diff options
| -rw-r--r-- | block/blk-mq.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index 3b277b4eaa9..c5345a95182 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -20,6 +20,7 @@ #include <linux/cache.h> #include <linux/sched/sysctl.h> #include <linux/delay.h> +#include <linux/crash_dump.h> #include <trace/events/block.h> @@ -1742,6 +1743,16 @@ struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set) if (!ctx) return ERR_PTR(-ENOMEM); + /* + * If a crashdump is active, then we are potentially in a very + * memory constrained environment. Limit us to 1 queue and + * 64 tags to prevent using too much memory. + */ + if (is_kdump_kernel()) { + set->nr_hw_queues = 1; + set->queue_depth = min(64U, set->queue_depth); + } + hctxs = kmalloc_node(set->nr_hw_queues * sizeof(*hctxs), GFP_KERNEL, set->numa_node); |