From: Changheun Lee <nanich.lee@samsung.com>
To: damien.lemoal@wdc.com, bvanassche@acm.org,
Johannes.Thumshirn@wdc.com, asml.silence@gmail.com,
axboe@kernel.dk, gregkh@linuxfoundation.org, hch@infradead.org,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
ming.lei@redhat.com, osandov@fb.com, patchwork-bot@kernel.org,
tj@kernel.org, tom.leiming@gmail.com
Cc: jisoo2146.oh@samsung.com, junho89.kim@samsung.com,
mj0123.lee@samsung.com, seunghwan.hyun@samsung.com,
sookwan7.kim@samsung.com, woosung2.lee@samsung.com,
yt0928.kim@samsung.com, Changheun Lee <nanich.lee@samsung.com>
Subject: [PATCH v7 3/3] bio: add limit_bio_size sysfs
Date: Tue, 13 Apr 2021 11:55:02 +0900 [thread overview]
Message-ID: <20210413025502.31579-4-nanich.lee@samsung.com> (raw)
In-Reply-To: <20210413025502.31579-1-nanich.lee@samsung.com>
Add limit_bio_size block sysfs node to limit bio size.
Queue flag QUEUE_FLAG_LIMIT_BIO_SIZE will be set if limit_bio_size is set.
And bio max size will be limited by queue max sectors via
QUEUE_FLAG_LIMIT_BIO_SIZE set.
Signed-off-by: Changheun Lee <nanich.lee@samsung.com>
---
Documentation/ABI/testing/sysfs-block | 10 ++++++++++
Documentation/block/queue-sysfs.rst | 7 +++++++
block/blk-sysfs.c | 3 +++
3 files changed, 20 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block
index e34cdeeeb9d4..86a7b15410cf 100644
--- a/Documentation/ABI/testing/sysfs-block
+++ b/Documentation/ABI/testing/sysfs-block
@@ -316,3 +316,13 @@ Description:
does not complete in this time then the block driver timeout
handler is invoked. That timeout handler can decide to retry
the request, to fail it or to start a device recovery strategy.
+
+What: /sys/block/<disk>/queue/limit_bio_size
+Date: Feb, 2021
+Contact: Changheun Lee <nanich.lee@samsung.com>
+Description:
+ (RW) Toggle for set/clear QUEUE_FLAG_LIMIT_BIO_SIZE queue flag.
+ Queue flag QUEUE_FLAG_LIMIT_BIO_SIZE will be set if limit_bio_size
+ is set. And bio max size will be limited by queue max sectors.
+ QUEUE_FLAG_LIMIT_BIO_SIZE will be cleared if limit_bio_size is
+ cleard. And limit of bio max size will be cleard.
diff --git a/Documentation/block/queue-sysfs.rst b/Documentation/block/queue-sysfs.rst
index 4dc7f0d499a8..220d183a4c11 100644
--- a/Documentation/block/queue-sysfs.rst
+++ b/Documentation/block/queue-sysfs.rst
@@ -286,4 +286,11 @@ sequential zones of zoned block devices (devices with a zoned attributed
that reports "host-managed" or "host-aware"). This value is always 0 for
regular block devices.
+limit_bio_size (RW)
+-------------------
+This indicates QUEUE_FLAG_LIMIT_BIO_SIZE queue flag value. And
+QUEUE_FLAG_LIMIT_BIO_SIZE can be changed via set(1)/clear(0) this node.
+bio max size will be limited by queue max sectors via set this node. And
+limit of bio max size will be cleard via clear this node.
+
Jens Axboe <jens.axboe@oracle.com>, February 2009
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 0f4f0c8a7825..4625d5319daf 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -294,6 +294,7 @@ QUEUE_SYSFS_BIT_FNS(nonrot, NONROT, 1);
QUEUE_SYSFS_BIT_FNS(random, ADD_RANDOM, 0);
QUEUE_SYSFS_BIT_FNS(iostats, IO_STAT, 0);
QUEUE_SYSFS_BIT_FNS(stable_writes, STABLE_WRITES, 0);
+QUEUE_SYSFS_BIT_FNS(limit_bio_size, LIMIT_BIO_SIZE, 0);
#undef QUEUE_SYSFS_BIT_FNS
static ssize_t queue_zoned_show(struct request_queue *q, char *page)
@@ -625,6 +626,7 @@ QUEUE_RW_ENTRY(queue_nonrot, "rotational");
QUEUE_RW_ENTRY(queue_iostats, "iostats");
QUEUE_RW_ENTRY(queue_random, "add_random");
QUEUE_RW_ENTRY(queue_stable_writes, "stable_writes");
+QUEUE_RW_ENTRY(queue_limit_bio_size, "limit_bio_size");
static struct attribute *queue_attrs[] = {
&queue_requests_entry.attr,
@@ -659,6 +661,7 @@ static struct attribute *queue_attrs[] = {
&queue_rq_affinity_entry.attr,
&queue_iostats_entry.attr,
&queue_stable_writes_entry.attr,
+ &queue_limit_bio_size_entry.attr,
&queue_random_entry.attr,
&queue_poll_entry.attr,
&queue_wc_entry.attr,
--
2.29.0
next prev parent reply other threads:[~2021-04-13 3:13 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20210413031256epcas1p2f3c3f140192178928b92fc070010354d@epcas1p2.samsung.com>
2021-04-13 2:54 ` [PATCH v7 0/3] limit bio max size Changheun Lee
[not found] ` <CGME20210413031257epcas1p329f38effa71445de2464cee32002e618@epcas1p3.samsung.com>
2021-04-13 2:55 ` [PATCH v7 1/3] bio: " Changheun Lee
2021-04-13 16:18 ` Bart Van Assche
[not found] ` <CGME20210415105608epcas1p269bae87b8a7dab133753f7916420251e@epcas1p2.samsung.com>
2021-04-15 10:38 ` Changheun Lee
2021-04-15 19:18 ` Bart Van Assche
[not found] ` <CGME20210416060827epcas1p39350d45cef64c91be681b76180b63140@epcas1p3.samsung.com>
2021-04-16 5:50 ` Changheun Lee
2021-04-16 15:28 ` Bart Van Assche
[not found] ` <CGME20210419060745epcas1p220138a5de8e08201a6bcd9193c37fc51@epcas1p2.samsung.com>
2021-04-19 5:49 ` Changheun Lee
2021-04-19 22:16 ` Bart Van Assche
[not found] ` <CGME20210420011139epcas1p429e791d6f8ffea596661e9366babbec8@epcas1p4.samsung.com>
2021-04-20 0:53 ` Changheun Lee
[not found] ` <CGME20210413031258epcas1p469e9bd0145a49d440541cee899fd4d8e@epcas1p4.samsung.com>
2021-04-13 2:55 ` [PATCH v7 2/3] ufs: set QUEUE_FLAG_LIMIT_BIO_SIZE Changheun Lee
2021-04-13 16:14 ` Bart Van Assche
[not found] ` <CGME20210414015804epcas1p21a7581e22dc553530c516459f32d78a9@epcas1p2.samsung.com>
2021-04-14 1:40 ` Changheun Lee
[not found] ` <CGME20210413031259epcas1p4406eaed9ba20e684fc038bf1937b94ff@epcas1p4.samsung.com>
2021-04-13 2:55 ` Changheun Lee [this message]
2021-04-13 7:35 ` [PATCH v7 3/3] bio: add limit_bio_size sysfs Greg KH
[not found] ` <CGME20210413113510epcas1p29dd90b47ba8c8701a2309fc34698ad29@epcas1p2.samsung.com>
2021-04-13 11:17 ` Changheun Lee
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