Hi Dave,
When starting crash on s390(x) with CONFIG_SPARSEMEM enabled we get the
following error message:
crash: CONFIG_SPARSEMEM kernels not supported for this architecture
The following patch fixes this problem, but I am not sure, if I set
_MAX_PHYSMEM_BITS to the correct value (I used 31 for s390 and 64 for
s390x). Could you please explain the meaning of _MAX_PHSYSMEM_BITS?
---
diff -Naurp crash-4.0-6.3/defs.h crash-4.0-6.3-config-sparse/defs.h
--- crash-4.0-6.3/defs.h 2008-04-29 19:39:17.000000000 +0200
+++ crash-4.0-6.3-config-sparse/defs.h 2008-08-12 17:03:54.000000000 +0200
@@ -2634,6 +2634,8 @@ struct efi_memory_desc_t {
#define TIF_SIGPENDING (2)
+#define _MAX_PHYSMEM_BITS 31
+
#endif /* S390 */
#ifdef S390X
@@ -2656,6 +2658,8 @@ struct efi_memory_desc_t {
#define TIF_SIGPENDING (2)
+#define _MAX_PHYSMEM_BITS 64
+
#endif /* S390X */
#ifdef PLATFORM
diff -Naurp crash-4.0-6.3/s390.c crash-4.0-6.3-config-sparse/s390.c
--- crash-4.0-6.3/s390.c 2008-04-29 19:39:17.000000000 +0200
+++ crash-4.0-6.3-config-sparse/s390.c 2008-08-12 17:04:03.000000000 +0200
@@ -130,6 +130,7 @@ s390_init(int when)
machdep->dump_irq = s390_dump_irq;
if (!machdep->hz)
machdep->hz = HZ;
+ machdep->max_physmem_bits = _MAX_PHYSMEM_BITS;
break;
case POST_INIT:
diff -Naurp crash-4.0-6.3/s390x.c crash-4.0-6.3-config-sparse/s390x.c
--- crash-4.0-6.3/s390x.c 2008-04-29 19:39:16.000000000 +0200
+++ crash-4.0-6.3-config-sparse/s390x.c 2008-08-12 17:04:01.000000000 +0200
@@ -128,6 +128,7 @@ s390x_init(int when)
machdep->dump_irq = s390x_dump_irq;
if (!machdep->hz)
machdep->hz = HZ;
+ machdep->max_physmem_bits = _MAX_PHYSMEM_BITS;
break;
case POST_INIT:
--
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