linux-kernel - Re: [Xen-devel] incorrect layout of globals from head

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Message-ID: <20120717123418.GA28781@aepfle.de>
Date:	Tue, 17 Jul 2012 14:34:18 +0200
From:	Olaf Hering <olaf@...fle.de>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:	Keir Fraser <keir.xen@...il.com>, xen-devel@...ts.xensource.com,
	kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Jan Beulich <JBeulich@...e.com>,
	Daniel Kiper <dkiper@...-space.pl>
Subject: Re: [Xen-devel] incorrect layout of globals from head_64.S during
 kexec boot

On Tue, Jul 17, Olaf Hering wrote:

To make this robust against allocation errors I will change it to

       do {

> +	/* Allocate new mfn for previous pfn */
> +	rc = HYPERVISOR_memory_op(XENMEM_populate_physmap, &reservation);

       } while (rc == 0);

> +
> +	/* Make sure the previous pfn is really connected to a (new) mfn */
> +	BUG_ON(rc != 1);

Olaf
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