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From: Alan Stern <stern@rowland.harvard.edu>
To: Bart Van Assche <bvanassche@acm.org>
Cc: Martin Kepplinger <martin.kepplinger@puri.sm>,
	jejb@linux.ibm.com, Can Guo <cang@codeaurora.org>,
	martin.petersen@oracle.com, linux-scsi@vger.kernel.org,
	linux-kernel@vger.kernel.org, kernel@puri.sm
Subject: Re: [PATCH] scsi: sd: add runtime pm to open / release
Date: Tue, 30 Jun 2020 20:49:58 -0400
Message-ID: <20200701004958.GA473187@rowland.harvard.edu> (raw)
In-Reply-To: <f17e9ebe-fc75-fb51-cc9b-851fa219f31b@acm.org>

On Tue, Jun 30, 2020 at 04:31:58PM -0700, Bart Van Assche wrote:
> On 2020-06-30 12:38, Alan Stern wrote:
> > Assume that BLK_MQ_REQ_PREEMPT is set in flags.  Then where exactly 
> > does blk_queue_enter(q, flags) call blk_pm_request_resume(q)?
> 
> Please take a look at how the *current* implementation of runtime power
> management works. Your question is relevant for the old implementation
> of runtime power management but not for the current implementation.

What do you mean by "current"?  I have been looking at the implementation 
in 5.8-rc3 from Linus's tree.  Should I look somewhere else?

Alan Stern

  reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-23 11:10 Martin Kepplinger
2020-06-24 13:33 ` Bart Van Assche
2020-06-25  8:16   ` Martin Kepplinger
2020-06-25 14:52     ` Alan Stern
2020-06-26  3:53     ` Bart Van Assche
2020-06-26 15:07     ` Bart Van Assche
2020-06-26 15:44       ` Alan Stern
2020-06-28  2:37         ` Bart Van Assche
2020-06-28 13:10           ` Alan Stern
2020-06-29  9:42         ` Martin Kepplinger
2020-06-29 16:15           ` Alan Stern
2020-06-29 16:56             ` Bart Van Assche
2020-06-29 17:40               ` Alan Stern
2020-06-30  3:33             ` Martin Kepplinger
2020-06-30 13:38               ` Alan Stern
2020-06-30 15:59             ` Bart Van Assche
2020-06-30 18:02               ` Alan Stern
2020-06-30 19:23                 ` Bart Van Assche
2020-06-30 19:38                   ` Alan Stern
2020-06-30 23:31                     ` Bart Van Assche
2020-07-01  0:49                       ` Alan Stern [this message]
2020-07-06 16:41                         ` Alan Stern

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