Hi Jay, Thank you for testing and the report. It is good that a new makedumpfile shrinks its running time. But does it create a unreadable dumpfile ? OK, I want to reproduce/investigate the problem. Could you please send me your .config file ? I have not tested makedumpfile on IA64 linux-2.6.27-rcX yet, because IA64 linux-2.6.27-rcX kernel gets a panic while booting. So I guess that there is some thing wrong in my .config file. I'll be on vacation the next week, and I'll start investigating it the week after next (9/24). Thanks Ken'ichi Ohmichi Jay Lan wrote: > After getting around a few kdump kernel panic/hang, i finally was > able to complete a kdump vmcore with 2.6.27-rc5. The system under > testing was an IA64 with 128 cpu and 256G memory A4700 system. > > The /proc/vmcore is: > a4700rac:/boot # ll /proc/vmcore > -r-------- 1 root root 263006257684 2008-09-10 14:45 /proc/vmcore > a4700rac:/boot # ls -lh /proc/vmcore > -r-------- 1 root root 245G 2008-09-10 14:44 /proc/vmcore > > Time spent in saving the vmcore using cp was 7 min 17 sec: > > a4700rac:/boot # date; cp /proc/vmcore /mnt/sda9/diskdump/vmcore-cp; date > Wed Sep 10 14:34:18 PDT 2008 > Wed Sep 10 14:41:35 PDT 2008 > > Time spent with 'makedumpfile -c -d31' was 1 min 40 sec: > > a4700rac:/boot # date; makedumpfile -c -d31 -x > /boot/vmlinux-2.6.27-rc5-default /proc/vmcore > /mnt/sda9/diskdump/vmcore-2.6.27-rc5-default; date > Wed Sep 10 14:31:56 PDT 2008 > Can't distinguish the pgtable. > The kernel version is not supported. > The created dumpfile may be incomplete. > Copying data : [100 %] > > The dumpfile is saved to /mnt/sda9/diskdump/vmcore-2.6.27-rc5-default. > > makedumpfile Completed. > Wed Sep 10 14:33:36 PDT 2008 > > > The fact that it took only 1 min 40 sec in running makedumpfile was > EXCELLENT and EXCITING!!! Remember last time i tested on a 256 cpu > 1TB A4700? It took 18 hours to complete the makedumpfile. What an > improvement! > > Hmmm, the reason it is only "almost there" was that crash failed > to analyze the output of makedumpfile. :( Crash was happy with > the vmcore saved with 'cp' command. > > a4700rac:/var/tmp/jlan # crash -d 1 /boot/vmlinux-2.6.27-rc5-default > /mnt/sda9/diskdump/vmcore-2.6.27-rc5-default > > crash 4.0-4.10 > 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, 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. > > crash: xc_core_elf_verify: not a xen ELF core file > diskdump_data: > flags: 6 (KDUMP_CMPRS_LOCAL|ERROR_EXCLUDED) > dfd: 3 > ofp: 0 > machine_type: 50 (EM_IA_64) > > header: 6000000001142c70 > signature: "KDUMP " > header_version: 1 > utsname: > sysname: > nodename: > release: > version: > machine: > domainname: > timestamp: > tv_sec: 0 > tv_usec: 0 > status: 0 () > block_size: 65536 > sub_hdr_size: 1 > bitmap_blocks: 2076 > max_mapnr: 543813611 > total_ram_blocks: 0 > device_blocks: 0 > written_blocks: 0 > current_cpu: 0 > nr_cpus: 1 > tasks[nr_cpus]: 0 > > sub_header: 0 (n/a) > > sub_header_kdump: 6000000001152c80 > phys_base: 6044000000 > dump_level: 31 (0x1f) > (DUMP_EXCLUDE_ZERO|DUMP_EXCLUDE_CACHE|DUMP_EXCLUDE_CACHE_PRI|DUMP_EXCLUDE_USER_DATA|DUMP_EXCLUDE_FREE) > > data_offset: 81e0000 > block_size: 65536 > block_shift: 16 > bitmap: 2000000000530010 > bitmap_len: 136052736 > dumpable_bitmap: 2000000008700010 > byte: 0 > bit: 0 > compressed_page: 6000000001162c90 > curbufptr: 0 > > page_cache_hdr[0]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 20000000109e0010 > pg_hit_count: 0 > page_cache_hdr[1]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 20000000109f0010 > pg_hit_count: 0 > page_cache_hdr[2]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2000000010a00010 > pg_hit_count: 0 > page_cache_hdr[3]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2000000010a10010 > pg_hit_count: 0 > page_cache_hdr[4]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2000000010a20010 > pg_hit_count: 0 > page_cache_hdr[5]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2000000010a30010 > pg_hit_count: 0 > page_cache_hdr[6]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2000000010a40010 > pg_hit_count: 0 > page_cache_hdr[7]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2000000010a50010 > pg_hit_count: 0 > page_cache_hdr[8]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2000000010a60010 > pg_hit_count: 0 > page_cache_hdr[9]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2000000010a70010 > pg_hit_count: 0 > page_cache_hdr[10]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2000000010a80010 > pg_hit_count: 0 > page_cache_hdr[11]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2000000010a90010 > pg_hit_count: 0 > page_cache_hdr[12]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2000000010aa0010 > pg_hit_count: 0 > page_cache_hdr[13]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2000000010ab0010 > pg_hit_count: 0 > page_cache_hdr[14]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2000000010ac0010 > pg_hit_count: 0 > page_cache_hdr[15]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2000000010ad0010 > pg_hit_count: 0 > > page_cache_buf: 20000000109e0010 > evict_index: 0 > evictions: 0 > accesses: 0 > cached_reads: 0 > valid_pages: 20000000108d0010 > compressed kdump: phys_start: 6044000000 > gdb /boot/vmlinux-2.6.27-rc5-default > 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 "ia64-unknown-linux-gnu"... > > crash: CONFIG_HZ: 250 > crash: CONFIG_NR_CPUS: 512 > verify_namelist: > /proc/version: > Linux version 2.6.27-rc5-default (jlan at jackhammer) (gcc version 4.1.2 > 20070115 (SUSE Linux)) #61 SMP Wed Sep 10 14:21:26 PDT 2008 > utsname version: #61 SMP Wed Sep 10 14:21:26 PDT 2008 > /boot/vmlinux-2.6.27-rc5-default: > Linux version 2.6.27-rc5-default (jlan at jackhammer) (gcc version 4.1.2 > 20070115 (SUSE Linux)) #61 SMP Wed Sep 10 14:21:26 PDT 2008 > > WARNING: Because this kernel was compiled with gcc version 4.1.2, certain > commands or command options may fail unless crash is invoked with > the "--readnow" command line option. > > crash: get_cpus_online: online: 128 > node_table[0]: > id: 0 > pgdat: 0 > size: 543813632 > present: 73014444033 > mem_map: 0 > start_paddr: 0 > start_mapnr: 0 > NOTE: page_hash_table does not exist in this kernel > crash: page excluded: kernel virtual address: e000006003108e00 type: > "runqueues entry (per_cpu)" > a4700rac:/var/tmp/jlan # > >
