From: Adam Manzanares <adam.manzanares@wdc.com>
To: Sathya Prakash Veerichetty <sathya.prakash@broadcom.com>
Cc: Adam Manzanares <adam.manzanares@hgst.com>, <axboe@kernel.dk>,
<tj@kernel.org>, <dan.j.williams@intel.com>, <hare@suse.de>,
<martin.petersen@oracle.com>, <mchristi@redhat.com>,
<toshi.kani@hpe.com>, <ming.lei@canonical.com>,
Chaitra Basappa <chaitra.basappa@broadcom.com>,
Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>,
<linux-block@vger.kernel.org>, <linux-ide@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
PDL-MPT-FUSIONLINUX <mpt-fusionlinux.pdl@broadcom.com>,
<linux-scsi@vger.kernel.org>
Subject: Re: [PATCH v4 2/4] fusion: remove iopriority handling
Date: Thu, 13 Oct 2016 15:12:25 -0700 [thread overview]
Message-ID: <20161013221225.GB2745@hgst.com> (raw)
In-Reply-To: <8338586db99fd444337d27f9abc3a777@mail.gmail.com>
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Lgo=
WARNING: multiple messages have this Message-ID (diff)
From: Adam Manzanares <adam.manzanares@wdc.com>
To: Sathya Prakash Veerichetty <sathya.prakash@broadcom.com>
Cc: Adam Manzanares <adam.manzanares@hgst.com>,
axboe@kernel.dk, tj@kernel.org, dan.j.williams@intel.com,
hare@suse.de, martin.petersen@oracle.com, mchristi@redhat.com,
toshi.kani@hpe.com, ming.lei@canonical.com,
Chaitra Basappa <chaitra.basappa@broadcom.com>,
Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>,
linux-block@vger.kernel.org, linux-ide@vger.kernel.org,
linux-kernel@vger.kernel.org,
PDL-MPT-FUSIONLINUX <mpt-fusionlinux.pdl@broadcom.com>,
linux-scsi@vger.kernel.org
Subject: Re: [PATCH v4 2/4] fusion: remove iopriority handling
Date: Thu, 13 Oct 2016 15:12:25 -0700 [thread overview]
Message-ID: <20161013221225.GB2745@hgst.com> (raw)
In-Reply-To: <8338586db99fd444337d27f9abc3a777@mail.gmail.com>
The 10/13/2016 15:05, Sathya Prakash Veerichetty wrote:
> By removing the code below, we put all the commands for all the types of
> devices (SAS/SATA) as simple-Q (requeue as the device require) and I am
> not sure whether it is the intention of this change.
>
This is the intention of the change. I don't think the iopriority of the
request is being used correctly. What does it mean to use 0x7 as an
indicator that a command should be put at the head of the queue? This
would be clearer if it was using some of the macros from ioprio. If
0x7 means something special I think this should be some #define in the
includes of the fusion driver with some documentation.
> -----Original Message-----
> From: Adam Manzanares [mailto:adam.manzanares@hgst.com]
> Sent: Thursday, October 13, 2016 1:54 PM
> To: axboe@kernel.dk; tj@kernel.org; dan.j.williams@intel.com;
> hare@suse.de; martin.petersen@oracle.com; mchristi@redhat.com;
> toshi.kani@hpe.com; ming.lei@canonical.com; sathya.prakash@broadcom.com;
> chaitra.basappa@broadcom.com; suganath-prabu.subramani@broadcom.com
> Cc: linux-block@vger.kernel.org; linux-ide@vger.kernel.org;
> linux-kernel@vger.kernel.org; MPT-FusionLinux.pdl@broadcom.com;
> linux-scsi@vger.kernel.org; Adam Manzanares; Adam Manzanares
> Subject: [PATCH v4 2/4] fusion: remove iopriority handling
>
> The request priority is now by default coming from the ioc. It was not
> clear what this code was trying to do based upon the iopriority class or
> data. The driver should check that a device supports priorities and use
> them according to the specificiations of ioprio.
