@@ -213,6 +213,7 @@ static const char *const hctx_state_name[] = {
HCTX_STATE_NAME(STOPPED),
HCTX_STATE_NAME(TAG_ACTIVE),
HCTX_STATE_NAME(SCHED_RESTART),
+ HCTX_STATE_NAME(INACTIVE),
};
#undef HCTX_STATE_NAME
@@ -167,7 +167,8 @@ static inline struct blk_mq_tags *blk_mq_tags_from_data(struct blk_mq_alloc_data
static inline bool blk_mq_hctx_stopped(struct blk_mq_hw_ctx *hctx)
{
- return test_bit(BLK_MQ_S_STOPPED, &hctx->state);
+ return test_bit(BLK_MQ_S_STOPPED, &hctx->state) ||
+ test_bit(BLK_MQ_S_INACTIVE, &hctx->state);
}
static inline bool blk_mq_hw_queue_mapped(struct blk_mq_hw_ctx *hctx)
@@ -397,6 +397,9 @@ enum {
BLK_MQ_S_TAG_ACTIVE = 1,
BLK_MQ_S_SCHED_RESTART = 2,
+ /* hw queue is inactive after all its CPUs become offline */
+ BLK_MQ_S_INACTIVE = 3,
+
BLK_MQ_MAX_DEPTH = 10240,
BLK_MQ_CPU_WORK_BATCH = 8,
Add a new hw queue state of BLK_MQ_S_INACTIVE, which is set when all CPUs of this hctx are offline. Prepares for stopping hw queue when all CPUs of this hctx become offline. Cc: Bart Van Assche <bvanassche@acm.org> Cc: Hannes Reinecke <hare@suse.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Keith Busch <keith.busch@intel.com> Cc: John Garry <john.garry@huawei.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> --- block/blk-mq-debugfs.c | 1 + block/blk-mq.h | 3 ++- include/linux/blk-mq.h | 3 +++ 3 files changed, 6 insertions(+), 1 deletion(-)