From: Christoph Hellwig <hch@infradead.org>
To: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: John Garry <john.garry@huawei.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: Wed, 10 Oct 2018 23:36:03 -0700 [thread overview]
Message-ID: <20181011063603.GA3456@infradead.org> (raw)
In-Reply-To: <yq18t354532.fsf@oracle.com>
On Wed, Oct 10, 2018 at 09:58:25PM -0400, Martin K. Petersen wrote:
> > This is because the IPTT index must be a unique value per HBA. However,
> > if we switched to SCSI MQ, the block layer tag becomes unique per queue,
> > and not per HBA.
>
> That doesn't sound right.
blk-mq tags are always per-host (which has actually caused problems for
ATA, which is now using its own per-device tags).
next prev parent reply other threads:[~2018-10-11 6:36 UTC|newest]
Thread overview: 22+ 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 ` [PATCH 1/7] scsi: hisi_sas: Feed back linkrate(max/min) when re-attached 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 ` [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 ` [PATCH 4/7] scsi: hisi_sas: Free slot later in slot_complete_vx_hw() 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 ` [PATCH 6/7] scsi: hisi_sas: Use block layer tag instead for IPTT 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
2018-10-04 15:30 ` [PATCH 0/7] hisi_sas: Misc bugfixes and an optimisation patch John Garry
2018-10-11 1:58 ` Martin K. Petersen
2018-10-11 6:36 ` Christoph Hellwig [this message]
2018-10-11 9:59 ` John Garry
2018-10-11 10:15 ` Christoph Hellwig
2018-10-11 13:12 ` John Garry
2018-10-11 13:32 ` Ming Lei
2018-10-11 14:07 ` John Garry
2018-10-11 23:36 ` Ming Lei
2018-10-12 9:02 ` John Garry
2018-10-12 13:30 ` Ming Lei
2018-10-12 10:47 ` John Garry
2018-10-16 4:28 ` Martin K. Petersen
2018-10-16 8:28 ` John Garry
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