linux-kernel - Re: [PATCH v6 1/2] x86/kexec: Build identity mapping for EFI systab and ACPI tables

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Date:   Mon, 13 May 2019 16:06:53 +0800
From:   Baoquan He <bhe@...hat.com>
To:     dyoung@...hat.com, Borislav Petkov <bp@...en8.de>
Cc:     j-nomura@...jp.nec.com, kasong@...hat.com,
        fanc.fnst@...fujitsu.com, x86@...nel.org,
        kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
        hpa@...or.com, tglx@...utronix.de
Subject: Re: [PATCH v6 1/2] x86/kexec: Build identity mapping for EFI systab
 and ACPI tables

Hi Dave,

On 05/13/19 at 09:50am, Borislav Petkov wrote:
> On Mon, May 13, 2019 at 03:32:54PM +0800, Baoquan He wrote:
> > This is a critical bug which breaks memory hotplug,
> 
> Please concentrate and stop the blabla:
> 
> 36f0c423552d ("x86/boot: Disable RSDP parsing temporarily")
> 
> already explains what the deal is. This code was *purposefully* disabled
> because we ran out of time and it broke a couple of machines. Don't make

I remember your machine is the one on whihc the issue is reported. Could
you also test it and confirm if these all things found ealier are
cleared out?

Thanks
Baoquan

> me repeat all that - you were on CC on *all* threads and messages!
> 
> So we're going to try it again this cycle and if there's no fallout, it
> will go upstream. If not, it will have to be fixed. The usual thing.
> 
> And I don't care if Kairui's patch fixes this one problem - judging by
> the fragility of this whole thing, it should be hammered on one more
> cycle on as many boxes as possible to make sure there's no other SNAFUs.
> 
> So go test it on more machines instead. I've pushed it here:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/bp/bp.git/log/?h=next-merge-window
> 
> -- 
> Regards/Gruss,
>     Boris.
> 
> Good mailing practices for 400: avoid top-posting and trim the reply.