----- Original Message -----
>
>
> ----- Original Message -----
> > Hi Dave,
> >
> > I captured a crash of F20 beta system and opened vmcore. crash gives me
> > warning that log_buf has changed and "log" command does not output
> > anything.
> >
> > I thought you fixed it. Is it just a problem of pushing crash update
> > to F20?
Also, what version of crash are you using? The fix for the structure name change
from "log" to "printk_log" went into crash-7.0.2. I'm not sure
whether that made
it into f20 from rawhide, or if f20 is still sitting at crash-7.0.1.
Dave
Sorry, I didn't check the output below -- it's still at 7.0.1-2.fc20.
Can you file a Fedora BZ, and when it opens for bug fixes, I'll push
it out.
Until then, you can get the Rawhide version here:
Information for build crash-7.0.3-1.fc21
> I did, but as part of it, there's also this check for further changes:
>
> /*
> * If things change, don't kill a dumpfile session
> * searching for a panic message.
> */
> if (INVALID_SIZE(log) ||
> INVALID_MEMBER(log_ts_nsec) ||
> INVALID_MEMBER(log_len) ||
> INVALID_MEMBER(log_text_len) ||
> INVALID_MEMBER(log_dict_len) ||
> (INVALID_MEMBER(log_level) &&
> INVALID_MEMBER(log_flags_level)) ||
> !kernel_symbol_exists("log_buf_len") ||
> !kernel_symbol_exists("log_buf")) {
> error(WARNING, "\nlog buf data structure(s) have
> changed\n");
> return;
> }
>
> Is the system still available, or do you have a vmcore from that kernel?
>
> Dave
>
>
>
> > Thanks
> > Vivek
> >
> > # crash /usr/lib/debug/lib/modules/3.11.8-300.fc20.x86_64/vmlinux vmcore
> >
> > crash 7.0.1-2.fc20
> > Copyright (C) 2002-2013 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"...
> >
> > KERNEL: /usr/lib/debug/lib/modules/3.11.8-300.fc20.x86_64/vmlinux
> > DUMPFILE: vmcore [PARTIAL DUMP]
> > CPUS: 4
> > DATE: Tue Nov 19 16:33:43 2013
> > UPTIME: 00:03:24
> > LOAD AVERAGE: 0.18, 0.37, 0.18
> > TASKS: 172
> > NODENAME: <Edited>
> > RELEASE: 3.11.8-300.fc20.x86_64
> > VERSION: #1 SMP Wed Nov 13 16:34:27 UTC 2013
> > MACHINE: x86_64 (2333 Mhz)
> > MEMORY: 4 GB
> > PANIC:
> > WARNING: log buf data structure(s) have changed
> > ""
> > PID: 10584
> > COMMAND: "bash"
> > TASK: ffff8801371d96e0 [THREAD_INFO: ffff880138dd8000]
> > CPU: 3
> > STATE: TASK_RUNNING (PANIC)
> >
> > crash> log
> >
> > log: WARNING: log buf data structure(s) have changed
> >
>