linux-kernel - Re: Stop SSD from waiting for "Spinning up disk..."

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Message-ID: <C00A81C3-4B07-4F0C-82EE-7A224793BD9A@osknowledge.org>
Date:	Tue, 23 Jun 2015 18:51:07 +0000
From:	Marc Burkhardt <marc@...nowledge.org>
To:	Jeff Chua <jeff.chua.linux@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@....de>
Subject: Re: Stop SSD from waiting for "Spinning up disk..."

You might want to grep for QUEUE_FLAG_NONROT or queue_nonrot_entry...

Regards,
Marc

P.S: sent from mobile, might be short.

Am 23. Juni 2015 17:02:22 MESZ, schrieb Jeff Chua <jeff.chua.linux@...il.com>:
>On Mon, Jun 22, 2015 at 11:36 PM, Greg Kroah-Hartman
><gregkh@...uxfoundation.org> wrote:
>> On Mon, Jun 22, 2015 at 03:25:29PM +0800, Jeff Chua wrote:
>>>
>>> There's no need to wait for disk spin-up for USB SSD devices. This
>patch
>>> allow the SSD to skip waiting disk spin-up by passing sd_mod.ssd=1
>during
>>> boot-up.
>>>
>>> If there's a better way to handle this, please share.
>>
>> Module parameters are never a solution for a device-specific
>property,
>> sorry.
>
>Greg,
>
>SSD is coming mainstream and it doesn't make sense wasting time
>spinning up "disk" ...
>
>
>Jeff.
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