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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2007-04-12 15:30:22 +1000
committerPaul Mackerras <paulus@samba.org>2007-04-13 04:09:39 +1000
commit88df6e90fa9782dbf44d936e44649afe271e4790 (patch)
treed0f4c46731e35e96a381dd3e3138f0276741ca57 /arch/powerpc/Kconfig.debug
parentee4f2ea48674b6c9d91bc854edc51a3e6a7168c4 (diff)
downloadlinaro-lsk-88df6e90fa9782dbf44d936e44649afe271e4790.tar.gz
[POWERPC] DEBUG_PAGEALLOC for 32-bit
Here's an implementation of DEBUG_PAGEALLOC for ppc32. It disables BAT mapping and is only tested with Hash table based processor though it shouldn't be too hard to adapt it to others. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> arch/powerpc/Kconfig.debug | 9 ++++++ arch/powerpc/mm/init_32.c | 4 +++ arch/powerpc/mm/pgtable_32.c | 52 +++++++++++++++++++++++++++++++++++++++ arch/powerpc/mm/ppc_mmu_32.c | 4 ++- include/asm-powerpc/cacheflush.h | 6 ++++ 5 files changed, 74 insertions(+), 1 deletion(-) Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/Kconfig.debug')
-rw-r--r--arch/powerpc/Kconfig.debug9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index 50f48f0c563..0f8bb86995b 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -18,6 +18,15 @@ config DEBUG_STACK_USAGE
This option will slow down process creation somewhat.
+config DEBUG_PAGEALLOC
+ bool "Debug page memory allocations"
+ depends on DEBUG_KERNEL && !SOFTWARE_SUSPEND && PPC32
+ help
+ Unmap pages from the kernel linear mapping after free_pages().
+ This results in a large slowdown, but helps to find certain types
+ of memory corruptions.
+
+
config HCALL_STATS
bool "Hypervisor call instrumentation"
depends on PPC_PSERIES && DEBUG_FS