大神教你零基础学PS,30堂课从入门到精通2018年3月4.2G

Pythonmm · 发表于 2021-7-4 14:26:27

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陌上冷时光 · 发表于 2021-11-1 18:49:14

学习学习

ustc · 发表于 2021-11-25 11:03:55

static blk_qc_t blk_queue_bio(struct request_queue *q, struct bio *bio)
{
struct request *req, *free;
unsigned int request_count = 0;
......
switch (elv_merge(q, &req, bio)) {
case ELEVATOR_BACK_MERGE:
if (!bio_attempt_back_merge(q, req, bio))
break;
elv_bio_merged(q, req, bio);
free = attempt_back_merge(q, req);
if (free)
__blk_put_request(q, free);
else
elv_merged_request(q, req, ELEVATOR_BACK_MERGE);
goto out_unlock;
case ELEVATOR_FRONT_MERGE:
if (!bio_attempt_front_merge(q, req, bio))
break;
elv_bio_merged(q, req, bio);
free = attempt_front_merge(q, req);
if (free)
__blk_put_request(q, free);
else
elv_merged_request(q, req, ELEVATOR_FRONT_MERGE);
goto out_unlock;
default:
break;
}

get_rq:
req = get_request(q, bio->bi_opf, bio, GFP_NOIO);
......
blk_init_request_from_bio(req, bio);
......
add_acct_request(q, req, where);
__blk_run_queue(q);
out_unlock:
......
return BLK_QC_T_NONE;
}

[photoshop] 大神教你零基础学PS,30堂课从入门到精通2018年3月4.2G