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This commit is based on the s390-tools-1.39.0 version. Changes on top of s390-tools-1.39.0: - Add MIT license to all source files - Add LICENSE file - Transform REAMDE to README.md (markdown) - Add AUTHORS.md file - Add CONTRIBUTING.md file - Move changelog from README to CHANGELOG.md file Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
55 lines
1.9 KiB
Plaintext
55 lines
1.9 KiB
Plaintext
zfcpdump: S390 SCSI dump tool (Version 3)
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=========================================
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zfcpdump is used for creating System dumps for Linux on System z. It has two
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parts: a zfcpdump enabled Linux kernel and a user space application.
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This is the 3rd version of zfcpdump which uses the upstream kernel
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version 3.12 or above. This version writes the dump to a partition in
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contrast to the previous versions where the dump was written to
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a file system.
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The user space application of zfcpdump can reside either in an intitramfs or an
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initrd. It reads from /proc/vmcore, provided by the kernel part, and writes the
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system dump to a SCSI disk partition.
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To build a zfcpdump enabled kernel use the following settings in your kernel
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configuration:
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* CONFIG_ZFCPDUMP=y
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* CONFIG_BLK_DEV_INITRD=y
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* CONFIG_EFI_PARTITION=y for using GPT disk layout
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* CONFIG_MSDOS_PARTITION=y for using MSDOS disk layout
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* BLK_DEV_SD=y
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* Enable ZFCP driver
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* Enable SCSI driver
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* Disable as many features as possible to keep the kernel small.
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E.g. network and file system support is not needed at all.
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You can use "make zfcpdump_defconfig" as a starting point for your kernel
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configuration.
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* Issue "make bzImage" to build the zfcpdump kernel image.
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In a Linux distribution the zfcpdump enabled kernel image must be copied to
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/lib/s390-tools/zfcpdump/zfcpdump_part.image, where the s390 zipl tool is
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looking for the dump kernel when preparing a SCSI dump disk.
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Create and install initrd
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=========================
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* make
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Builds "cpioinit" and statically linked "zfcpdump" application. Then cpioinit
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is used to integrate the zfcpdump application into the cpio archive
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zfcpdump_part.rd.
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* make install
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The initrd zfcpdump_part.rd is installed to "/lib/s390-tools/zfcpdump/".
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Additional information
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======================
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For more information on how to use zfcpdump and zipl refer to the s390
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'Using the Dump Tools' book, which is available from:
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http://www.ibm.com/developerworks/linux/linux390.
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