linux-kernel - Re: [PATCH 1/3] x86, hibernate: Fix nosave

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Message-ID: <alpine.DEB.2.21.1808301441550.1210@nanos.tec.linutronix.de>
Date:   Thu, 30 Aug 2018 14:45:26 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Gu Zhimin <kookoo.gu@...el.com>
cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>, Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, Pavel Machek <pavel@....cz>,
        Yu Chen <yu.c.chen@...el.com>, x86@...nel.org,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] x86, hibernate: Fix nosave_regions setup for
 hibernation

On Mon, 27 Aug 2018, Gu Zhimin wrote:
> 
> Fix this problem by changing pfn limit from max_low_pfn to max_pfn.
> This issue should also exist on 64bits systems, if there are reserved
> regions above 4GB.

Should? Can we please have facts and not some half baken assumptions? 

On 64bit max_low_pfn is the same as max_pfn. See init_mem_mapping().

Thanks,

	tglx