Hello, I'm having a problem using crash on cores generated by upstream kernels (in this case 2.6.20). I'm using crash 4.0-3.20, and I've built my kernel with -g. Whenever I try to open it this is the error I get [root@rh5cluster2 127.0.0.1-2007-02-23-15:09:25]# crash /root/linux-2.6/vmlinux vmcore crash 4.0-3.20 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Red Hat, Inc. Copyright (C) 2004, 2005, 2006 IBM Corporation Copyright (C) 1999-2006 Hewlett-Packard Co Copyright (C) 2005, 2006 Fujitsu Limited Copyright (C) 2006 VA Linux Systems Japan K.K. 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 "i686-pc-linux-gnu"... crash: invalid (optional) structure member offsets: zone_struct_free_pages or zone_free_pages FILE: memory.c LINE: 11520 FUNCTION: dump_memory_nodes() [/usr/bin/crash] error trace: 8096dcc => 80baca0 => 80ba076 => 812ee1a /usr/bin/nm: /usr/bin/crash: no symbols /usr/bin/nm: /usr/bin/crash: no symbols /usr/bin/nm: /usr/bin/crash: no symbols /usr/bin/nm: /usr/bin/crash: no symbols WARNING: Because this kernel was compiled with gcc version 4.1.1, certain commands or command options may fail unless crash is invoked with the "--readnow" command line option. [root@rh5cluster2 127.0.0.1-2007-02-23-15:09:25]# file vmcore vmcore: ELF 32-bit LSB core file Intel 80386, version 1 (SYSV), SVR4-style the file is definitely a proper core. I used the --readnow option and that did not help either. Thank you,

On Fri, Feb 23, 2007 at 04:00:09PM -0500, Dave Anderson wrote: > if you do this with your kernel: > > # gdb vmlinux > ... > (gdb) ptype struct zone > > What do you see? > (gdb) ptype struct zone type = struct zone { long unsigned int pages_min; long unsigned int pages_low; long unsigned int pages_high; long unsigned int lowmem_reserve[3]; struct per_cpu_pageset pageset[32]; spinlock_t lock; struct free_area free_area[11]; struct zone_padding _pad1_; spinlock_t lru_lock; struct list_head active_list; struct list_head inactive_list; long unsigned int nr_scan_active; long unsigned int nr_scan_inactive; long unsigned int pages_scanned; int all_unreclaimable; atomic_t reclaim_in_progress; atomic_long_t vm_stat[14]; int prev_priority; struct zone_padding _pad2_; wait_queue_head_t *wait_table; long unsigned int wait_table_hash_nr_entries; long unsigned int wait_table_bits; struct pglist_data *zone_pgdat; long unsigned int zone_start_pfn; long unsigned int spanned_pages; long unsigned int present_pages; const char *name; } It looks like free_pages has been removed altogether.

On Fri, Feb 23, 2007 at 04:19:37PM -0500, Dave Anderson wrote: > Josef Whiter wrote: > > > On Fri, Feb 23, 2007 at 04:00:09PM -0500, Dave Anderson wrote: > > > if you do this with your kernel: > > > > > > # gdb vmlinux > > > ... > > > (gdb) ptype struct zone > > > > > > What do you see? > > > > > > > (gdb) ptype struct zone > > type = struct zone { > > long unsigned int pages_min; > > long unsigned int pages_low; > > long unsigned int pages_high; > > long unsigned int lowmem_reserve[3]; > > struct per_cpu_pageset pageset[32]; > > spinlock_t lock; > > struct free_area free_area[11]; > > struct zone_padding _pad1_; > > spinlock_t lru_lock; > > struct list_head active_list; > > struct list_head inactive_list; > > long unsigned int nr_scan_active; > > long unsigned int nr_scan_inactive; > > long unsigned int pages_scanned; > > int all_unreclaimable; > > atomic_t reclaim_in_progress; > > atomic_long_t vm_stat[14]; > > int prev_priority; > > struct zone_padding _pad2_; > > wait_queue_head_t *wait_table; > > long unsigned int wait_table_hash_nr_entries; > > long unsigned int wait_table_bits; > > struct pglist_data *zone_pgdat; > > long unsigned int zone_start_pfn; > > long unsigned int spanned_pages; > > long unsigned int present_pages; > > const char *name; > > } > > > > It looks like free_pages has been removed altogether. > > That appears to be a very recent change -- 2.6.20.1 still has it: > > struct zone { > /* Fields commonly accessed by the page allocator */ > unsigned long free_pages; > unsigned long pages_min, pages_low, pages_high; > ... > > What version are you using? Are you running 2.6.21-rc1? > No, I pulled linus's git tree down maybe a week ago, so its close to -rc1. Josef