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Tue, 13 Apr 2021 03:12:59 +0000 (GMT) From: Changheun Lee 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 Subject: [PATCH v7 3/3] bio: add limit_bio_size sysfs Date: Tue, 13 Apr 2021 11:55:02 +0900 Message-Id: <20210413025502.31579-4-nanich.lee@samsung.com> X-Mailer: git-send-email 2.29.0 In-Reply-To: <20210413025502.31579-1-nanich.lee@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Brightmail-Tracker: H4sIAAAAAAAAA02Te0xTVxzHd3rb21ZhXgqDs67RWsUgCrRA4TjLNBHJNUqELWYJLJYO7nis r/XBdLKEWAQEBBqIZpW3RBmPoch7MBbYmB3IUGQVFwQDxrHMgiAGJsy1XMj47/c7v8/3fM/v d87hYLwXOJ+TrDZQOrVCKcK3MFv79vr5yVyMceK+ZW9UUtsKUN14AY4uzy1j6ELWKwYyXWvE 0UBhFQPlTZ9nodWcxwy0+ESPuh/tQyOdJTjqLTIx0JXbJRj6fWKQjfoejzLRk2ozhoas8yxU NnUY/XPjZ4Bml2xs9Gt7EYYau5fxw57kyIPjpNlkZ5MdlnE2ebvGlxy5aySbai/iZE9pPZuc /WEUJ/ObawG50LSdzPoxlxG1NUYpS6IUCZROSKnjNQnJ6sQw0fGP5Efk0hCxxE9yAIWKhGqF igoThZ+I8otIVjo6FQlTFUqjYylKodeLAj6Q6TRGAyVM0ugNYSJKm6DUSsRaf71CpTeqE/3j Nar3JWJxoNRBximT3tj+YGov8c/Y6/ekgwrPHMDlQCIY3n/4PSsHbOHwiHYAm2/cZdLJPIBP Lf0YnSwAOPNvF2NDUnbZzqALnQBefFiPOwtrVPHLY84YJ/bD/OePcCfkQVgZcKluADgTjJgC 8IE101HhcNwJKbw2w3IKmIQ3rCorZjpjV+IgvDlqw2i3HXBlIg9z4lxCBkerVDTiBq3fTK/h mAMxtVxdOykkTFw41JGN09pw2Nx6i0XH7vCvX5rZdMyHC/ZunBbkAmjKLAd0Ughg9bPr630G wfmFBeB0xoi9sLEzgF7eCTtelwLa+W1oX8xjORFIuMLsTB6N7IaDGRPYhtezho71HUk4PPb3 +rALAHxRfgUUAqFlU0OWTQ1Z/neuAFgt8KS0elUipZdoJZuvuAmsvX1faTswP5/z7wUMDugF kIOJPFwjig1xPNcExdmvKJ1GrjMqKX0vkDqmbcb478RrHJ9HbZBLpIFBQUEoOCQ0RBok8nL9 VDwp5xGJCgP1OUVpKd2GjsHh8tMZPj6Tp7qEW/efYEbJw3a+WdJWcLMiybajmT1epysCLwjA xz1dtqqWL9XxIKDvNYsbKzhYzotMDl126eef3f1FarR9Lq101HdFEq2PXeWKuD3uu2wBh66m DKTY+gVp1qnKnwBTAmMFYPWt6bBg2Z6YjMnKIllG2v30bfeYbjWeQ41d4dkNOwR2t3bpEWlL GfmJh7ivcjjjWP6p6pozJ1cyTrdd2u79KtfrkHX2uuqzfX/OciKfiusifHaB3w4vKszy+TGL lndv9Vuj58rLW2Md562h0jt5733HS5lKPXB05uvx6JN30nNtBR+eGy4s8BUMntO+W+4iaBuI udkjlDU0mkVMfZJC4ovp9Ir/AKawa+CEBAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrBIsWRmVeSWpSXmKPExsWy7bCSvK41T2mCwa/52hZzVm1jtFh9t5/N YtqHn8wWre3fmCyaF69nszg9YRGTRc+TJlaLv133mCy+Piy22HtL2+LyrjlsFocmNzNZTN88 h9ni2v0z7BaH711lsXi4ZCKzxbmTn1gt5j12sPi1/Cijxfsf19ktTu2YzGyxfu9PNgcxj8tX vD0mNr9j99g56y67x+YVWh6Xz5Z6bFrVyeaxf+4ado/3+66yefRtWcXo8XmTnEf7gW6mAO4o LpuU1JzMstQifbsEroz/12+zFPRKVbxbo9bAuECsi5GTQ0LARGLetHdMXYxcHEICOxgl/vbO YIZISEkcP/GWtYuRA8gWljh8uBii5iOjxPbb/WA1bAI6En1vb7GBJEQEbjNJXNpylAXEYRZ4 zSjR9XgRC0i3sICpxOKXrCANLAKqEovmTWEBsXkFrCU2XL0OtUxe4s/9HmaQck4BG4mri3JB wkJAJX93HWWGKBeUODnzCVgrM1B589bZzBMYBWYhSc1CklrAyLSKUTK1oDg3PbfYsMAoL7Vc rzgxt7g0L10vOT93EyM4MrW0djDuWfVB7xAjEwfjIUYJDmYlEV63KSUJQrwpiZVVqUX58UWl OanFhxilOViUxHkvdJ2MFxJITyxJzU5NLUgtgskycXBKNTDJfz10avNO5huTHr5+fHdK/muB hmc+7o73Q1yeLC3dPWm5KMujvi1O8VxHaq00lnmnLT149PGFJbN+5PLoeoQV3OS0S49JmT91 Z9eUNVlXvu/fdm5VRb+clH1Y7Ap/UacLuVPuH2U12mU1RWyl4gejg4b7mj/16marFk48/P3X o/cbfNYtvjb5CkPAy2Xru9POBxl9PnPu4v9Ats2npvouZH24YNae+1Ixyna9fCt/TFubtXeS l9uXfV9dFzRe+pIj6TWXjc/qVM4drQ2y8Y/2yTzJnMW85WXpVPa3vQHp0jp/5Y+szljdYG3J KCjuWcj4tdBpaYP5sbVLJ5nt+26mUXjhykUnLvcdXuszHk09ukKJpTgj0VCLuag4EQBH07cs OwMAAA== X-CMS-MailID: 20210413031259epcas1p4406eaed9ba20e684fc038bf1937b94ff X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: SVC_REQ_APPROVE CMS-TYPE: 101P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20210413031259epcas1p4406eaed9ba20e684fc038bf1937b94ff References: <20210413025502.31579-1-nanich.lee@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org 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 --- 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//queue/limit_bio_size +Date: Feb, 2021 +Contact: Changheun Lee +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 , 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