[Crash-utility] crash seek error, failed to read vmcore file

Hi Everyone, We are facing a problem while analysing the vmcore on PPC64 systems running SLES11 SP1. =============== please wait... (gathering kmem slab cache data) crash: seek error: kernel virtual address: c0000000af715480 type: "kmem_cache buffer" crash: unable to initialize kmem slab cache subsystem please wait... (gathering module symbol data) WARNING: cannot access vmalloc'd module memory please wait... (gathering task table data) crash: cannot read pid_hash upid crash: cannot read pid_hash upid crash: cannot read pid_hash upid ===================== Version: crash-5.0.3 Command used: #crash vmlinux-2.6.32.10-0.4.99.25.62005-ppc64.debug vmlinux-2.6.32.10-0.4.99.25.62005-ppc64 vmcore Attaching the output of the above command.. Using crash -d8 for above command, ======================== <snip> <readmem: c00000000134ffa0, KVADDR, "memory section", 32, (FOE), 122f94b0> addr: c00000000134ffa0 paddr: 134ffa0 cnt: 32 <readmem: c00000000134ffc0, KVADDR, "memory section", 32, (FOE), 122f94b0> addr: c00000000134ffc0 paddr: 134ffc0 cnt: 32 <readmem: c00000000134ffe0, KVADDR, "memory section", 32, (FOE), 122f94b0> addr: c00000000134ffe0 paddr: 134ffe0 cnt: 32 NOTE: page_hash_table does not exist in this kernel please wait... (gathering kmem slab cache data)<readmem: c0000000012fc718, KVADDR, "cache_chain", 8, (FOE), fffeff7f108> addr: c0000000012fc718 paddr: 12fc718 cnt: 8 GETBUF(248 -> 1) FREEBUF(1) GETBUF(10344 -> 1) <readmem: c000000000d8af90, KVADDR, "kmem_cache buffer", 10344, (FOE), 1082f5d8> addr: c000000000d8af90 paddr: d8af90 cnt: 10344 GETBUF(248 -> 2) FREEBUF(2) FREEBUF(1) GETBUF(10344 -> 1) <readmem: c0000000af715480, KVADDR, "kmem_cache buffer", 10344, (ROE), 1082f5d8> addr: c0000000af715480 paddr: af715480 cnt: 10344 crash: seek error: kernel virtual address: c0000000af715480 type: "kmem_cache buffer" FREEBUF(1) crash: unable to initialize kmem slab cache subsystem ================================= NOTE: Crash was able to read a vmcore on the same system that was manually generated using: echo c > /proc/sysrq-trigger. Thanks.. Pavan