From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: John Garry <john.garry@huawei.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
jejb@linux.vnet.ibm.com, linuxarm@huawei.com,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/7] hisi_sas: Misc bugfixes and an optimisation patch
Date: Tue, 16 Oct 2018 00:28:32 -0400 [thread overview]
Message-ID: <yq1h8hmv7kf.fsf@oracle.com> (raw)
In-Reply-To: <e771c366-2824-8774-4c90-9906992ee813@huawei.com> (John Garry's message of "Fri, 12 Oct 2018 11:47:05 +0100")
John,
> As I mentioned in the thread that spawned from this, we actually can't
> expose multiple hw queues at the moment. And, if we did, we find a
> performance drop due to having to go back to manage this IPTT
> internally.
>
> So how to handle? We're going to continue to work towards exposing
> multiple queues to upper layer, but for the moment I think patch 6/7 is
> a good change.
Thanks for the discussion. That's exactly what I was looking for.
Applied to 4.20/scsi-queue.
--
Martin K. Petersen Oracle Linux Engineering
WARNING: multiple messages have this Message-ID (diff)
From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: John Garry <john.garry@huawei.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
<jejb@linux.vnet.ibm.com>, <linuxarm@huawei.com>,
<linux-scsi@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/7] hisi_sas: Misc bugfixes and an optimisation patch
Date: Tue, 16 Oct 2018 00:28:32 -0400 [thread overview]
Message-ID: <yq1h8hmv7kf.fsf@oracle.com> (raw)
In-Reply-To: <e771c366-2824-8774-4c90-9906992ee813@huawei.com> (John Garry's message of "Fri, 12 Oct 2018 11:47:05 +0100")
John,
> As I mentioned in the thread that spawned from this, we actually can't
> expose multiple hw queues at the moment. And, if we did, we find a
> performance drop due to having to go back to manage this IPTT
> internally.
>
> So how to handle? We're going to continue to work towards exposing
> multiple queues to upper layer, but for the moment I think patch 6/7 is
> a good change.
Thanks for the discussion. That's exactly what I was looking for.
Applied to 4.20/scsi-queue.
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2018-10-16 4:28 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-24 15:06 [PATCH 0/7] hisi_sas: Misc bugfixes and an optimisation patch John Garry
2018-09-24 15:06 ` John Garry
2018-09-24 15:06 ` [PATCH 1/7] scsi: hisi_sas: Feed back linkrate(max/min) when re-attached John Garry
2018-09-24 15:06 ` John Garry
2018-09-24 15:06 ` [PATCH 2/7] scsi: hisi_sas: Move evaluation of hisi_hba in hisi_sas_task_prep() John Garry
2018-09-24 15:06 ` John Garry
2018-09-24 15:06 ` [PATCH 3/7] scsi: hisi_sas: Fix the race between IO completion and timeout for SMP/internal IO John Garry
2018-09-24 15:06 ` John Garry
2018-09-24 15:06 ` [PATCH 4/7] scsi: hisi_sas: Free slot later in slot_complete_vx_hw() John Garry
2018-09-24 15:06 ` John Garry
2018-09-24 15:06 ` [PATCH 5/7] scsi: hisi_sas: unmask interrupts ent72 and ent74 John Garry
2018-09-24 15:06 ` John Garry
2018-09-24 15:06 ` [PATCH 6/7] scsi: hisi_sas: Use block layer tag instead for IPTT John Garry
2018-09-24 15:06 ` John Garry
2018-09-24 15:06 ` [PATCH 7/7] scsi: hisi_sas: Update v3 hw AIP_LIMIT and CFG_AGING_TIME register values John Garry
2018-09-24 15:06 ` John Garry
2018-10-04 15:30 ` [PATCH 0/7] hisi_sas: Misc bugfixes and an optimisation patch John Garry
2018-10-04 15:30 ` John Garry
2018-10-11 1:58 ` Martin K. Petersen
2018-10-11 1:58 ` Martin K. Petersen
2018-10-11 6:36 ` Christoph Hellwig
2018-10-11 9:59 ` John Garry
2018-10-11 9:59 ` John Garry
2018-10-11 10:15 ` Christoph Hellwig
2018-10-11 13:12 ` John Garry
2018-10-11 13:12 ` John Garry
2018-10-11 13:32 ` Ming Lei
2018-10-11 14:07 ` John Garry
2018-10-11 14:07 ` John Garry
2018-10-11 23:36 ` Ming Lei
2018-10-12 9:02 ` John Garry
2018-10-12 9:02 ` John Garry
2018-10-12 13:30 ` Ming Lei
2018-10-12 13:30 ` Ming Lei
2018-10-12 10:47 ` John Garry
2018-10-12 10:47 ` John Garry
2018-10-16 4:28 ` Martin K. Petersen [this message]
2018-10-16 4:28 ` Martin K. Petersen
2018-10-16 8:28 ` John Garry
2018-10-16 8:28 ` John Garry
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