AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

block: collapse blk_alloc_request() into get_request()

Browse Source 
Allocation failure handling in get_request() is about to be updated.
To ease the update, collapse blk_alloc_request() into get_request().

This patch doesn't introduce any functional change.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Tejun Heo 2012-04-19 16:29:21 -07:00 committed by Jens Axboe
parent f9fcc2d391
commit 29e2b09ab5
1 changed files with 17 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
block/blk-core.c
View File

@ -719,33 +719,6 @@ static inline void blk_free_request(struct request_queue *q, struct request *rq)
mempool_free(rq, q->rq.rq_pool); mempool_free(rq, q->rq.rq_pool);
} }
static struct request *
blk_alloc_request(struct request_queue *q, struct bio *bio, struct io_cq *icq,
unsigned int flags, gfp_t gfp_mask)
{
struct request *rq = mempool_alloc(q->rq.rq_pool, gfp_mask);
if (!rq)
return NULL;
blk_rq_init(q, rq);
rq->cmd_flags = flags | REQ_ALLOCED;
if (flags & REQ_ELVPRIV) {
rq->elv.icq = icq;
if (unlikely(elv_set_request(q, rq, bio, gfp_mask))) {
mempool_free(rq, q->rq.rq_pool);
return NULL;
}
/* @rq->elv.icq holds on to io_context until @rq is freed */
if (icq)
get_io_context(icq->ioc);
}
return rq;
}
/* /*
* ioc_batching returns true if the ioc is a valid batching request and * ioc_batching returns true if the ioc is a valid batching request and
* should be given priority access to a request. * should be given priority access to a request.
@ -968,10 +941,25 @@ static struct request *get_request(struct request_queue *q, int rw_flags,
goto fail_alloc; goto fail_alloc;
} }
rq = blk_alloc_request(q, bio, icq, rw_flags, gfp_mask); /* allocate and init request */
if (unlikely(!rq)) rq = mempool_alloc(q->rq.rq_pool, gfp_mask);
if (!rq)
goto fail_alloc; goto fail_alloc;
blk_rq_init(q, rq);
rq->cmd_flags = rw_flags | REQ_ALLOCED;
if (rw_flags & REQ_ELVPRIV) {
rq->elv.icq = icq;
if (unlikely(elv_set_request(q, rq, bio, gfp_mask))) {
mempool_free(rq, q->rq.rq_pool);
goto fail_alloc;
}
/* @rq->elv.icq holds on to io_context until @rq is freed */
if (icq)
get_io_context(icq->ioc);
}
/* /*
* ioc may be NULL here, and ioc_batching will be false. That's * ioc may be NULL here, and ioc_batching will be false. That's
* OK, if the queue is under the request limit then requests need * OK, if the queue is under the request limit then requests need