Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / mm / Kconfig.debug

diff --git a/kernel/mm/Kconfig.debug b/kernel/mm/Kconfig.debug
new file mode 100644 (file)
index 0000000..957d3da
--- /dev/null
+++ b/kernel/mm/Kconfig.debug
@@ -0,0 +1,30 @@
+config PAGE_EXTENSION
+       bool "Extend memmap on extra space for more information on page"
+       ---help---
+         Extend memmap on extra space for more information on page. This
+         could be used for debugging features that need to insert extra
+         field for every page. This extension enables us to save memory
+         by not allocating this extra memory according to boottime
+         configuration.
+
+config DEBUG_PAGEALLOC
+       bool "Debug page memory allocations"
+       depends on DEBUG_KERNEL
+       depends on !HIBERNATION || ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC
+       depends on !KMEMCHECK
+       select PAGE_EXTENSION
+       select PAGE_POISONING if !ARCH_SUPPORTS_DEBUG_PAGEALLOC
+       ---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 corruption.
+
+         For architectures which don't enable ARCH_SUPPORTS_DEBUG_PAGEALLOC,
+         fill the pages with poison patterns after free_pages() and verify
+         the patterns before alloc_pages().  Additionally,
+         this option cannot be enabled in combination with hibernation as
+         that would result in incorrect warnings of memory corruption after
+         a resume because free pages are not saved to the suspend image.
+
+config PAGE_POISONING
+       bool