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authorSachin P. Sant <sachinp@in.ibm.com>2006-09-08 07:59:52 +0530
committerPaul Mackerras <paulus@samba.org>2006-09-13 18:30:04 +1000
commite269d269e0b53a7a6cb1d04290f8174bf0488cb4 (patch)
tree387a80fdf9a3ca1ff052911bc3990126e3f0d9ca
parent69588298188b40ed7f75c98a6fd328d82f23ca21 (diff)
downloadop-kernel-dev-e269d269e0b53a7a6cb1d04290f8174bf0488cb4.zip
op-kernel-dev-e269d269e0b53a7a6cb1d04290f8174bf0488cb4.tar.gz
[POWERPC] kdump: Support kernels having 64k page size.
This is required to generate proper core files using kdump on ppc64. Create a backup region of 64K size irrespective of the PAGE SIZE. At present 32K was used as backup size. In the case of 64K page size, second PT_LOAD segments starts at 32K and the first one is not page aligned. __ioremap() (crash_dump.c) fails if pfn = 0 which is the case for the second PT_LOAD segment. This is not an issue for 4K page size because the the first page (32K backup) is copied to second kernel memory and thus referencing with the second kernel pfn. Signed-off-by: Sachin Sant <sachinp@in.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
-rw-r--r--include/asm-powerpc/kdump.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-powerpc/kdump.h b/include/asm-powerpc/kdump.h
index dc1574c..10e8eb1 100644
--- a/include/asm-powerpc/kdump.h
+++ b/include/asm-powerpc/kdump.h
@@ -7,7 +7,7 @@
/* How many bytes to reserve at zero for kdump. The reserve limit should
* be greater or equal to the trampoline's end address.
* Reserve to the end of the FWNMI area, see head_64.S */
-#define KDUMP_RESERVE_LIMIT 0x8000
+#define KDUMP_RESERVE_LIMIT 0x10000 /* 64K */
#ifdef CONFIG_CRASH_DUMP
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