Hi Patrick, On Mon, Jun 15, 2020 at 12:51 PM Agrain Patrick <patrick.agrain@xxxxxxxxxxxxxxxxx> wrote: > -----Message d'origine----- > De : crash-utility-bounces@xxxxxxxxxx [mailto:crash-utility-bounces@xxxxxxxxxx] De la part de Bhupesh Sharma > Envoyé : lundi 15 juin 2020 09:13 > À : Discussion list for crash utility usage, maintenance and development <crash-utility@xxxxxxxxxx> > Objet : EXT: Re: crash start in CentOS 8 > > > ** External email - Please consider with caution ** > > > Hello Patrick, > > On Mon, Jun 15, 2020 at 12:28 PM Agrain Patrick <patrick.agrain@xxxxxxxxxxxxxxxxx> wrote: > > > > Hello, > > > > > > > > I tried to test the crash utility from CentOS 8 with following requirements: > > > > First machine (VMware) on which CentOS 8 is installed and on which I performed a fake crash using SysRq. After reboot, The /var/crash was populated with the vmcore. > > Second machine (Server) on which CentOS 8 is also installed and on which I wish to analyze the crash. > > > > > > > > Both machine have the same CentOS build installed. > > > > I imported System.map-4.18.0-147.el8.x86_64, vmcore and vmlinux.debuginfo from first machine to a directory on the second machine. > > > > When I run ‘crash’, I have following messages (see below), but no ‘crash>’ prompt. > > > > > > > > What have I missed ? What Should I check ? > > > > > > > > Thanks. > > > > Best regards, > > > > Patrick Agrain > > > > > > > > [root@lxkmg-pag-ale test64]# /usr/bin/crash > > System.map-4.18.0-147.el8.x86_64 vmlinux.debuginfo vmcore > > > > > > > > crash 7.2.6-2.el8 > > > > Copyright (C) 2002-2019 Red Hat, Inc. > > > > Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation > > > > Copyright (C) 1999-2006 Hewlett-Packard Co > > > > Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited > > > > Copyright (C) 2006, 2007 VA Linux Systems Japan K.K. > > > > Copyright (C) 2005, 2011 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) 7.6 > > > > Copyright (C) 2013 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"... > > > > > > > > please wait... (patching 92149 gdb minimal_symbol values) [Vanished > > after a few seconds] > > > > > > > > [root@lxkmg-pag-ale test64]# > > Can you please increase the verbosity level by specifying the -d parameter while invoking the crash command? > >From CRASH(8) man page: > > -d num: Set the internal debug level. The higher the number, the more debugging data will be printed when crash initializes and runs. > > I normally would run crash with -d 15 to get verbose logs (but not too verbose to overwhelm the console :)). > Can you please share the output with the same? > > Thanks, > Bhupesh > > > Thanks Bhupesh for taking some time. > Please find the logs with -d 15 verbosity. > > Thanks. > Best regards, > Patrick Agrain > > [root@lxkmg-pag-ale test64]# /usr/bin/crash -d 15 System.map-4.18.0-147.el8.x86_64 vmlinux.debuginfo vmcore > > crash 7.2.6-2.el8 > Copyright (C) 2002-2019 Red Hat, Inc. > Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation > Copyright (C) 1999-2006 Hewlett-Packard Co > Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited > Copyright (C) 2006, 2007 VA Linux Systems Japan K.K. > Copyright (C) 2005, 2011 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. > > compressed kdump: header->utsname.machine: x86_64 > compressed kdump: memory bitmap offset: 2000 > diskdump_data: > filename: vmcore > flags: 6 (KDUMP_CMPRS_LOCAL|ERROR_EXCLUDED) > dfd: 3 > ofp: 0 > machine_type: 62 (EM_X86_64) > > header: 