linux-kernel - Re: [Patch 5/8] ia64: implement crashkernel=auto

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Date:	Mon, 24 Aug 2009 10:05:49 +0800
From:	Amerigo Wang <amwang@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, tony.luck@...el.com,
	linux-ia64@...r.kernel.org, nhorman@...hat.com,
	ebiederm@...ssion.com, andi@...stfloor.org, bernhard.walle@....de,
	fenghua.yu@...el.com, kamezawa.hiroyu@...fujitsu.com,
	avorontsov@...mvista.com
Subject: Re: [Patch 5/8] ia64: implement crashkernel=auto

Ingo Molnar wrote:
>
> e) All the 'else' statements are superflous and make it all harder 
>    to read.
>
> f) 2ULL<<30 should be written as 1ULL<31, to keep things consistent.
>   

Hi,

The reason that I kept 2ULL<<30 instead of 1ULL<<31 is that '1<<30' is 
exactly 1G, so 2ULL<<30 can be easily read as 2G. ;)

> g) A nice comment explaining the purpose and logic wouldnt hurt.
>   

Yup, in fact patch 8/8 has the doc for this, but I will copy that here 
as a comment too.

Thanks!

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