linux-kernel - Re: [PATCH 1/1] suspend: make sync() on suspend-to-RAM optional

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Date:	Tue, 21 Jul 2015 16:41:12 +0200
From:	"Rafael J. Wysocki" <rafael@...nel.org>
To:	Pavel Machek <pavel@....cz>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	"Brown, Len" <len.brown@...el.com>,
	Austin S Hemmelgarn <ahferroin7@...il.com>,
	Len Brown <lenb@...nel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] suspend: make sync() on suspend-to-RAM optional

Hi Pavel,

On Tue, Jul 21, 2015 at 11:38 AM, Pavel Machek <pavel@....cz> wrote:
> On Sat 2015-07-18 01:54:09, Rafael J. Wysocki wrote:
>> On Wednesday, July 15, 2015 02:58:22 PM Brown, Len wrote:

[cut]

>> > >> Why do you need CONFIG parameter?
>> >
>> > So that an OS that doesn't want to change their user-space,
>> > can build a kernel that does what they want by default.
>> >
>> > Originally I had the config parameter remove this code entirely,
>> > which would achieve the same goal.
>> > But Rafael prefers the sysfs attribute always exist
>> > and the config simply set the default.
>>
>> Indeed.
>>
>> And so I'm queuing this patch up for 4.3 (with a couple of minor fixups).
>
> Please don't.
>
> "OS that doesn't want to change the user-space to speed up suspend by
> few milliseconds" is not a valid reason for asking about million users
> one more config question.

That's your opinion and I beg to differ.

> Affected users can't run mainline kernel
> anyway, and will have to change their userland in non-trivial ways to
> get there.

And I'm not sure what you're talking about here.  Who are the
"affected users" in particular?

Rafael
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