[PATCH v2 0/3] blk-mq: fix start_time_ns and alloc_time_ns for pre-allocated rq

chengming.zhou
2023-06-26T05:06:16Z

Hello,

This patchset is the updated version of [1], which fix start_time_ns
and alloc_time_ns for pre-allocated rq.

patch 1 and 2 is preparation that we ktime_get_ns() only once 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.

[1] 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 | 89 ++++++++++++++++++++++++------------------
include/linux/blk-mq.h | 6 +--
2 files changed, 55 insertions(+), 40 deletions(-)

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2.39.2