Commit a7d06ca7 authored Mar 25, 2006 by Chen, Kenneth W Committed by Linus Torvalds Mar 25, 2006

[PATCH] x86: HUGETLBFS and DEBUG_PAGEALLOC are incompatible



DEBUG_PAGEALLOC is not compatible with hugetlb page support.  That debug
option turns off PSE.  Once it is turned off in CR4, the cpu will ignore
pse bit in the pmd and causing infinite page-not- present faults.

So disable DEBUG_PAGEALLOC if the user selected hugetlbfs.

Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent d3f4aaa3

arch/i386/Kconfig.debug

+1 −1

Original line number	Diff line number	Diff line
		@@ -45,7 +45,7 @@ comment "Page alloc debug is incompatible with Software Suspend on i386"

		config DEBUG_PAGEALLOC
		bool "Page alloc debugging"
		depends on DEBUG_KERNEL && !SOFTWARE_SUSPEND
		depends on DEBUG_KERNEL && !SOFTWARE_SUSPEND && !HUGETLBFS
		help
		Unmap pages from the kernel linear mapping after free_pages().
		This results in a large slowdown, but helps to find certain types

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