linux-kernel - Re: [PATCH 2.6.23] SysRq: print hotkey info while pressing undef key, try 2

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Message-ID: <20071017221313.GC2156@elf.ucw.cz>
Date:	Thu, 18 Oct 2007 00:13:14 +0200
From:	Pavel Machek <pavel@....cz>
To:	Valdis.Kletnieks@...edu
Cc:	Yi Yang <yang.y.yi@...il.com>, linux-kernel@...r.kernel.org,
	akpm@...l.org, mj@...ey.karlin.mff.cuni.cz,
	crutcher+kernel@...astacks.com, schwab@...e.de
Subject: Re: [PATCH 2.6.23] SysRq: print hotkey info while pressing undef
	key, try 2

Hi!

> > SysRq has already provided a similiar help before this patch, but it
> > is not so clear that the user doesn't know what happened and what
> > he/she should do.
> 
> The person is in one of two states:
> 
> 1) He has been told "recreate the problem, hit alt-sysreq-cokebottle,
> and send me the results".  He has a mission, and the only feedback he
> needs is (a) that he hit cokebottle and not pepsibottle, and (b) the
> resulting output.
> 
> 2) He's already read the file in Documentation/ and just needs a reminder.
> In this case, the fact it's only 2 or 3 lines and doesn't scroll other stuff
> out of sight is more important.
> 
> > In addition, that funtion has a big loop with another big loop
> > embedded which is very inefficient, it is intended to skip some hot
> 
> You're optimizing code that hopefully never gets executed, and even if
> it does, you have the optimization *backwards*.  If you're worried
> about

Pretty much exact. Thanks for saying this so nicely.
									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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