linux-kernel - Re: [RFD] Freezing of kernel threads

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Date:	Sat, 12 May 2007 12:40:40 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Pavel Machek <pavel@....cz>
cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Gautham R Shenoy <ego@...ibm.com>,
	Oleg Nesterov <oleg@...sign.ru>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFD] Freezing of kernel threads



On Sat, 12 May 2007, Pavel Machek wrote:
> 
> If you fail to do that, we'll see freezer failure, quickly, and catch
> the simple bug.

"It's a feature to add crap to drivers and subsystems that don't care!"

That's a novel thing.

Maybe we could add other features too. Like a "IM_NOT_AN_IDIOT" flag that 
every driver has to set in it's "struct device", so that the device 
manager knows that it wasn't written by an idiot.

> I'm afraid that if we default to "do not freeze by default", someone
> will just port zfs, will know nothing about suspend, and his 
> "write management info somewhere periodically" thread will corrupt
> people's disks.

Right. That's what the IM_NOT_AN_IDIOT thing will do too - it will 
guarantee that only smart people do the right thing.

Great idea. We'll get a better kernel in no tim!

		Linus
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