2d006a0 > signature: "KDUMP " > header_version: 6 > utsname: > sysname: Linux > nodename: localhost.localdomain > release: 4.18.0-147.el8.x86_64 > version: #1 SMP Wed Dec 4 21:51:45 UTC 2019 > machine: x86_64 > domainname: (none) > timestamp: > tv_sec: 5ea68afe > tv_usec: 0 > status: 2 (DUMP_DH_COMPRESSED_LZO) > block_size: 4096 > sub_hdr_size: 1 > bitmap_blocks: 32 > max_mapnr: 524288 > 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: 2d016b0 > phys_base: 35a00000 > dump_level: 31 (0x1f) (DUMP_EXCLUDE_ZERO|DUMP_EXCLUDE_CACHE|DUMP_EXCLUDE_CACHE_PRI|DUMP_EXCLUDE_USER_DATA|DUMP_EXCLUDE_FREE) > split: 0 > start_pfn: (unused) > end_pfn: (unused) > offset_vmcoreinfo: 4580 (0x11e4) > size_vmcoreinfo: 2024 (0x7e8) > OSRELEASE=4.18.0-147.el8.x86_64 > PAGESIZE=4096 > SYMBOL(init_uts_ns)=ffffffff86812540 > SYMBOL(node_online_map)=ffffffff86a06d60 > SYMBOL(swapper_pg_dir)=ffffffff8680a000 > SYMBOL(_stext)=ffffffff85600000 > SYMBOL(vmap_area_list)=ffffffff868d2a90 > SYMBOL(mem_section)=ffff95a67ffd2000 > LENGTH(mem_section)=2048 > SIZE(mem_section)=16 > OFFSET(mem_section.section_mem_map)=0 > SIZE(page)=64 > SIZE(pglist_data)=171968 > SIZE(zone)=1472 > SIZE(free_area)=88 > SIZE(list_head)=16 > SIZE(nodemask_t)=128 > OFFSET(page.flags)=0 > OFFSET(page._refcount)=52 > OFFSET(page.mapping)=24 > OFFSET(page.lru)=8 > OFFSET(page._mapcount)=48 > OFFSET(page.private)=40 > OFFSET(page.compound_dtor)=16 > OFFSET(page.compound_order)=17 > OFFSET(page.compound_head)=8 > OFFSET(pglist_data.node_zones)=0 > OFFSET(pglist_data.nr_zones)=171232 > OFFSET(pglist_data.node_start_pfn)=171240 > OFFSET(pglist_data.node_spanned_pages)=171256 > OFFSET(pglist_data.node_id)=171264 > OFFSET(zone.free_area)=192 > OFFSET(zone.vm_stat)=1296 > OFFSET(zone.spanned_pages)=112 > OFFSET(free_area.free_list)=0 > OFFSET(list_head.next)=0 > OFFSET(list_head.prev)=8 > OFFSET(vmap_area.va_start)=0 > OFFSET(vmap_area.list)=48 > LENGTH(zone.free_area)=11 > SYMBOL(log_buf)=ffffffff8685a280 > SYMBOL(log_buf_len)=ffffffff8685a27c > SYMBOL(log_first_idx)=ffffffff8713a770 > SYMBOL(clear_idx)=ffffffff8713a744 > SYMBOL(log_next_idx)=ffffffff8713a760 > SIZE(printk_log)=16 > OFFSET(printk_log.ts_nsec)=0 > OFFSET(printk_log.len)=8 > OFFSET(printk_log.text_len)=10 > OFFSET(printk_log.dict_len)=12 > LENGTH(free_area.free_list)=5 > NUMBER(NR_FREE_PAGES)=0 > NUMBER(PG_lru)=5 > NUMBER(PG_private)=12 > NUMBER(PG_swapcache)=9 > NUMBER(PG_swapbacked)=18 > NUMBER(PG_slab)=8 > NUMBER(PG_hwpoison)=22 > NUMBER(PG_head_mask)=32768 > NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE)=-129 > NUMBER(HUGETLB_PAGE_DTOR)=2 > NUMBER(PAGE_OFFLINE_MAPCOUNT_VALUE)=-257 > NUMBER(phys_base)=899678208 > SYMBOL(init_top_pgt)=ffffffff8680a000 > NUMBER(pgtable_l5_enabled)=0 > SYMBOL(node_data)=ffffffff86a02580 > LENGTH(node_data)=1024 > KERNELOFFSET=4600000 > NUMBER(KERNEL_IMAGE_SIZE)=1073741824 > NUMBER(sme_mask)=0 > CRASHTIME=1587972862 > offset_note: 4200 (0x1068) > size_note: 2404 (0x964) > notes_buf: 2cff690 > num_vmcoredd_notes: 0 > num_prstatus_notes: 1 > notes[0]: 2cff690 (NT_PRSTATUS) > si.signo: 0 si.code: 0 si.errno: 0 > cursig: 0 sigpend: 0 sighold: 0 > pid: 7020 ppid: 0 pgrp: 0 sid:0 > utime: 0.000000 stime: 0.000000 > cutime: 0.000000 cstime: 0.000000 > ORIG_RAX: ffffffffffffffff fpvalid: 0 > R15: 0000000000000000 R14: 000056500b98d6a0 > R13: ffffffff86936fc0 R12: 0000000000000000 > RBP: 0000000000000004 RBX: 0000000000000063 > R11: 6873617263206120 R10: 7265676769725420 > R9: 54203a2071527379 