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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2007-04-12 15:30:22 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-04-13 04:09:39 +1000 |
| commit | 88df6e90fa9782dbf44d936e44649afe271e4790 (patch) | |
| tree | d0f4c46731e35e96a381dd3e3138f0276741ca57 /arch/powerpc/Kconfig.debug | |
| parent | ee4f2ea48674b6c9d91bc854edc51a3e6a7168c4 (diff) | |
| download | linux-88df6e90fa9782dbf44d936e44649afe271e4790.tar.gz linux-88df6e90fa9782dbf44d936e44649afe271e4790.tar.bz2 linux-88df6e90fa9782dbf44d936e44649afe271e4790.zip | |
[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.debug | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug index 50f48f0c5630..0f8bb86995b4 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 |