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block: move the remaining elv.icq handling to the I/O scheduler 

After the prepare side has been moved to the only I/O scheduler that
cares, do the same for the cleanup and the NULL initialization.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211126115817.2087431-9-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-11-26 12:58:11 +01:00 committed by Jens Axboe
parent 87dd1d63dc
commit 222ee581b8
3 changed files with 15 additions and 12 deletions
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12
block/bfq-iosched.c
View File

@ -6569,6 +6569,16 @@ static void bfq_finish_requeue_request(struct request *rq)
rq->elv.priv[1] = NULL;
}
static void bfq_finish_request(struct request *rq)
{
bfq_finish_requeue_request(rq);
if (rq->elv.icq) {
put_io_context(rq->elv.icq->ioc);
rq->elv.icq = NULL;
}
}
/*
* Removes the association between the current task and bfqq, assuming
* that bic points to the bfq iocontext of the task.
@ -7388,7 +7398,7 @@ static struct elevator_type iosched_bfq_mq = {
.limit_depth = bfq_limit_depth,
.prepare_request = bfq_prepare_request,
.requeue_request = bfq_finish_requeue_request,
.finish_request = bfq_finish_requeue_request,
.finish_request = bfq_finish_request,
.exit_icq = bfq_exit_icq,
.insert_requests = bfq_insert_requests,
.dispatch_request = bfq_dispatch_request,

1
block/blk-ioc.c
View File

@ -167,6 +167,7 @@ void put_io_context(struct io_context *ioc)
if (free_ioc)
kmem_cache_free(iocontext_cachep, ioc);
}
EXPORT_SYMBOL_GPL(put_io_context);
/**
* put_io_context_active - put active reference on ioc

14
block/blk-mq.c
View File

@ -400,7 +400,6 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data,
if (rq->rq_flags & RQF_ELV) {
struct elevator_queue *e = data->q->elevator;
rq->elv.icq = NULL;
INIT_HLIST_NODE(&rq->hash);
RB_CLEAR_NODE(&rq->rb_node);
@ -631,16 +630,9 @@ void blk_mq_free_request(struct request *rq)
struct request_queue *q = rq->q;
struct blk_mq_hw_ctx *hctx = rq->mq_hctx;
if (rq->rq_flags & RQF_ELVPRIV) {
struct elevator_queue *e = q->elevator;
if (e->type->ops.finish_request)
e->type->ops.finish_request(rq);
if (rq->elv.icq) {
put_io_context(rq->elv.icq->ioc);
rq->elv.icq = NULL;
}
}
if ((rq->rq_flags & RQF_ELVPRIV) &&
q->elevator->type->ops.finish_request)
q->elevator->type->ops.finish_request(rq);
if (rq->rq_flags & RQF_MQ_INFLIGHT)
__blk_mq_dec_active_requests(hctx);