Messages in this thread | | | Date | Sun, 21 May 2006 12:25:22 -0700 | From | "Randy.Dunlap" <> | Subject | Re: [PATCH] Documentation update for kdump |
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On Thu, 11 May 2006 12:35:57 -0700 David Wilder wrote:
> This patch contains a re-write of the kdump documentation (kdump.txt). > We have updated much of the document to reflect the current state of > kdump and reformatted the document for readability.
+Install kexec-tools and the Kdump patch +--------------------------------------- + +1) Login as the root user. + +2) Download the kexec-tools user-space package from the following URL: + + http://www.xmission.com/~ebiederm/files/kexec/kexec-tools-1.101.tar.gz + +3) Unpack the tarball with the tar command, as follows: + + tar xvpzf kexec-tools-1.101.tar.gz + +4) Download the latest consolidated Kdump patch from the following URL: + + http://lse.sourceforge.net/kdump/ + + (This location is being used until all the user-space Kdump patches + are integrated with the kexec-tools package.) + +5) Change to the kexec-tools-1.101 directory, as follows: + + cd kexec-tools-1.101 + +6) Apply the consolidated patch to the kexec-tools-1.101 source tree + with the patch command, as follows. (Modify the path to the downloaded + patch as necessary.) + + patch -p1 < /path-to-kdump-patch/kexec-tools-1.101-kdump.patch + +7) Configure the package, as follows: + + ./configure + +8) Compile the package, as follows: + + make
Can 1) log in as root be moved to here?
+9) Install the package, as follows: + + make install
+The dump-capture kernel +----------------------- + +1) Under "General setup," append "-kdump" to the current string in + "Local version." + +2) On x86, enable high memory support under "Processor type and + features": + + CONFIG_HIGHMEM64G=y + or + CONFIG_HIGHMEM4G
That would be CONFIG_HIGHMEM4B=y but why is either of these required?
+6) Use a suitable value for "Physical address where the kernel is + loaded" (under "Processor type and features"). This only appears when + "kernel crash dumps" is enabled. By default this value is 0x1000000 + (16MB). It should be the same as X in the "crashkernel=Y@X" boot + parameter discussed above. + + On x86 and x86_64, use "CONFIG_PHYSICAL_START=0x1000000". + + On ppc64 the value is automatically set at 32MB when + CONFIG_CRASH_DUMP is set.
Two 6)'s.
+6) Optionally enable "/proc/vmcore support" under "Filesystems" -> + "Pseudo filesystems". + + CONFIG_PROC_VMCORE=y + (CONFIG_PROC_VMCORE is set by default when CONFIG_CRASH_DUMP is selected.) +
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