On Fri, 2006-04-28 at 08:25 -0400, Dave Anderson wrote:
 Badari Pulavarty wrote:
 
 > Dave Anderson wrote:
 >
 > >
 > > changes the pid_hash chain from:
 > >
 > >   static struct hlist_head *pid_hash[PIDTYPE_MAX];
 > >
 > > to:
 > >
 > >   static struct hlist_head *pid_hash;
 > >
 > > The pid_hash infrastructure is what the crash utility
 > > uses to gather the set of running tasks during initialization.
 > > The change above breaks it, and crash will fail with an
 > > error message stating:
 > >
 > >   crash: cannot determine pid_hash array dimensions
 > >
 > > As the PID handling has changed over the years, there have
 > > been several task-gathering functions in crash, the latest
 > > of which is refresh_hlist_task_table().  I don't know whether
 > > it will be possible to shoe-horn the new scheme to fit this
 > > current crash function, or whether yet another new one will
 > > have to be written.  If it's the latter, it may take a while...
 > >
 >
 > Well, its not the only one we need to deal with on 2.6.17-rc2  :(
 >
 > elm3a242:~/crash-4.0-2.23 # ./crash
 > crash 4.0-2.23
 > Copyright (C) 2002, 2003, 2004, 2005, 2006  Red Hat, Inc.
 > Copyright (C) 2004, 2005, 2006  IBM Corporation
 > Copyright (C) 1999-2006  Hewlett-Packard Co
 > Copyright (C) 2005  Fujitsu Limited
 > Copyright (C) 2005  NEC Corporation
 > Copyright (C) 1999, 2002  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 6.1
 > Copyright 2004 Free Software Foundation, Inc.
 > GDB 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.
 > Type "show copying" to see the conditions.
 > There is absolutely no warranty for GDB.  Type "show warranty" for
details.
 > This GDB was configured as "x86_64-unknown-linux-gnu"...
 >
 > crash: cannot resolve: "pgdat_list"
 >
 
 Yep, Vivek and I ran into that yesterday -- and I've fixed that issue.
 And support for the intro of the new pid_hash/pid_link scheme is
 looking pretty good.
  
Yes. I looked at it yesterday. I think we can work those out into
current scheme (without major surgery). I was just trying to understand
the kernel changes and the crash code. I haven't made any changes yet
(given that you are working on it). If you need a hand, let me know.
Thanks,
Badari