From: Ming Lei <ming.lei@redhat.com>
To: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org,
"Martin K . Petersen" <martin.petersen@oracle.com>,
linux-scsi@vger.kernel.org
Cc: Omar Sandoval <osandov@fb.com>,
Kashyap Desai <kashyap.desai@broadcom.com>,
Sumanesh Samanta <sumanesh.samanta@broadcom.com>,
"Ewan D . Milne" <emilne@redhat.com>,
Hannes Reinecke <hare@suse.de>
Subject: [PATCH V5 11/13] scsi: add scsi_device_busy() to read sdev->device_busy
Date: Thu, 19 Nov 2020 17:53:01 +0800 [thread overview]
Message-ID: <20201119095301.GC279559@T590> (raw)
In-Reply-To: <20201119094705.280390-1-ming.lei@redhat.com>
From dee1bcb1a160d933e83c690ee858be4b1f4fcb22 Mon Sep 17 00:00:00 2001
From: Ming Lei <ming.lei@redhat.com>
Date: Sun, 9 Feb 2020 12:22:46 +0800
Subject: [PATCH V5 11/13] scsi: add scsi_device_busy() to read
sdev->device_busy
Add scsi_device_busy() for drivers, so that we can prepare for tracking
device queue depth via sbitmap_queue.
Cc: Omar Sandoval <osandov@fb.com>
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: Sumanesh Samanta <sumanesh.samanta@broadcom.com>
Cc: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Tested-by: Sumanesh Samanta <sumanesh.samanta@broadcom.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
drivers/message/fusion/mptsas.c | 2 +-
drivers/scsi/mpt3sas/mpt3sas_scsih.c | 2 +-
drivers/scsi/scsi_lib.c | 4 ++--
drivers/scsi/scsi_sysfs.c | 2 +-
drivers/scsi/sg.c | 2 +-
include/scsi/scsi_device.h | 5 +++++
6 files changed, 11 insertions(+), 6 deletions(-)
diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index 18b91ea1a353..25dd9b2e12ab 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -3756,7 +3756,7 @@ mptsas_send_link_status_event(struct fw_event_work *fw_event)
printk(MYIOC_s_DEBUG_FMT
"SDEV OUTSTANDING CMDS"
"%d\n", ioc->name,
- atomic_read(&sdev->device_busy)));
+ scsi_device_busy(sdev)));
}
}
diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index 5f845d7094fc..ea1bed3e7a4a 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -3255,7 +3255,7 @@ scsih_dev_reset(struct scsi_cmnd *scmd)
MPI2_SCSITASKMGMT_TASKTYPE_LOGICAL_UNIT_RESET, 0, 0,
tr_timeout, tr_method);
/* Check for busy commands after reset */
- if (r == SUCCESS && atomic_read(&scmd->device->device_busy))
+ if (r == SUCCESS && scsi_device_busy(scmd->device))
r = FAILED;
out:
sdev_printk(KERN_INFO, scmd->device, "device reset: %s scmd(0x%p)\n",
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index dafcfa3ae77c..4709418c47e0 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -384,7 +384,7 @@ static void scsi_single_lun_run(struct scsi_device *current_sdev)
static inline bool scsi_device_is_busy(struct scsi_device *sdev)
{
- if (atomic_read(&sdev->device_busy) >= sdev->queue_depth)
+ if (scsi_device_busy(sdev) >= sdev->queue_depth)
return true;
if (atomic_read(&sdev->device_blocked) > 0)
return true;
@@ -1632,7 +1632,7 @@ static int scsi_mq_get_budget(struct request_queue *q)
* the .restarts flag, and the request queue will be run for handling
* this request, see scsi_end_request().
