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Message-ID: <20171227122523.GC13909@nazgul.tnic> Date: Wed, 27 Dec 2017 13:25:23 +0100 From: Borislav Petkov <bp@...en8.de> To: Baoquan He <bhe@...hat.com> Cc: Jiri Bohac <jbohac@...e.cz>, Toshi Kani <toshi.kani@....com>, David Airlie <airlied@...ux.ie>, Dave Young <dyoung@...hat.com>, joro@...tes.org, kexec@...ts.infradead.org, linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, Bjorn Helgaas <bhelgaas@...gle.com>, Thomas Gleixner <tglx@...utronix.de>, yinghai@...nel.org, Vivek Goyal <vgoyal@...hat.com> Subject: Re: [PATCH v2] x86/kexec: Exclude GART aperture from vmcore On Wed, Dec 27, 2017 at 03:44:49PM +0800, Baoquan He wrote: > > yes, instead of crashing the machine (because GART may be initialized in the > > 2nd kernel, overlapping the 1st kernel memory, which the 2nd kernel with its > > fake e820 map sees as unused). > > > > I'd say this is an improvement. > > I don't get what you said. If 'iommu=off' only specified in 1st kernel, > kdump kernel will think the memory which GART bar pointed as a hole. > This is incorrect. I don't see the improvement. So he says, this memory is unused. Why is that incorrect?!? Wh do I care about dumping unused memory?!?! -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply. --
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