linux-kernel - Re: [RFC PATCH v3 09/19] scsi: core: increase/decrease target_busy without check can

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Message-ID: <0238dfce-49c2-43f0-9c71-556c7c5ffc75@acm.org>
Date: Thu, 13 Mar 2025 18:35:15 -0700
From: Bart Van Assche <bvanassche@....org>
To: JiangJianJun <jiangjianjun3@...wei.com>, jejb@...ux.ibm.com,
 martin.petersen@...cle.com, linux-scsi@...r.kernel.org
Cc: hare@...e.de, linux-kernel@...r.kernel.org, lixiaokeng@...wei.com,
 hewenliang4@...wei.com, yangkunlin7@...wei.com
Subject: Re: [RFC PATCH v3 09/19] scsi: core: increase/decrease target_busy
 without check can_queue

On 3/13/25 6:29 PM, JiangJianJun wrote:
> This is preparation for a genernal target based error handle strategy
> to check if to wake up actual error handler.

I don't like this change because it slows down the hot path for LLD
drivers that do not set starget->can_queue. Why is this change
necessary? What are the alternatives?

Thanks,

Bart.