Messages in this thread | | | From | Kazuhito Hagio <> | Subject | RE: [PATCH 1/2 v2] kdump: add the vmcoreinfo documentation | Date | Mon, 10 Dec 2018 21:10:41 +0000 |
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-----Original Message----- > > makedumpfile doesn't have any switch which dumps VMCOREINFO from kcore > > for now. (I'm thinking to have makedumpfile dump it as debug message, > > though.) > > Might be useful as people are looking into using VMCOREINFO when > debugging a live kernel...
Now makedumpfile in 'devel' branch can print VMCOREINFO in /proc/kcore as debug message with the following command:
# ./makedumpfile --mem-usage /proc/kcore -D ... VMCOREINFO : OSRELEASE=4.20.0-0.rc2.git0.1.fc30.x86_64 PAGESIZE=4096 page_size : 4096 SYMBOL(init_uts_ns)=ffffffff84213540 ...
Also, it seems that recent crash utility in git repo with kernel 4.19 or newer can dump it with 'help -n' command:
# ./crash vmlinux /proc/kcore ... crash> help -n ... Elf64_Nhdr: n_namesz: 11 ("VMCOREINFO") n_descsz: 1955 n_type: 0 (unknown)
OSRELEASE=4.20.0-0.rc2.git0.1.fc30.x86_64 PAGESIZE=4096 SYMBOL(init_uts_ns)=ffffffff84213540 ...
Thanks, Kazu
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