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From 4a6d67d9e938a7accf128aff23f8ad4bda67f729 Mon Sep 17 00:00:00 2001
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From: Xunlei Pang <xlpang@redhat.com>
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Date: Thu, 23 Mar 2017 19:16:59 +0800
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Subject: [PATCH] x86: Support large number of memory ranges
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We got a problem on one SGI 64TB machine, the current kexec-tools
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failed to work due to the insufficient ranges(MAX_MEMORY_RANGES)
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allowed which is defined as 1024(less than the ranges on the machine).
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The kcore header is insufficient due to the same reason as well.
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To solve this, this patch simply doubles "MAX_MEMORY_RANGES" and
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"KCORE_ELF_HEADERS_SIZE".
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Signed-off-by: Xunlei Pang <xlpang@redhat.com>
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Tested-by: Frank Ramsay <frank.ramsay@hpe.com>
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Signed-off-by: Simon Horman <horms@verge.net.au>
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---
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kexec/arch/i386/kexec-x86.h | 2 +-
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kexec/crashdump.h | 4 ++--
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2 files changed, 3 insertions(+), 3 deletions(-)
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diff --git a/kexec/arch/i386/kexec-x86.h b/kexec/arch/i386/kexec-x86.h
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index 33df352..51855f8 100644
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--- a/kexec/arch/i386/kexec-x86.h
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+++ b/kexec/arch/i386/kexec-x86.h
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@@ -1,7 +1,7 @@
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#ifndef KEXEC_X86_H
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#define KEXEC_X86_H
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-#define MAX_MEMORY_RANGES 1024
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+#define MAX_MEMORY_RANGES 2048
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enum coretype {
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CORE_TYPE_UNDEF = 0,
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diff --git a/kexec/crashdump.h b/kexec/crashdump.h
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index 86e1ef2..18bd691 100644
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--- a/kexec/crashdump.h
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+++ b/kexec/crashdump.h
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@@ -7,8 +7,8 @@ extern int get_xen_vmcoreinfo(uint64_t *addr, uint64_t *len);
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/* Need to find a better way to determine per cpu notes section size. */
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#define MAX_NOTE_BYTES 1024
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-/* Expecting ELF headers to fit in 32K. Increase it if you need more. */
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-#define KCORE_ELF_HEADERS_SIZE 32768
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+/* Expecting ELF headers to fit in 64K. Increase it if you need more. */
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+#define KCORE_ELF_HEADERS_SIZE 65536
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/* The address of the ELF header is passed to the secondary kernel
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* using the kernel command line option memmap=nnn.
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* The smallest unit the kernel accepts is in kilobytes,
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--
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1.8.3.1
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