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From: Bart Van Assche <bvanassche@acm.org>
To: Mike Christie <michael.christie@oracle.com>,
	lduncan@suse.com, cleech@redhat.com, ming.lei@redhat.com,
	martin.petersen@oracle.com, linux-scsi@vger.kernel.org,
	james.bottomley@hansenpartnership.com
Subject: Re: [RFC PATCH 4/4] scsi: iscsi_tcp: Allow user to control if transmit from queuecommand
Date: Mon, 7 Mar 2022 21:10:21 -0800	[thread overview]
Message-ID: <56f5c05f-561e-0079-6996-866a047d7535@acm.org> (raw)
In-Reply-To: <20220308003957.123312-5-michael.christie@oracle.com>

On 3/7/22 16:39, Mike Christie wrote:
> +static bool iscsi_xmit_from_qc;
> +module_param_named(xmit_from_queuecommand, iscsi_xmit_from_qc, bool, 0644);
> +MODULE_PARM_DESC(xmit_from_queuecommand, "Set to true to try to xmit the task from the queuecommand callout. The default is false wihch will xmit the task from the iscsi_q workqueue.");

s/wihch/which/ ?

It may be hard for users to get the value of this parameter right. Has 
it been considered to make the iSCSI initiator select the proper mode 
depending on the load? I think the DPDK and SPDK software supports this. 
This is supported via user-level multithreading and by scaling to more 
CPU cores if required to achieve full performance.

Thanks,

Bart.

  reply	other threads:[~2022-03-08  5:10 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-08  0:39 [RFC PATCH 0/4] scsi/iscsi: Send iscsi data from kblockd Mike Christie
2022-03-08  0:39 ` [RFC PATCH 1/4] scsi: Allow drivers to set BLK_MQ_F_BLOCKING Mike Christie
2022-03-08  4:57   ` Bart Van Assche
2022-03-09  0:53   ` Ming Lei
2022-03-09  1:17     ` Mike Christie
2022-03-09  1:43       ` Ming Lei
2022-03-09 19:38         ` Mike Christie
2022-03-08  0:39 ` [RFC PATCH 2/4] scsi: iscsi: Tell drivers when we must not block Mike Christie
2022-03-08  4:59   ` Bart Van Assche
2022-03-08 15:58     ` Mike Christie
2022-03-08  0:39 ` [RFC PATCH 3/4] scsi: iscsi: Support transmit from queuecommand Mike Christie
2022-03-08  0:39 ` [RFC PATCH 4/4] scsi: iscsi_tcp: Allow user to control if " Mike Christie
2022-03-08  5:10   ` Bart Van Assche [this message]
2022-03-08 16:51     ` Mike Christie
     [not found] ` <CGME20220308004023epcas2p12ebd497c14d32f36d0aa6682c0b9d0db@epcms2p7>
2022-03-08  7:00   ` [RFC PATCH 1/4] scsi: Allow drivers to set BLK_MQ_F_BLOCKING Daejun Park
2022-03-08 16:14     ` Mike Christie
2022-03-15  8:26 ` [RFC PATCH 0/4] scsi/iscsi: Send iscsi data from kblockd Christoph Hellwig
2022-03-16  1:08   ` Ming Lei

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