*/
- if (unlikely(atomic_read(&sdev->device_busy) == 0 &&
+ if (unlikely(scsi_device_busy(sdev) == 0 &&
!scsi_device_blocked(sdev)))
blk_mq_delay_run_hw_queues(sdev->request_queue, SCSI_QUEUE_DELAY);
return -1;
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index d6e344fa33ad..ef5c79037bde 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -670,7 +670,7 @@ sdev_show_device_busy(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct scsi_device *sdev = to_scsi_device(dev);
- return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_busy));
+ return snprintf(buf, 20, "%d\n", scsi_device_busy(sdev));
}
static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL);
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index bfa8d77322d7..4fa2fbb2c833 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -2504,7 +2504,7 @@ static int sg_proc_seq_show_dev(struct seq_file *s, void *v)
scsidp->id, scsidp->lun, (int) scsidp->type,
1,
(int) scsidp->queue_depth,
- (int) atomic_read(&scsidp->device_busy),
+ (int) scsi_device_busy(scsidp),
(int) scsi_device_online(scsidp));
}
read_unlock_irqrestore(&sg_index_lock, iflags);
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 1a5c9a3df6d6..dd0b9f690a26 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -590,6 +590,11 @@ static inline int scsi_device_supports_vpd(struct scsi_device *sdev)
return 0;
}
+static inline int scsi_device_busy(struct scsi_device *sdev)
+{
+ return atomic_read(&sdev->device_busy);
+}
+
#define MODULE_ALIAS_SCSI_DEVICE(type) \
MODULE_ALIAS("scsi:t-" __stringify(type) "*")
#define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x"
--
2.25.4
next prev parent reply other threads:[~2020-11-19 9:53 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-19 9:46 [PATCH V5 00/13] blk-mq/scsi: tracking device queue depth via sbitmap Ming Lei
2020-11-19 9:46 ` [PATCH V5 01/13] sbitmap: remove sbitmap_clear_bit_unlock Ming Lei
2020-11-19 9:46 ` [PATCH V5 02/13] sbitmap: maintain allocation round_robin in sbitmap Ming Lei
2020-11-19 9:46 ` [PATCH V5 03/13] sbitmap: add helpers for updating allocation hint Ming Lei
2020-11-19 9:46 ` [PATCH V5 04/13] sbitmap: move allocation hint into sbitmap Ming Lei
2020-11-19 9:46 ` [PATCH V5 05/13] sbitmap: export sbitmap_weight Ming Lei
2020-11-19 9:46 ` [PATCH V5 06/13] sbitmap: add helper of sbitmap_calculate_shift Ming Lei
2020-11-19 9:46 ` [PATCH V5 07/13] blk-mq: add callbacks for storing & retrieving budget token Ming Lei
2020-11-19 9:47 ` [PATCH V5 08/13] blk-mq: return budget token from .get_budget callback Ming Lei
2020-11-19 9:47 ` [PATCH V5 09/13] scsi: put hot fields of scsi_host_template into one cacheline Ming Lei
2020-11-19 9:51 ` [PATCH V5 10/13] megaraid_sas: v2 replace sdev_busy with local Ming Lei
2020-11-19 10:29 ` Hannes Reinecke
2020-11-20 1:35 ` [PATCH V6 10/13] megaraid_sas: v2 replace sdev_busy with local counter Ming Lei
2020-11-19 9:53 ` Ming Lei [this message]
2020-11-19 9:54 ` [PATCH V5 12/13] scsi: make sure sdev->queue_depth is <= max(shost->can_queue, 1024) Ming Lei
2020-11-19 9:55 ` [PATCH V5 13/13] scsi: replace sdev->device_busy with sbitmap Ming Lei
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20201119095301.GC279559@T590 \
--to=ming.lei@redhat.com \
--cc=axboe@kernel.dk \
--cc=emilne@redhat.com \
--cc=hare@suse.de \
--cc=kashyap.desai@broadcom.com \
--cc=linux-block@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=martin.petersen@oracle.com \
--cc=osandov@fb.com \
--cc=sumanesh.samanta@broadcom.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).