[PATCH v3 08/14] bfq: introduce prio_expire flag for bfq_queue
From: brookxu <hidden>
Date: 2021-03-25 06:59:21
Also in:
cgroups, lkml
Subsystem:
bfq i/o scheduler, block layer, the rest · Maintainers:
Yu Kuai, Jens Axboe, Linus Torvalds
From: Chunguang Xu <redacted> When in_service_queue needs to be preempted by task with a higher priority, we will mark it with prio_expire flag, and then expire it on the IO dispatch path. Here add prio_expire flag only. Signed-off-by: Chunguang Xu <redacted> --- block/bfq-iosched.c | 2 ++ block/bfq-iosched.h | 2 ++ 2 files changed, 4 insertions(+)
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index e7bc5e2..6e19b5a 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c@@ -153,6 +153,7 @@ BFQ_BFQQ_FNS(wait_request); BFQ_BFQQ_FNS(non_blocking_wait_rq); BFQ_BFQQ_FNS(fifo_expire); +BFQ_BFQQ_FNS(prio_expire); BFQ_BFQQ_FNS(has_short_ttime); BFQ_BFQQ_FNS(sync); BFQ_BFQQ_FNS(IO_bound);
@@ -2986,6 +2987,7 @@ static void __bfq_set_in_service_queue(struct bfq_data *bfqd, { if (bfqq) { bfq_clear_bfqq_fifo_expire(bfqq); + bfq_clear_bfqq_prio_expire(bfqq); bfqd->budgets_assigned = (bfqd->budgets_assigned * 7 + 256) / 8;
diff --git a/block/bfq-iosched.h b/block/bfq-iosched.h
index 674de8b..8af5ac0 100644
--- a/block/bfq-iosched.h
+++ b/block/bfq-iosched.h@@ -777,6 +777,7 @@ enum bfqq_state_flags { * without idling the device */ BFQQF_fifo_expire, /* FIFO checked in this slice */ + BFQQF_prio_expire, /* should expire for higher prio queue*/ BFQQF_has_short_ttime, /* queue has a short think time */ BFQQF_sync, /* synchronous queue */ BFQQF_IO_bound, /*
@@ -806,6 +807,7 @@ enum bfqq_state_flags { BFQ_BFQQ_FNS(wait_request); BFQ_BFQQ_FNS(non_blocking_wait_rq); BFQ_BFQQ_FNS(fifo_expire); +BFQ_BFQQ_FNS(prio_expire); BFQ_BFQQ_FNS(has_short_ttime); BFQ_BFQQ_FNS(sync); BFQ_BFQQ_FNS(IO_bound);
--
1.8.3.1