linux-kernel - Re: [PATCH v6 1/2] crash_core, vmcoreinfo: Append 'MAX_PHYSMEM

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Date:   Thu, 2 Jul 2020 20:08:55 +0800
From:   Dave Young <dyoung@...hat.com>
To:     Catalin Marinas <catalin.marinas@....com>
Cc:     Bhupesh Sharma <bhsharma@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Kazuhito Hagio <k-hagio@...jp.nec.com>,
        Will Deacon <will@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>, x86@...nel.org,
        kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Paul Mackerras <paulus@...ba.org>,
        James Morse <james.morse@....com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Boris Petkov <bp@...en8.de>,
        Thomas Gleixner <tglx@...utronix.de>, bhupesh.linux@...il.com,
        linuxppc-dev@...ts.ozlabs.org, Ingo Molnar <mingo@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        Dave Anderson <anderson@...hat.com>
Subject: Re: [PATCH v6 1/2] crash_core, vmcoreinfo: Append 'MAX_PHYSMEM_BITS'
 to vmcoreinfo

Hi Catalin,
On 07/02/20 at 12:00pm, Catalin Marinas wrote:
> On Thu, May 14, 2020 at 12:22:36AM +0530, Bhupesh Sharma wrote:
> > diff --git a/kernel/crash_core.c b/kernel/crash_core.c
> > index 9f1557b98468..18175687133a 100644
> > --- a/kernel/crash_core.c
> > +++ b/kernel/crash_core.c
> > @@ -413,6 +413,7 @@ static int __init crash_save_vmcoreinfo_init(void)
> >  	VMCOREINFO_LENGTH(mem_section, NR_SECTION_ROOTS);
> >  	VMCOREINFO_STRUCT_SIZE(mem_section);
> >  	VMCOREINFO_OFFSET(mem_section, section_mem_map);
> > +	VMCOREINFO_NUMBER(MAX_PHYSMEM_BITS);
> >  #endif
> >  	VMCOREINFO_STRUCT_SIZE(page);
> >  	VMCOREINFO_STRUCT_SIZE(pglist_data);
> 
> I can queue this patch via the arm64 tree (together with the second one)
> but I'd like an ack from the kernel/crash_core.c maintainers. They don't
> seem to have been cc'ed either (only the kexec list).

For the VMCOREINFO part, I'm fine with the changes, but since I do not
understand the arm64 pieces so I would like to leave to arm64 people to
review.  If arm64 bits are good enough, feel free to add:

Acked-by: Dave Young <dyoung@...hat.com>

Thanks
Dave