diff options
Diffstat (limited to 'block/blk-core.c')
| -rw-r--r-- | block/blk-core.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index d2f8f4049abd..f9255815a5bb 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -839,6 +839,9 @@ struct request *blk_get_request(struct request_queue *q, int rw, gfp_t gfp_mask) { struct request *rq; + if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags))) + return NULL; + BUG_ON(rw != READ && rw != WRITE); spin_lock_irq(q->queue_lock); @@ -1279,10 +1282,8 @@ get_rq: init_request_from_bio(req, bio); if (test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags) || - bio_flagged(bio, BIO_CPU_AFFINE)) { - req->cpu = blk_cpu_to_group(get_cpu()); - put_cpu(); - } + bio_flagged(bio, BIO_CPU_AFFINE)) + req->cpu = raw_smp_processor_id(); plug = current->plug; if (plug) { @@ -1302,7 +1303,10 @@ get_rq: plug->should_sort = 1; } list_add_tail(&req->queuelist, &plug->list); + plug->count++; drive_stat_acct(req, 1); + if (plug->count >= BLK_MAX_REQUEST_COUNT) + blk_flush_plug_list(plug, false); } else { spin_lock_irq(q->queue_lock); add_acct_request(q, req, where); @@ -2626,6 +2630,7 @@ void blk_start_plug(struct blk_plug *plug) INIT_LIST_HEAD(&plug->list); INIT_LIST_HEAD(&plug->cb_list); plug->should_sort = 0; + plug->count = 0; /* * If this is a nested plug, don't actually assign it. It will be @@ -2709,6 +2714,7 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule) return; list_splice_init(&plug->list, &list); + plug->count = 0; if (plug->should_sort) { list_sort(NULL, &list, plug_rq_cmp); |