On 16/10/06, Mike Galbraith <[email protected]> wrote:
On Sun, 2006-10-15 at 07:59 +0000, Mike Galbraith wrote:
> 2.6.19-rc1 + patch-2.6.19-rc1-kmemleak-0.11 compiles fine now (unless
> CONFIG_DEBUG_KEEP_INIT is set), boots and runs too.. but axle grease
> runs a lot faster ;-) I'll try a stripped down config sometime.
My roughly three orders of magnitude (amusing to watch:) boot slowdown
turned out to be stack unwinding. With CONFIG_UNWIND_INFO disabled,
2.6.19-rc2 + patch-2.6.19-rc1-kmemleak-0.11 runs just fine.
Kmemleak introduces some overhead but shouldn't be that bad.
DEBUG_SLAB also introduces an overhead by erasing the data in the
allocated blocks.
Note that if the allocated blocks are added to a list and never
removed, kmemleak won't be able to detect the leak as the objects are
stilled referred. In this case, you can only use DEBUG_SLAB_LEAK.
--
Catalin
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