linux-kernel - Re: [PATCH: 2/2] [SERIAL] avoid stalling suspend if serial port won't drain

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Message-ID: <478ACB90.3040709@suspend2.net>
Date:	Mon, 14 Jan 2008 13:40:16 +1100
From:	nigel@...pend2.net
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Pavel Machek <pavel@....cz>,
	Russell King <rmk+lkml@....linux.org.uk>,
	Linux Kernel List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH: 2/2] [SERIAL] avoid stalling suspend if serial port won't
 drain

Hi.

Alan Cox wrote:
>>> Is printk() enough for 'we've just lost your data' condition? Maybe we
>>> should abort suspend if we can't drain fifo?
>> No way. Think about this from a users' perspective. No one wants suspend
>> to ram or hibernate functionality that works sometimes and not others.
>> They want it to work reliably so they don't have to worry about their
>> laptop overheating while they're getting on the bus or airplane.
>> Aborting isn't an option.
> 
> Dumb question on the printk however - what if the port that is sticking
> is the console - don't we recurse and die ?

I don't know, but I'd argue that we shouldn't die. Things should be as
robust as possible.

Regards,

Nigel
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