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* kmemleak: Handle percpu memory allocationCatalin Marinas2011-12-021-0/+8
| | | | | | | | | | | | | This patch adds kmemleak callbacks from the percpu allocator, reducing a number of false positives caused by kmemleak not scanning such memory blocks. The percpu chunks are never reported as leaks because of current kmemleak limitations with the __percpu pointer not pointing directly to the actual chunks. Reported-by: Huajun Li <huajun.li.lee@gmail.com> Acked-by: Christoph Lameter <cl@gentwo.org> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* kmemleak: Simplify the kmemleak_scan_area() function prototypeCatalin Marinas2009-10-281-4/+2
| | | | | | | | | | This function was taking non-necessary arguments which can be determined by kmemleak. The patch also modifies the calling sites. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Rusty Russell <rusty@rustcorp.com.au>
* kmemleak: Mark the early log buffer as __initdataCatalin Marinas2009-08-271-9/+9
| | | | | | | | This buffer isn't needed after kmemleak was initialised so it can be freed together with the .init.data section. This patch also marks functions conditionally accessing the early log variables with __ref. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* kmemleak: Allow partial freeing of memory blocksCatalin Marinas2009-07-081-0/+4
| | | | | | | | | | | Functions like free_bootmem() are allowed to free only part of a memory block. This patch adds support for this via the kmemleak_free_part() callback which removes the original object and creates one or two additional objects as a result of the memory block split. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Ingo Molnar <mingo@elte.hu> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
* kmemleak: Add the base supportCatalin Marinas2009-06-111-0/+96
This patch adds the base support for the kernel memory leak detector. It traces the memory allocation/freeing in a way similar to the Boehm's conservative garbage collector, the difference being that the unreferenced objects are not freed but only shown in /sys/kernel/debug/kmemleak. Enabling this feature introduces an overhead to memory allocations. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Ingo Molnar <mingo@elte.hu> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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