linux-kernel - Re: [PATCH 1/2] kdump: Allow shrinking of kdump region to be overridden

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Message-ID: <AANLkTi=aDzCaa7_=5XTrnJCzmZPrDy3omXwDarEF8XmH@mail.gmail.com>
Date:	Tue, 15 Mar 2011 15:52:38 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	mahesh@...ux.vnet.ibm.com
Cc:	Anton Blanchard <anton@...ba.org>, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	akpm@...ux-foundation.org
Subject: Re: [PATCH 1/2] kdump: Allow shrinking of kdump region to be overridden

On Tue, Mar 15, 2011 at 2:13 AM, Mahesh J Salgaonkar
<mahesh@...ux.vnet.ibm.com> wrote:
>
> During free we do free all of them including RMO region. But since the rtas
> region is always on top of RMO, crashkernel memory overlaps rtas region and
> we endup freeing that even, which is causing the crash.
>

Okay, but with this patch applied, we will just ignore rtas region, right?
Thus, when I echo 0 to free all the 128M crashkernel memory, the final
result will be 32M left, which means crash_size will still show 32M.
This looks odd.

How about skipping the 32M as a whole? I mean once the region being freed
has overlap with this rtas region, skip the whole rtas region, and let
crash_size
show 0?

Thanks.
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