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From: Hannes Reinecke <hare@suse.de>
To: Simon Horman <horms@verge.net.au>
Cc: kexec mailing list <kexec@lists.infradead.org>
Subject: [PATCH] Increase kernel text size for x86_64
Date: Wed, 12 Aug 2009 09:41:23 +0200	[thread overview]
Message-ID: <4A827223.8090907@suse.de> (raw)

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Hi all,

I cannot load a x86_64 kernel with kexec on 2.6.31; the error message is:

Can't find kernel text map area from kcore
Cannot load /boot/vmlinuz

Digging through the source I found a mismatch between the assumed
kernel text size; kexec has:

#define KERNEL_TEXT_SIZE  (40UL*1024*1024)

but on the kernel side we have:

include/asm/page_64_types.h:
#define KERNEL_IMAGE_SIZE   (512 * 1024 * 1024)

And, indeed, changing the definition in kexec-tools to the kernel one
fixed the problem.

Not sure if this has been reported before, if so please ignore
the noise.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare@suse.de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Markus Rex, HRB 16746 (AG Nürnberg)

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diff --git a/kexec/arch/x86_64/crashdump-x86_64.h b/kexec/arch/x86_64/crashdump-x86_64.h
index 9f4dee9..0e83527 100644
--- a/kexec/arch/x86_64/crashdump-x86_64.h
+++ b/kexec/arch/x86_64/crashdump-x86_64.h
@@ -11,7 +11,7 @@ int load_crashdump_segments(struct kexec_info *info, char *mod_cmdline,
 #define MAXMEM           0x3fffffffffffUL
 
 /* Kernel text size */
-#define KERNEL_TEXT_SIZE  (40UL*1024*1024)
+#define KERNEL_TEXT_SIZE  (512UL*1024*1024)
 
 #define CRASH_MAX_MEMMAP_NR	(KEXEC_MAX_SEGMENTS + 1)
 #define CRASH_MAX_MEMORY_RANGES	(MAX_MEMORY_RANGES + 2)

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             reply	other threads:[~2009-08-12  7:41 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-08-12  7:41 Hannes Reinecke [this message]
2009-08-13  0:40 ` [PATCH] Increase kernel text size for x86_64 Simon Horman
2009-08-13  8:12   ` Hannes Reinecke
2009-08-13  8:21     ` Simon Horman

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