R8: 0000000000000556 > RAX: ffffffff85b12d10 RCX: 0000000000000006 > RDX: 0000000000000000 RSI: 0000000000000086 > RDI: 0000000000000063 RIP: ffffffff85b12d22 > RFLAGS: 0000000000010246 RSP: ffffbd9943093e80 > FS_BASE: 00007f2d9a1f6740 > GS_BASE: 0000000000000000 > CS: 0010 SS: 0018 DS: 0000 > ES: 0000 FS: 0000 GS: 0000 > snapshot_task: 0 > num_qemu_notes: 0 > NOTE offsets: 1068 (NT_PRSTATUS) > offset_eraseinfo: 0 (0x0) > size_eraseinfo: 0 (0x0) > start_pfn_64: (unused) > end_pfn_64: (unused) > max_mapnr_64: 524288 (0x80000) > > data_offset: 22000 > block_size: 4096 > block_shift: 12 > bitmap: 2d05250 > bitmap_len: 131072 > max_mapnr: 524288 (0x80000) > dumpable_bitmap: 7f454b94e010 > byte: 0 > bit: 0 > compressed_page: 2d026c0 > curbufptr: 0 > > page_cache_hdr[0]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2d55290 > pg_hit_count: 0 > page_cache_hdr[1]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2d56290 > pg_hit_count: 0 > page_cache_hdr[2]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2d57290 > pg_hit_count: 0 > page_cache_hdr[3]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2d58290 > pg_hit_count: 0 > page_cache_hdr[4]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2d59290 > pg_hit_count: 0 > page_cache_hdr[5]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2d5a290 > pg_hit_count: 0 > page_cache_hdr[6]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2d5b290 > pg_hit_count: 0 > page_cache_hdr[7]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2d5c290 > pg_hit_count: 0 > page_cache_hdr[8]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2d5d290 > pg_hit_count: 0 > page_cache_hdr[9]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2d5e290 > pg_hit_count: 0 > page_cache_hdr[10]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2d5f290 > pg_hit_count: 0 > page_cache_hdr[11]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2d60290 > pg_hit_count: 0 > page_cache_hdr[12]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2d61290 > pg_hit_count: 0 > page_cache_hdr[13]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2d62290 > pg_hit_count: 0 > page_cache_hdr[14]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2d63290 > pg_hit_count: 0 > page_cache_hdr[15]: > pg_flags: 0 () > pg_addr: 0 > pg_bufptr: 2d64290 > pg_hit_count: 0 > > page_cache_buf: 2d55290 > evict_index: 0 > evictions: 0 > accesses: 0 > cached_reads: 0 > valid_pages: 2d00210 > readmem: read_diskdump() > crash: pv_init_ops exists: ARCH_PVOPS > VMCOREINFO: NUMBER(phys_base): 899678208 -> 35a00000 > gdb vmlinux.debuginfo > GNU gdb (GDB) 7.6 > Copyright (C) 2013 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"... > GETBUF(328 -> 0) > GETBUF(1500 -> 1) > > FREEBUF(1) > FREEBUF(0) > <readmem: ffffffff82131200, KVADDR, "page_offset_base", 8, (FOE|Q), d8b948> > <read_diskdump: addr: ffffffff82131200 paddr: 37b31200 cnt: 8> > read_diskdump: PAGE_EXCLUDED: paddr/pfn: 37b31200/37b31 > crash: page excluded: kernel virtual address: ffffffff82131200 type: "page_offset_base" > [root@lxkmg-pag-ale test64]# Hmmm, I think you should find better results with: $ crash vmlinux vmcore (On the machine used for post-processing) and $ crash vmlinux /proc/kcore (On the original crashing system) I think if that helps you reach the crash > prompt, we have a potential issue which needs to be looked-at. Can you please try to run the same and let me know the outcome? Thanks, Bhupesh -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
