Messages in this thread | ![/](/images/icornerl.gif) | | From | chengming.zhou@linux ... | Subject | [PATCH v3 0/3] blk-mq: fix start_time_ns and alloc_time_ns for pre-allocated rq | Date | Wed, 28 Jun 2023 20:45:43 +0800 |
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From: Chengming Zhou <zhouchengming@bytedance.com>
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@linux.dev/
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@linux.dev/
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
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