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From: chenxiang <chenxiang66@hisilicon.com>
To: <jejb@linux.ibm.com>, <martin.petersen@oracle.com>
Cc: <linux-scsi@vger.kernel.org>, <linuxarm@huawei.com>,
	<john.garry@huawei.com>, Xiang Chen <chenxiang66@hisilicon.com>
Subject: [PATCH v2 15/15] scsi: hisi_sas: Use autosuspend for the host controller
Date: Mon, 20 Dec 2021 19:21:38 +0800	[thread overview]
Message-ID: <1639999298-244569-16-git-send-email-chenxiang66@hisilicon.com> (raw)
In-Reply-To: <1639999298-244569-1-git-send-email-chenxiang66@hisilicon.com>

From: Xiang Chen <chenxiang66@hisilicon.com>

The controller may frequently enter and exit suspend for each IO which we
need to deal with. This is inefficient and may cause too much suspend and
resume activity for the controller.
To avoid this, use a default 5s autosuspend for the controller to stop
frequently suspending and resuming. This value may still be modified via
sysfs interfaces.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Acked-by: John Garry <john.garry@huawei.com>
---
 drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index 94eb48c93ab1..a45ef9a5e12e 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -4783,6 +4783,8 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 
 	scsi_scan_host(shost);
 
+	pm_runtime_set_autosuspend_delay(dev, 5000);
+	pm_runtime_use_autosuspend(dev);
 	/*
 	 * For the situation that there are ATA disks connected with SAS
 	 * controller, it additionally creates ata_port which will affect the
-- 
2.33.0


  parent reply	other threads:[~2021-12-20 11:27 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-20 11:21 [PATCH v2 00/15] Add runtime PM support for libsas chenxiang
2021-12-20 11:21 ` [PATCH v2 01/15] libsas: Don't always drain event workqueue for HA resume chenxiang
2021-12-20 11:21 ` [PATCH v2 02/15] Revert "scsi: hisi_sas: Filter out new PHY up events during suspend" chenxiang
2021-12-20 11:21 ` [PATCH v2 03/15] scsi/block PM: Always set request queue runtime active in blk_post_runtime_resume() chenxiang
2021-12-20 11:21 ` [PATCH v2 04/15] scsi: libsas: Add spin_lock/unlock() to protect asd_sas_port->phy_list chenxiang
2021-12-20 11:21 ` [PATCH v2 05/15] scsi: hisi_sas: Fix some issues related to asd_sas_port->phy_list chenxiang
2021-12-27 17:25   ` Nathan Chancellor
2021-12-28  2:03     ` chenxiang (M)
2022-01-04 10:02       ` John Garry
2022-01-04 11:38         ` chenxiang (M)
2021-12-20 11:21 ` [PATCH v2 06/15] scsi: mvsas: Add spin_lock/unlock() to protect asd_sas_port->phy_list chenxiang
2021-12-20 11:21 ` [PATCH v2 07/15] scsi: libsas: Insert PORTE_BROADCAST_RCVD event for resuming host chenxiang
2021-12-20 11:21 ` [PATCH v2 08/15] scsi: hisi_sas: Add more logs for runtime suspend/resume chenxiang
2021-12-20 11:21 ` [PATCH v2 09/15] scsi: libsas: Resume host while sending SMP IOs chenxiang
2021-12-20 11:21 ` [PATCH v2 10/15] scsi: libsas: Add flag SAS_HA_RESUMING chenxiang
2021-12-20 11:21 ` [PATCH v2 11/15] scsi: libsas: Refactor sas_queue_deferred_work() chenxiang
2021-12-20 11:21 ` [PATCH v2 12/15] scsi: libsas: Defer works of new phys during suspend chenxiang
2021-12-20 11:21 ` [PATCH v2 13/15] scsi: hisi_sas: Keep controller active between ISR of phyup and the event being processed chenxiang
2021-12-20 11:21 ` [PATCH v2 14/15] scsi: libsas: Keep host active while processing events chenxiang
2021-12-20 11:21 ` chenxiang [this message]
2021-12-23  4:39 ` [PATCH v2 00/15] Add runtime PM support for libsas Martin K. Petersen

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