1MKDUMRD(8) System Manager's Manual MKDUMRD(8)
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6 mkdumprd - creates initial ramdisk images for kdump crash recovery
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9 mkdumprd [OPTION]
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13 mkdumprd creates an initial ram file system for use in conjunction with
14 the booting of a kernel within the kdump framework for crash recovery.
15 mkdumprds purpose is to create an initial ram filesystem capable of
16 copying the crashed systems vmcore image to a location specified in
17 /etc/kdump.conf
18 mkdumprd interrogates the running system to understand what modules
20 need to be loaded in the initramfs (based on configuration retrieved
21 from /etc/kdump.conf)
22 mkdumprd add a new dracut module 99kdumpbase and use dracut utility to
24 generate the initramfs. When generating a kdump initramfs, mkdumprd
25 will determine how much disk space is available, if the dump target's
26 available space is not greater than the total system memory, mkdumprd
27 will print a warning to remind that there might not be enough space to
28 save a vmcore. The warning covers extreme scenarios such as the slab
29 explodes with non-zero data or a full vmcore, etc. Therefore, need to
30 prevent users from having minimum disk space for crash dump.
31 mkdumprd was not intended for casual use outside of the service ini‐
33 tialization script for the kdump utility, and should not be run manu‐
34 ally. If you require a custom kdump initramfs image, it is suggested
35 that you use the kdump service infrastructure to create one, and then
36 manually unpack, modify and repack the image.
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41 All options here are passed to dracut directly, please refer dracut
42 docs
43 for the info.
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47 dracut(8)
48 Fri Feb 9 2007 MKDUMRD(8)