diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-mq.c | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index d79fdc11b1ee..4bf850e8d6b5 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1605,7 +1605,7 @@ static struct blk_mq_tags *blk_mq_init_rq_map(struct blk_mq_tag_set *set, INIT_LIST_HEAD(&tags->page_list); tags->rqs = kzalloc_node(set->queue_depth * sizeof(struct request *), - GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY, + GFP_NOIO | __GFP_NOWARN | __GFP_NORETRY, set->numa_node); if (!tags->rqs) { blk_mq_free_tags(tags); @@ -1631,7 +1631,7 @@ static struct blk_mq_tags *blk_mq_init_rq_map(struct blk_mq_tag_set *set, do { page = alloc_pages_node(set->numa_node, - GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY | __GFP_ZERO, + GFP_NOIO | __GFP_NOWARN | __GFP_NORETRY | __GFP_ZERO, this_order); if (page) break; @@ -1652,7 +1652,7 @@ static struct blk_mq_tags *blk_mq_init_rq_map(struct blk_mq_tag_set *set, * Allow kmemleak to scan these pages as they contain pointers * to additional allocations like via ops->init_request(). */ - kmemleak_alloc(p, order_to_size(this_order), 1, GFP_KERNEL); + kmemleak_alloc(p, order_to_size(this_order), 1, GFP_NOIO); entries_per_page = order_to_size(this_order) / rq_size; to_do = min(entries_per_page, set->queue_depth - i); left -= to_do * rq_size; @@ -1870,7 +1870,7 @@ static void blk_mq_init_cpu_queues(struct request_queue *q, static void blk_mq_map_swqueue(struct request_queue *q, const struct cpumask *online_mask) { - unsigned int i; + unsigned int i, hctx_idx; struct blk_mq_hw_ctx *hctx; struct blk_mq_ctx *ctx; struct blk_mq_tag_set *set = q->tag_set; @@ -1893,6 +1893,21 @@ static void blk_mq_map_swqueue(struct request_queue *q, if (!cpumask_test_cpu(i, online_mask)) continue; + hctx_idx = q->mq_map[i]; + /* unmapped hw queue can be remapped after CPU topo changed */ + if (!set->tags[hctx_idx]) { + set->tags[hctx_idx] = blk_mq_init_rq_map(set, hctx_idx); + + /* + * If tags initialization fail for some hctx, + * that hctx won't be brought online. In this + * case, remap the current ctx to hctx[0] which + * is guaranteed to always have tags allocated + */ + if (!set->tags[hctx_idx]) + q->mq_map[i] = 0; + } + ctx = per_cpu_ptr(q->queue_ctx, i); hctx = blk_mq_map_queue(q, i); @@ -1909,7 +1924,11 @@ static void blk_mq_map_swqueue(struct request_queue *q, * disable it and free the request entries. */ if (!hctx->nr_ctx) { - if (set->tags[i]) { + /* Never unmap queue 0. We need it as a + * fallback in case of a new remap fails + * allocation + */ + if (i && set->tags[i]) { blk_mq_free_rq_map(set, set->tags[i], i); set->tags[i] = NULL; } @@ -1917,9 +1936,6 @@ static void blk_mq_map_swqueue(struct request_queue *q, continue; } - /* unmapped hw queue can be remapped after CPU topo changed */ - if (!set->tags[i]) - set->tags[i] = blk_mq_init_rq_map(set, i); hctx->tags = set->tags[i]; WARN_ON(!hctx->tags); |