Re: [PATCH V4] scsi: core: only re-run queue in scsi_end_request() if device queue is busy

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To: Long Li <longli@xxxxxxxxxxxxx>
Subject: Re: [PATCH V4] scsi: core: only re-run queue in scsi_end_request() if device queue is busy
From: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>
Date: Mon, 31 Aug 2020 22:38:21 -0400
Cc: John Garry <john.garry@xxxxxxxxxx>, Ming Lei <ming.lei@xxxxxxxxxx>, James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>, "linux-scsi@xxxxxxxxxxxxxxx" <linux-scsi@xxxxxxxxxxxxxxx>, "Martin K . Petersen" <martin.petersen@xxxxxxxxxx>, "Ewan D . Milne" <emilne@xxxxxxxxxx>, Kashyap Desai <kashyap.desai@xxxxxxxxxxxx>, Hannes Reinecke <hare@xxxxxxx>, Bart Van Assche <bvanassche@xxxxxxx>, "linux-block@xxxxxxxxxxxxxxx" <linux-block@xxxxxxxxxxxxxxx>
In-reply-to: <BN8PR21MB1155A14705AA35680B25F9F4CE2E0@BN8PR21MB1155.namprd21.prod.outlook.com> (Long Li's message of "Tue, 1 Sep 2020 01:18:50 +0000")
Organization: Oracle Corporation
References: <20200817100840.2496976-1-ming.lei@redhat.com> <5805af73-c3ec-8393-0dc2-18fe797d781b@huawei.com> <BN8PR21MB1155A14705AA35680B25F9F4CE2E0@BN8PR21MB1155.namprd21.prod.outlook.com>

> On Azure Standard D64s v3 (64 vcpus, 256 GiB memory), it sees better
> CPU utilization with the patch.
>
> Tested-by: Long Li <longli@xxxxxxxxxxxxx>

Since this is a core change I'd like to see another review tag.

Thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering

References:
- [PATCH V4] scsi: core: only re-run queue in scsi_end_request() if device queue is busy
  - From: Ming Lei
- Re: [PATCH V4] scsi: core: only re-run queue in scsi_end_request() if device queue is busy
  - From: John Garry
- RE: [PATCH V4] scsi: core: only re-run queue in scsi_end_request() if device queue is busy
  - From: Long Li

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