linux-kernel - Re: [PATCH] x86, calgary: use 8M TCE table size by default

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Message-ID: <20140307141413.GF1326@redhat.com>
Date:	Fri, 7 Mar 2014 09:14:13 -0500
From:	Vivek Goyal <vgoyal@...hat.com>
To:	WANG Chao <chaowang@...hat.com>
Cc:	Muli Ben-Yehuda <muli@...technion.ac.il>,
	"Jon D. Mason" <jdmason@...zu.us>,
	"H. Peter Anvin" <hpa@...or.com>, Baoquan He <bhe@...hat.com>,
	kexec@...ts.infradead.org, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86, calgary: use 8M TCE table size by default

On Fri, Mar 07, 2014 at 04:10:16PM +0800, WANG Chao wrote:

[..]
>  	}
>  
> -	specified_table_size = determine_tce_table_size((is_kdump_kernel() ?
> -					saved_max_pfn : max_pfn) * PAGE_SIZE);
> +	specified_table_size = determine_tce_table_size();

I don't think you can get rid of saved_max_pfn right away. What if
somebody is using old first kernel and new second kernel. Then old kernel
will still be using a table size which is smaller than 8M.

Thanks
Vivek
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