Re: [PATCH v4 0/3] Append new variables to vmcoreinfo (TCR_EL1.T1SZ for arm64 and MAX_PHYSMEM_BITS for all archs)

From: Prabhakar Kushwaha <prabhakar.pkin@gmail.com>
To: AKASHI Takahiro <takahiro.akashi@linaro.org>,
	Bhupesh Sharma <bhsharma@redhat.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Bhupesh SHARMA <bhupesh.linux@gmail.com>,
	Boris Petkov <bp@alien8.de>, Ingo Molnar <mingo@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Jonathan Corbet <corbet@lwn.net>,
	James Morse <james.morse@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Will Deacon <will@kernel.org>,
	Steve Capper <steve.capper@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Paul Mackerras <paulus@samba.org>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Dave Anderson <anderson@redhat.com>,
	Kazuhito Hagio <k-hagio@ab.jp.nec.com>,
	x86@kernel.org, linuxppc-dev@lists.ozlabs.org,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	Linux Doc Mailing List <linux-doc@vger.kernel.org>,
	kexec mailing list <kexec@lists.infradead.org>
Subject: Re: [PATCH v4 0/3] Append new variables to vmcoreinfo (TCR_EL1.T1SZ for arm64 and MAX_PHYSMEM_BITS for all archs)
Date: Tue, 19 Nov 2019 12:02:46 +0530	[thread overview]
Message-ID: <CAJ2QiJJOSspLKRh+jRB_o0o9nmeAsiFKzxGJ8R0pYPRM4iptmw@mail.gmail.com> (raw)
In-Reply-To: <20191115015959.GI22427@linaro.org>

Hi Akashi,

On Fri, Nov 15, 2019 at 7:29 AM AKASHI Takahiro
<takahiro.akashi@linaro.org> wrote:
>
> Bhupesh,
>
> On Fri, Nov 15, 2019 at 01:24:17AM +0530, Bhupesh Sharma wrote:
> > Hi Akashi,
> >
> > On Wed, Nov 13, 2019 at 12:11 PM AKASHI Takahiro
> > <takahiro.akashi@linaro.org> wrote:
> > >
> > > Hi Bhupesh,
> > >
> > > Do you have a corresponding patch for userspace tools,
> > > including crash util and/or makedumpfile?
> > > Otherwise, we can't verify that a generated core file is
> > > correctly handled.
> >
> > Sure. I am still working on the crash-utility related changes, but you
> > can find the makedumpfile changes I posted a couple of days ago here
> > (see [0]) and the github link for the makedumpfile changes can be seen
> > via [1].
> >
> > I will post the crash-util changes shortly as well.
> > Thanks for having a look at the same.
>
> Thank you.
> I have tested my kdump patch with a hacked version of crash
> where VA_BITS_ACTUAL is calculated from tcr_el1_t1sz in vmcoreinfo.
>

I also did hack to calculate VA_BITS_ACTUAL is calculated from
tcr_el1_t1sz in vmcoreinfo. Now i am getting error same as mentioned
by you in other thread last month.
https://www.mail-archive.com/crash-utility@redhat.com/msg07385.html

how this error was overcome?

I am using
 - crashkernel: https://github.com/crash-utility/crash.git  commit:
babd7ae62d4e8fd6f93fd30b88040d9376522aa3
and
 - Linux: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
commit: af42d3466bdc8f39806b26f593604fdc54140bcb

--pk