Hi John,
On Tue, Oct 22, 2019 at 12:47 AM John Donnelly
<john.p.donne...@oracle.com> wrote:
>
> Hi Bhupesh
>
> > On Oct 21, 2019, at 1:53 PM, Bhupesh Sharma <bhsha...@redhat.com> wrote:
> >
> > Hello John,
> >
> > On Mon, Oct 21, 2019 at 9:39 PM John Donnelly
> > <john.p.donne...@oracle.com> wrote:
> >>
> >>
> >>
> >> Hello,
> >>
> >>
> >> Kazuhito Hagio asked me to share my test results on this patch for
> >> makedumpfile :
> >>
> >>
> >> https://urldefense.proofpoint.com/v2/url?u=https-3A__sourceforge.net_p_makedumpfile_code_ci_7bdb468c2c99dd780c9a5321f93c79cbfdce2527_&d=DwICAg&c=RoP1YumCXCgaWHvlZYR8PZh8Bv7qIrMUB65eapI_JnE&r=t2fPg9D87F7D8jm0_3CG9yoiIKdRg4qc_thBw4bzMhc&m=UkLq9rpRCDj7DqKa-5dVlvS7yMZxB7jvNd9aGutvEu0&s=d9TLmOPVO4PFtvcFwVOeZRcMg0UOmy04XdgztVxXWyg&e=
> >>
> >> And I was successfully able to get vmcore dumps on vmlinuz-5.3.6 and
> >> 5.4.0-rc3 Intel ( x86-64) kernels.
> >>
> >> I am still having difficulties getting vmcores on 5.4.0.rc3 Arm kernels
> >> with this update to makedumpfile.
> >>
> >> I get this message;
> >>
> >>
> >> Buffer size for the cyclic mode: 3145728
> >> va_bits : 47
> >> page_offset : ffffc00000000000
> >> calculate_plat_config: PAGE SIZE 0x10000 and VA Bits 47 not supported
> >> get_machdep_info_arm64: Can't determine platform config values
> >>
> >> makedumpfile Failed.
> >>
> >>
> >> Any suggestions welcomed
> >
> > I am working on the changes in the vmcoreinfo after the 52-bit VA
> > changes from Steve were accepted in Linux 5.4-rc1 ("Support for 52-bit
> > virtual addressing in kernel space”).
>
>
> I don’t see a commit with this title in linux-stable ; Could you be a
> little more specific what file that was applied to ?
You can have a look at the following commit (and dependencies) in
Linus's tree (git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git)
which introduced 52-bit kernel VAs for arm64 architecture:
commit b6d00d47e81a49f6cf462518c10408f37a3e6785
Author: Steve Capper <steve.cap...@arm.com>
Date: Wed Aug 7 16:55:22 2019 +0100
arm64: mm: Introduce 52-bit Kernel VAs
Thanks,
Bhupesh
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