On 18 Jan 2014, at 08:41, Jianguo Wu <wujianguo@xxxxxxxxxx> wrote: > On 2014/1/17 20:04, Catalin Marinas wrote: >> On Fri, Jan 17, 2014 at 09:40:02AM +0000, Jianguo Wu wrote: >>> Now disabling kmemleak is an irreversible operation, but sometimes >>> we may need to re-enable kmemleak at runtime. So add a knob to enable >>> kmemleak at runtime: >>> echo on > /sys/kernel/debug/kmemleak >> >> It is irreversible for very good reason: once it missed the initial >> memory allocations, there is no way for kmemleak to build the object >> reference graph and you'll get lots of false positives, pretty much >> making it unusable. > > Do you mean we didn't trace memory allocations during kmemleak disable period, > and these memory may reference to new allocated objects after re-enable? Yes. Those newly allocated objects would be reported as leaks. Catalin -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href