9:58 a.m.
----- Original Message -----
> Hi,
>
> I'm trying to use the latest crash via the git repo, on the just
> released linux-4.9-rc1 kernel, and I'm hitting this failure when loading
> the vmcore. Any ideas?
Apparently the 4.9 thread_info structure no longer has a "cpu" member?
Dave
Hi Steve,
It's all due to the 4.9 introduction of CONFIG_THREAD_INFO_IN_TASK:
commit 15f4eae70d365bba26854c90b6002aaabb18c8aa
Author: Andy Lutomirski <luto(a)kernel.org>
Date: Tue Sep 13 14:29:25 2016 -0700
x86: Move thread_info into task_struct
Now that most of the thread_info users have been cleaned up,
this is straightforward.
Most of this code was written by Linus.
Originally-from: Linus Torvalds <torvalds(a)linux-foundation.org>
Signed-off-by: Andy Lutomirski <luto(a)kernel.org>
Cc: Borislav Petkov <bp(a)alien8.de>
Cc: Brian Gerst <brgerst(a)gmail.com>
Cc: Denys Vlasenko <dvlasenk(a)redhat.com>
Cc: H. Peter Anvin <hpa(a)zytor.com>
Cc: Jann Horn <jann(a)thejh.net>
Cc: Josh Poimboeuf <jpoimboe(a)redhat.com>
Cc: Linus Torvalds <torvalds(a)linux-foundation.org>
Cc: Peter Zijlstra <peterz(a)infradead.org>
Cc: Thomas Gleixner <tglx(a)linutronix.de>
Link:
http://lkml.kernel.org/r/a50eab40abeaec9cb9a9e3cbdeafd32190206654.1473801...
Signed-off-by: Ingo Molnar <mingo(a)kernel.org>
commit c65eacbe290b8141554c71b2c94489e73ade8c8d
Author: Andy Lutomirski <luto(a)kernel.org>
Date: Tue Sep 13 14:29:24 2016 -0700
sched/core: Allow putting thread_info into task_struct
If an arch opts in by setting CONFIG_THREAD_INFO_IN_TASK_STRUCT,
then thread_info is defined as a single 'u32 flags' and is the first
entry of task_struct. thread_info::task is removed (it serves no
purpose if thread_info is embedded in task_struct), and
thread_info::cpu gets its own slot in task_struct.
This is heavily based on a patch written by Linus.
Originally-from: Linus Torvalds <torvalds(a)linux-foundation.org>
Signed-off-by: Andy Lutomirski <luto(a)kernel.org>
Cc: Borislav Petkov <bp(a)alien8.de>
Cc: Brian Gerst <brgerst(a)gmail.com>
Cc: Denys Vlasenko <dvlasenk(a)redhat.com>
Cc: H. Peter Anvin <hpa(a)zytor.com>
Cc: Jann Horn <jann(a)thejh.net>
Cc: Josh Poimboeuf <jpoimboe(a)redhat.com>
Cc: Linus Torvalds <torvalds(a)linux-foundation.org>
Cc: Peter Zijlstra <peterz(a)infradead.org>
Cc: Thomas Gleixner <tglx(a)linutronix.de>
Link:
http://lkml.kernel.org/r/a0898196f0476195ca02713691a5037a14f2aac5.1473801...
Signed-off-by: Ingo Molnar <mingo(a)kernel.org>
commit d896fa20a70c9e596438728561e058a74ed3196b
Author: Linus Torvalds <torvalds(a)linux-foundation.org>
Date: Tue Sep 13 14:29:23 2016 -0700
um/Stop conflating task_struct::stack with thread_info
thread_info may move in the future, so use the accessors.
[ Andy Lutomirski wrote this changelog message and changed
"task_thread_info(child)->cpu" to "task_cpu(child)". ]
Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org>
Signed-off-by: Andy Lutomirski <luto(a)kernel.org>
Cc: Borislav Petkov <bp(a)alien8.de>
Cc: Brian Gerst <brgerst(a)gmail.com>
Cc: Denys Vlasenko <dvlasenk(a)redhat.com>
Cc: H. Peter Anvin <hpa(a)zytor.com>
Cc: Jann Horn <jann(a)thejh.net>
Cc: Josh Poimboeuf <jpoimboe(a)redhat.com>
Cc: Peter Zijlstra <peterz(a)infradead.org>
Cc: Thomas Gleixner <tglx(a)linutronix.de>
Link:
http://lkml.kernel.org/r/3439705d9838940cc82733a7335fa8c654c37db8.1473801...
Signed-off-by: Ingo Molnar <mingo(a)kernel.org>
You don't have a configuration choice with x86, as it appears it's an
architecture
requirement. It's a fairly significant intrusion w/respect to the crash utility,
so you're pretty much out of luck, for now anyway.
Any chance you can make your vmlinux/vmcore pair available for me to download?
Dave
> My crash git HEAD is:
>
> commit 64531dc850f2840cedafa143fe051d2cfeae5247
> Author: Dave Anderson <anderson(a)redhat.com>
> Date: Thu Oct 13 14:32:43 2016 -0400
>
> crash-7.1.5 -> crash-7.1.6
>
> [root@stevo1 crash]# ./crash /usr/local/src/linux-2.6/vmlinux
> /var/crash/127.0.0.1-2016-10-17-02\:12\:50/vmcore
>
>
> crash 7.1.6
> Copyright (C) 2002-2016 Red Hat, Inc.
> Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation
> Copyright (C) 1999-2006 Hewlett-Packard Co
> Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited
> Copyright (C) 2006, 2007 VA Linux Systems Japan K.K.
> Copyright (C) 2005, 2011 NEC Corporation
> Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc.
> Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc.
> This program is free software, covered by the GNU General Public License,
> and you are welcome to change it and/or distribute copies of it under
> certain conditions. Enter "help copying" to see the conditions.
> This program has absolutely no warranty. Enter "help warranty" for
> details.
>
> GNU gdb (GDB) 7.6
> Copyright (C) 2013 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later
> <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law. Type "show
copying"
> and "show warranty" for details.
> This GDB was configured as "x86_64-unknown-linux-gnu"...
>
> crash: cannot determine thread return address
> please wait... (gathering task table data)
> crash: invalid structure member offset: thread_info_cpu
> FILE: task.c LINE: 2364 FUNCTION: store_context()
>
> [./crash] error trace: 4caf3c => 4c3010 => 4bbac6 => 51da6d
>
> 51da6d: OFFSET_verify+189
> 4bbac6: store_context+1030
> 4c3010: refresh_hlist_task_table_v3+2256
> 4caf3c: task_init+3724
>
> [root@stevo1 crash]#
>
>
> Thanks,
>
>
> Steve.
>
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