----- "Laurence A. Oberman" <online@xxxxxxxxxxxxxxx> wrote: > Hi Dave > > I use crash all the time on SLES dumps. I still have problems with the > SLAB stuff, even with 5.0. > > "crash: unable to initialize kmem slab cache subsystem" > > Is there a fix for this or am I missing something in creating the > debug vmlinux kernel > > crash 5.0.0 > Copyright (C) 2002-2010 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, 2007 VA Linux Systems Japan K.K. > Copyright (C) 2005 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) 7.0 > Copyright (C) 2009 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"... > > WARNING: could not find MAGIC_START! > please wait... (gathering kmem slab cache data)\ > crash: seek error: kernel virtual address: 1082fffea00 type: "kmem_cache buffer" ----> > > crash: unable to initialize kmem slab cache subsystem > > SYSTEM MAP: map.0 > DEBUG KERNEL: vmlinux (2.6.5-7.244-smp) > DUMPFILE: dump.0 > CPUS: 4 > DATE: Sat Feb 6 12:43:37 2010 > UPTIME: 213503982289 days, 20:38:24 > LOAD AVERAGE: 260.75, 259.77, 258.95 > TASKS: 1167 > NODENAME: linuscs73 > RELEASE: 2.6.5-7.252-smp > VERSION: #2 SMP Mon Jun 22 13:11:57 PDT 2009 > MACHINE: x86_64 (2666 Mhz) > MEMORY: 32.7 GB > PANIC: "manual" > PID: 8741 > COMMAND: "lkcd_config" > TASK: 107ed5d6b40 [THREAD_INFO: 1024f3ac000] > CPU: 2 > STATE: TASK_RUNNING (PANIC) > > > Thanks > Laurence The "seek error" indicates that the kmem slab page associated with virtual address 1082fffea00, which is unity-mapped to physical address 82fffea00, could not be found in the dump.0 file. If we presume that it is a "correct" address, physical address 82fffea00 is *very* close to the end of physical memory on that system, which shows "32.7 GB". If you enter: crash> kmem -p | tail and wait a while because of the size of the dump, it will eventually dump the end of the system's mem_map array of physical pages, where the second column in the list contains the physical address. I only have one SLES9 (2.6.5-7.315-smp) dumpfile example, which is a 16GB dumpfile, and the output looks like this: crash> kmem -p | tail 10407efdd98 407ff5000 0 0 0 d000080 10407efddd0 407ff6000 0 0 0 d000080 10407efde08 407ff7000 0 0 0 d000080 10407efde40 407ff8000 0 0 0 d000080 10407efde78 407ff9000 0 0 0 d000080 10407efdeb0 407ffa000 0 0 0 d000080 10407efdee8 407ffb000 0 0 0 d000080 10407efdf20 407ffc000 0 0 0 d000080 10407efdf58 407ffd000 0 0 0 d000080 10407efdf90 407ffe000 0 0 0 d000080 crash> where 407ffe000 is the last page of physical memory on the system. If you do the same thing, how does the last physical page compare to 82fffea00? Dave output looks like this -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
