linux-kernel - Re: [PATCH] kexec: unmap reserved pages for each error-return way

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Message-Id: <20160201214540.c0b4b8c2.akpm@linux-foundation.org>
Date:	Mon, 1 Feb 2016 21:45:40 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Dmitry Safonov <dsafonov@...tuozzo.com>
Cc:	Minfei Huang <mhuang@...hat.com>, <linux-kernel@...r.kernel.org>,
	<schwidefsky@...ibm.com>, <heiko.carstens@...ibm.com>,
	<ebiederm@...ssion.com>, <linux-s390@...r.kernel.org>,
	<0x7f454c46@...il.com>, <kexec@...ts.infradead.org>,
	<holzheu@...ux.vnet.ibm.com>, <dyoung@...hat.com>
Subject: Re: [PATCH] kexec: unmap reserved pages for each error-return way

On Thu, 28 Jan 2016 11:57:22 +0300 Dmitry Safonov <dsafonov@...tuozzo.com> wrote:

> On 01/28/2016 09:29 AM, Minfei Huang wrote:
> > On 01/27/16 at 02:48pm, Dmitry Safonov wrote:
> >> For allocation of kimage failure or kexec_prepare or load segments
> >> errors there is no need to keep crashkernel memory mapped.
> >> It will affect only s390 as map/unmap hook defined only for it.
> >> As on unmap s390 also changes os_info structure let's check return code
> >> and add info only on success.
> > Hi, Dmitry.
> >
> > Previously, I sent a patch to fix this issue. You can refer it in
> > following link.
> >
> > http://lists.infradead.org/pipermail/kexec/2015-July/013960.html
> Oh, scratch my patch - I'm fine with yours, wanted to do the similar thing
> because it has dazzled me while I was debugging around.

There were a bunch of patches tossed around in that thread but I'm not
sure that anything actually got applied?  Perhaps some resending is
needed.