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kdump: add /sys/kernel/vmcoreinfo ABI documentation

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/sys/kernel/vmcoreinfo was introduced long back but there is no ABI
documentation.  This patch adds the documentation.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Cc: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
Cc: Dan Aloni <da-x@monatomic.org>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Vivek Goyal 2014-01-23 15:56:01 -08:00 committed by Linus Torvalds
parent 77019967f0
commit bdd490ade3
1 changed files with 14 additions and 0 deletions
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14
Documentation/ABI/testing/sysfs-kernel-vmcoreinfo Normal file
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What: /sys/kernel/vmcoreinfo
Date: October 2007
KernelVersion: 2.6.24
Contact: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
Kexec Mailing List <kexec@lists.infradead.org>
Vivek Goyal <vgoyal@redhat.com>
Description
Shows physical address and size of vmcoreinfo ELF note.
First value contains physical address of note in hex and
second value contains the size of note in hex. This ELF
note info is parsed by second kernel and exported to user
space as part of ELF note in /proc/vmcore file. This note
contains various information like struct size, symbol
values, page size etc.