deactivate_bfqq(bfqd, bfqq, true, expiration);
>> if (!bfqq->dispatched) {
>> +#ifdef CONFIG_BFQ_GROUP_IOSCHED
>> bfq_del_bfqq_in_groups_with_pending_reqs(bfqq);
>> +#endif
>> /*
>> * Next function is invoked last, because it causes bfqq to be
>> * freed. DO NOT use bfqq after the next function invocation.
>> @@ -1683,7 +1683,9 @@ void bfq_add_bfqq_busy(struct bfq_queue *bfqq)
>> bfqd->busy_queues[bfqq->ioprio_class - 1]++;
>> if (!bfqq->dispatched) {
>> +#ifdef CONFIG_BFQ_GROUP_IOSCHED
>> bfq_add_bfqq_in_groups_with_pending_reqs(bfqq);
>> +#endif
>> if (bfqq->wr_coeff == 1)
>> bfq_weights_tree_add(bfqq);
>> }
>>
>
Powered by blists - more mailing lists