linux-kernel - Re: [PATCH] efi: Fix the size not consistent issue when unmapping memory map

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Date:   Tue, 17 Apr 2018 09:20:48 +0800
From:   joeyli <jlee@...e.com>
To:     Randy Wright <rwright@....com>
Cc:     "Lee, Chun-Yi" <joeyli.kernel@...il.com>,
        linux-efi@...r.kernel.org,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Takashi Iwai <tiwai@...e.de>, kexec@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        akpm@...ux-foundation.org, Vivek Goyal <vgoyal@...hat.com>,
        Dave Young <dyoung@...hat.com>
Subject: Re: [PATCH] efi: Fix the size not consistent issue when unmapping
 memory map

On Mon, Apr 16, 2018 at 06:35:22PM -0600, Randy Wright wrote:
> On Mon, Apr 16, 2018 at 02:37:38PM +0800, joeyli wrote:
> > Hi Randy,
> > ...
> > Randy, do you want to try Dave's kexec patch on your environment? Please remove
> > my patch first.  
> > 
> > Thanks a lot!
> > Joey Lee
> 
> Hi Joey, 
> 
> I tried Dave's patch to kexec-bzimage64.c on my build of the SuSE
> 4.12.14-15 kernel.   I ran the same test as I did with your patch: I
> verified the early_ioremap.c warnings occurred with a crash triggered
> from a kexec boot of the unmodified kernel. Then I applied the patch to
> kexec-bzimage64.c, rebuilt, re-ran the test to crash from the kexec'ed
> kernel, and verified the warnings are no longer seen.
>

Thanks for your help! Looks that Dave's kexec patch works to prevent the
warning message. 
 
> I'm out of time today, but I will plan to run the same  test tomorrow on
> a build of the SuSE 4.4.120-94.17 kernel, on which I had also reported
> the original bug.
>

Both kexec and efi sides will be applied patches.

Thanks a lot!
Joey Lee