Re: [PATCH 09/16] sparc64: use the generic get_user_pages_fast code
From: Anatoly Pugachev
Date: Thu Jul 25 2019 - 14:33:39 EST
On Wed, Jul 24, 2019 at 11:13 PM David Miller <davem@xxxxxxxxxxxxx> wrote:
> From: Anatoly Pugachev <matorola@xxxxxxxxx>
> Date: Wed, 24 Jul 2019 22:32:17 +0300
> > the first test where it was discovered was done on my test LDOM named
> > ttip, hardware (hypervisor) is T5-2 server, running under Solaris 11.4
> > OS.
> > ttip LDOM is debian sparc64 unstable , so with almost all the latest
> > software (gcc 8.3.0, binutils 220.127.116.1190707-1, debian GLIBC
> > 2.28-10, etc..)
> > For another test, i also installed LDOM with oracle sparc linux
> > https://oss.oracle.com/projects/linux-sparc/ , but I've to install a
> > more fresh version of gcc on it first, since system installed gcc 4.4
> > is too old for a git kernel (linux-2.6/Documentation/Changes lists gcc
> > 4.6 as a minimal version), so I choose to install gcc-7.4.0 to /opt/
> > (leaving system installed gcc 4.4 under /usr/bin). Compiled and
> > installed git kernel version, i.e. last tag 5.3.0-rc1 and ran the
> > test. Kernel still produced oops.
> I suspect, therefore, that we have a miscompile.
> Please put your unstripped vmlinux image somewhere so I can take a closer
there's vmlinuz-5.3.0-rc1 kernel and archive 5.3.0-rc1-modules.tar.gz
this is from oracle sparclinux LDOM , compiled with 7.4.0 gcc