>
> Signed-off-by: Adam Manzanares <adam.manzanares@wdc.com>
> ---
> drivers/message/fusion/mptscsih.c | 5 -----
> 1 file changed, 5 deletions(-)
>
> diff --git a/drivers/message/fusion/mptscsih.c
> b/drivers/message/fusion/mptscsih.c
> index 6c9fc11..4740bb6 100644
> --- a/drivers/message/fusion/mptscsih.c
> +++ b/drivers/message/fusion/mptscsih.c
> @@ -1369,11 +1369,6 @@ mptscsih_qcmd(struct scsi_cmnd *SCpnt)
> if ((vdevice->vtarget->tflags & MPT_TARGET_FLAGS_Q_YES)
> && (SCpnt->device->tagged_supported)) {
> scsictl = scsidir | MPI_SCSIIO_CONTROL_SIMPLEQ;
> - if (SCpnt->request && SCpnt->request->ioprio) {
> - if (((SCpnt->request->ioprio & 0x7) == 1) ||
> - !(SCpnt->request->ioprio & 0x7))
> - scsictl |= MPI_SCSIIO_CONTROL_HEADOFQ;
> - }
> } else
> scsictl = scsidir | MPI_SCSIIO_CONTROL_UNTAGGED;
>
> --
> 2.1.4
>
> Western Digital Corporation (and its subsidiaries) E-mail Confidentiality
> Notice & Disclaimer:
>
> This e-mail and any files transmitted with it may contain confidential or
> legally privileged information of WDC and/or its affiliates, and are
> intended solely for the use of the individual or entity to which they are
> addressed. If you are not the intended recipient, any disclosure, copying,
> distribution or any action taken or omitted to be taken in reliance on it,
> is prohibited. If you have received this e-mail in error, please notify
> the sender immediately and delete the e-mail in its entirety from your
> system.
> --
> To unsubscribe from this list: send the line "unsubscribe linux-ide" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
Take care,
Adam
WARNING: multiple messages have this Message-ID (diff)
From: Adam Manzanares <adam.manzanares@wdc.com>
To: Sathya Prakash Veerichetty <sathya.prakash@broadcom.com>
Cc: Adam Manzanares <adam.manzanares@hgst.com>, <axboe@kernel.dk>,
<tj@kernel.org>, <dan.j.williams@intel.com>, <hare@suse.de>,
<martin.petersen@oracle.com>, <mchristi@redhat.com>,
<toshi.kani@hpe.com>, <ming.lei@canonical.com>,
Chaitra Basappa <chaitra.basappa@broadcom.com>,
Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>,
<linux-block@vger.kernel.org>, <linux-ide@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
PDL-MPT-FUSIONLINUX <mpt-fusionlinux.pdl@broadcom.com>,
<linux-scsi@vger.kernel.org>
Subject: Re: [PATCH v4 2/4] fusion: remove iopriority handling
Date: Thu, 13 Oct 2016 15:12:25 -0700 [thread overview]
Message-ID: <20161013221225.GB2745@hgst.com> (raw)
In-Reply-To: <8338586db99fd444337d27f9abc3a777@mail.gmail.com>
The 10/13/2016 15:05, Sathya Prakash Veerichetty wrote:
> By removing the code below, we put all the commands for all the types of
> devices (SAS/SATA) as simple-Q (requeue as the device require) and I am
> not sure whether it is the intention of this change.
>
This is the intention of the change. I don't think the iopriority of the
request is being used correctly. What does it mean to use 0x7 as an
indicator that a command should be put at the head of the queue? This
would be clearer if it was using some of the macros from ioprio. If
0x7 means something special I think this should be some #define in the
includes of the fusion driver with some documentation.
> -----Original Message-----
> From: Adam Manzanares [mailto:adam.manzanares@hgst.com]
> Sent: Thursday, October 13, 2016 1:54 PM
> To: axboe@kernel.dk; tj@kernel.org; dan.j.williams@intel.com;
> hare@suse.de; martin.petersen@oracle.com; mchristi@redhat.com;
> toshi.kani@hpe.com; ming.lei@canonical.com; sathya.prakash@broadcom.com;
> chaitra.basappa@broadcom.com; suganath-prabu.subramani@broadcom.com
> Cc: linux-block@vger.kernel.org; linux-ide@vger.kernel.org;
> linux-kernel@vger.kernel.org; MPT-FusionLinux.pdl@broadcom.com;
> linux-scsi@vger.kernel.org; Adam Manzanares; Adam Manzanares
> Subject: [PATCH v4 2/4] fusion: remove iopriority handling
>
> The request priority is now by default coming from the ioc. It was not
> clear what this code was trying to do based upon the iopriority class or
> data. The driver should check that a device supports priorities and use
> them according to the specificiations of ioprio.
