[Crash-utility] EXT: Re: crash start in CentOS 8
Agrain Patrick
patrick.agrain at al-enterprise.com
Mon Jun 15 07:20:51 UTC 2020
-----Message d'origine-----
De : crash-utility-bounces at redhat.com [mailto:crash-utility-bounces at redhat.com] 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 at redhat.com>
Objet : EXT: Re: [Crash-utility] 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 at al-enterprise.com> 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 at 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 at 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 at 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 at lxkmg-pag-ale test64]#
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