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authorMichael Holzheu <holzheu@linux.vnet.ibm.com>2011-10-30 15:16:37 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2011-10-30 15:16:41 +0100
commitd3bf37955d46718ee1a7f1fc69f953d2328ba7c2 (patch)
treea15c9bbb510c36dc5da870660dff9c2869920401 /Documentation
parent3d214faea6e4f9b6018bf8589f4b245126349c0a (diff)
[S390] kdump: Add size to elfcorehdr kernel parameter
Currently only the address of the pre-allocated ELF header is passed with the elfcorehdr= kernel parameter. In order to reserve memory for the header in the 2nd kernel also the size is required. Current kdump architecture backends use different methods to do that, e.g. x86 uses the memmap= kernel parameter. On s390 there is no easy way to transfer this information. Therefore the elfcorehdr kernel parameter is extended to also pass the size. This now can also be used as standard mechanism by all future kdump architecture backends. The syntax of the kernel parameter is extended as follows: elfcorehdr=[size[KMG]@]offset[KMG] This change is backward compatible because elfcorehdr=size is still allowed. Acked-by: Vivek Goyal <vgoyal@redhat.com> Acked-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/kernel-parameters.txt6
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 93413ce9688..1fbe3625b2d 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -741,10 +741,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
See Documentation/block/cfq-iosched.txt and
Documentation/block/deadline-iosched.txt for details.
- elfcorehdr= [IA-64,PPC,SH,X86]
+ elfcorehdr=[size[KMG]@]offset[KMG] [IA64,PPC,SH,X86,S390]
Specifies physical address of start of kernel core
- image elf header. Generally kexec loader will
- pass this option to capture kernel.
+ image elf header and optionally the size. Generally
+ kexec loader will pass this option to capture kernel.
See Documentation/kdump/kdump.txt for details.
enable_mtrr_cleanup [X86]