From: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx> Hello, This patchset fix start_time_ns and alloc_time_ns for pre-allocated rq. patch 1 and 2 is preparation that we ktime_get_ns() outside batched rq init for batched requests start_time_ns setting. patch 3 is the fix patch that we set alloc_time_ns and start_time_ns to now when the pre-allocated rq is actually used. v3: - Skip setting the alloc_time_ns and start_time_ns during pre-allocation, which is clearer, as suggested by Tejun. - [v2] https://lore.kernel.org/all/20230626050405.781253-1-chengming.zhou@xxxxxxxxx/ v2: - Let blk_mq_rq_ctx_init() receive start_time_ns for batched time setting. - Set alloc_time_ns and start_time_ns when the pre-allocated rq is actually used, as suggested by Tejun. - [v1] https://lore.kernel.org/all/20230601053919.3639954-1-chengming.zhou@xxxxxxxxx/ Chengming Zhou (3): blk-mq: always use __blk_mq_alloc_requests() to alloc and init rq blk-mq: ktime_get_ns() only once for batched requests init blk-mq: fix start_time_ns and alloc_time_ns for pre-allocated rq block/blk-mq.c | 94 ++++++++++++++++++++++++------------------ include/linux/blk-mq.h | 6 +-- 2 files changed, 56 insertions(+), 44 deletions(-) -- 2.39.2