>
> Signed-off-by: Adam Manzanares <adam.manzanares@wdc.com>
> ---
> drivers/message/fusion/mptscsih.c | 5 -----
> 1 file changed, 5 deletions(-)
>
> diff --git a/drivers/message/fusion/mptscsih.c
> b/drivers/message/fusion/mptscsih.c
> index 6c9fc11..4740bb6 100644
> --- a/drivers/message/fusion/mptscsih.c
> +++ b/drivers/message/fusion/mptscsih.c
> @@ -1369,11 +1369,6 @@ mptscsih_qcmd(struct scsi_cmnd *SCpnt)
> if ((vdevice->vtarget->tflags & MPT_TARGET_FLAGS_Q_YES)
> && (SCpnt->device->tagged_supported)) {
> scsictl = scsidir | MPI_SCSIIO_CONTROL_SIMPLEQ;
> - if (SCpnt->request && SCpnt->request->ioprio) {
> - if (((SCpnt->request->ioprio & 0x7) == 1) ||
> - !(SCpnt->request->ioprio & 0x7))
> - scsictl |= MPI_SCSIIO_CONTROL_HEADOFQ;
> - }
> } else
> scsictl = scsidir | MPI_SCSIIO_CONTROL_UNTAGGED;
>
> --
> 2.1.4
>
> Western Digital Corporation (and its subsidiaries) E-mail Confidentiality
> Notice & Disclaimer:
>
> This e-mail and any files transmitted with it may contain confidential or
> legally privileged information of WDC and/or its affiliates, and are
> intended solely for the use of the individual or entity to which they are
> addressed. If you are not the intended recipient, any disclosure, copying,
> distribution or any action taken or omitted to be taken in reliance on it,
> is prohibited. If you have received this e-mail in error, please notify
> the sender immediately and delete the e-mail in its entirety from your
> system.
> --
> To unsubscribe from this list: send the line "unsubscribe linux-ide" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
Take care,
Adam
next prev parent reply other threads:[~2016-10-13 22:12 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-13 19:53 [PATCH v4 0/4] Enabling ATA Command Priorities Adam Manzanares
2016-10-13 19:53 ` Adam Manzanares
2016-10-13 19:53 ` Adam Manzanares
2016-10-13 19:53 ` [PATCH v4 1/4] block: Add iocontext priority to request Adam Manzanares
2016-10-13 19:53 ` Adam Manzanares
2016-10-13 19:53 ` Adam Manzanares
2016-10-13 20:06 ` Dan Williams
2016-10-13 20:09 ` Jens Axboe
2016-10-13 20:19 ` Dan Williams
2016-10-13 20:24 ` Jens Axboe
2016-10-13 20:59 ` Dan Williams
2016-10-13 21:07 ` Jens Axboe
2016-10-13 22:02 ` Adam Manzananares
2016-10-13 22:02 ` Adam Manzananares
2016-10-13 22:02 ` Adam Manzananares
2016-10-14 5:54 ` Hannes Reinecke
2016-10-14 5:54 ` Hannes Reinecke
2016-10-14 18:35 ` Adam Manzananares
2016-10-14 18:35 ` Adam Manzananares
2016-10-14 18:35 ` Adam Manzananares
2016-10-15 8:43 ` Hannes Reinecke
2016-10-13 19:53 ` [PATCH v4 2/4] fusion: remove iopriority handling Adam Manzanares
2016-10-13 19:53 ` Adam Manzanares
2016-10-13 19:53 ` Adam Manzanares
2016-10-13 21:05 ` Sathya Prakash Veerichetty
2016-10-13 21:05 ` Sathya Prakash Veerichetty
2016-10-13 22:12 ` Adam Manzanares [this message]
2016-10-13 22:12 ` Adam Manzanares
2016-10-13 22:12 ` Adam Manzanares
2016-10-14 5:55 ` Hannes Reinecke
2016-10-14 5:55 ` Hannes Reinecke
2016-10-13 19:53 ` [PATCH v4 3/4] ata: Enabling ATA Command Priorities Adam Manzanares
2016-10-13 19:53 ` Adam Manzanares
2016-10-13 19:53 ` Adam Manzanares
2016-10-13 19:53 ` [PATCH v4 4/4] ata: ATA Command Priority Disabled By Default Adam Manzanares
2016-10-13 19:53 ` Adam Manzanares
2016-10-13 19:53 ` Adam Manzanares
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