From: Jeffle Xu <[email protected]>
To: [email protected], [email protected]
Cc: [email protected], [email protected], [email protected],
[email protected], [email protected],
[email protected], [email protected]
Subject: [PATCH v4 07/12] blk-mq: add one helper function getting hw queue
Date: Sat, 20 Feb 2021 19:06:32 +0800 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
Add one helper function getting hw queue mapping to specific CPU, and of
specific type.
Signed-off-by: Jeffle Xu <[email protected]>
---
block/blk-mq.c | 10 ++++++++++
include/linux/blk-mq.h | 2 ++
2 files changed, 12 insertions(+)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index b4de2b37b826..734aa1338b69 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3876,6 +3876,16 @@ unsigned int blk_mq_rq_cpu(struct request *rq)
}
EXPORT_SYMBOL(blk_mq_rq_cpu);
+
+struct blk_mq_hw_ctx *blk_mq_get_hctx(struct request_queue *q, int cpu,
+ unsigned int flags)
+{
+ struct blk_mq_ctx *ctx = __blk_mq_get_ctx(q, cpu);
+
+ return blk_mq_map_queue(q, flags, ctx);
+}
+EXPORT_SYMBOL(blk_mq_get_hctx);
+
static int __init blk_mq_init(void)
{
int i;
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 0c511555ec16..9b6a5c1fcb2d 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -630,5 +630,7 @@ blk_qc_t blk_mq_submit_bio(struct bio *bio);
int blk_mq_poll(struct request_queue *q, blk_qc_t cookie, bool spin);
void blk_mq_hctx_set_fq_lock_class(struct blk_mq_hw_ctx *hctx,
struct lock_class_key *key);
+struct blk_mq_hw_ctx *blk_mq_get_hctx(struct request_queue *q, int cpu,
+ unsigned int flags);
#endif
--
2.27.0
next prev parent reply other threads:[~2021-02-20 11:07 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-20 11:06 [PATCH v4 00/12] dm: support IO polling Jeffle Xu
2021-02-20 11:06 ` [PATCH v4 01/12] block: move definition of blk_qc_t to types.h Jeffle Xu
2021-02-20 11:06 ` [PATCH v4 02/12] block: add queue_to_disk() to get gendisk from request_queue Jeffle Xu
2021-02-20 11:06 ` [PATCH v4 03/12] block: add poll method to support bio-based IO polling Jeffle Xu
2021-02-20 11:06 ` [PATCH v4 04/12] block: add poll_capable " Jeffle Xu
2021-02-20 11:06 ` [PATCH v4 05/12] blk-mq: extract one helper function polling hw queue Jeffle Xu
2021-02-20 11:06 ` [PATCH v4 06/12] blk-mq: add iterator for polling hw queues Jeffle Xu
2021-02-20 11:06 ` Jeffle Xu [this message]
2021-02-20 11:06 ` [PATCH v4 08/12] dm: always return BLK_QC_T_NONE for bio-based device Jeffle Xu
2021-02-20 11:06 ` [PATCH v4 09/12] nvme/pci: don't wait for locked polling queue Jeffle Xu
2021-02-20 11:06 ` [PATCH v4 10/12] block: fastpath for bio-based polling Jeffle Xu
2021-02-20 11:06 ` [PATCH v4 11/12] block: sub-fastpath " Jeffle Xu
2021-02-20 11:06 ` [PATCH v4 12/12] dm: support IO polling for bio-based dm device Jeffle Xu
2021-02-23 3:55 ` [PATCH v4 00/12] dm: support IO polling JeffleXu
2021-02-23 20:54 ` Mike Snitzer
2021-02-24 1:44 ` JeffleXu
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