On 05/06/2014 05:52 PM, Catalin Marinas wrote: > On 6 May 2014, at 19:15, Sasha Levin <sasha.levin@xxxxxxxxxx> wrote: >> On 05/06/2014 01:05 PM, Catalin Marinas wrote: >>> On Tue, May 06, 2014 at 04:20:27PM +0100, Sasha Levin wrote: >>>> On 05/02/2014 09:41 AM, Catalin Marinas wrote: >>>>> Currently, kmemleak_early_log is disabled at the beginning of the >>>>> kmemleak_init() function, before the full kmemleak tracing is actually >>>>> enabled. In this small window, kmem_cache_create() is called by kmemleak >>>>> which triggers additional memory allocation that are not traced. This >>>>> patch moves the kmemleak_early_log disabling further down and at the >>>>> same time with full kmemleak enabling. >>>>> >>>>> Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx> >>>>> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> >>>> >>>> This patch makes the kernel die during the boot process: >>>> >>>> [ 24.471801] BUG: unable to handle kernel paging request at ffffffff922f2b93 >>>> [ 24.472496] IP: [<ffffffff922f2b93>] log_early+0x0/0xcd >>> >>> Thanks for reporting this. I assume you run with >>> CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF enabled and kmemleak_early_log remains >>> set even though kmemleak is not in use. >>> >>> Does the patch below fix it? >> >> Nope, that didn't help as I don't have DEBUG_KMEMLEAK_DEFAULT_OFF enabled. >> >> For reference: >> >> $ cat .config | grep KMEMLEAK >> CONFIG_HAVE_DEBUG_KMEMLEAK=y >> CONFIG_DEBUG_KMEMLEAK=y >> CONFIG_DEBUG_KMEMLEAK_EARLY_LOG_SIZE=400 >> # CONFIG_DEBUG_KMEMLEAK_TEST is not set >> # CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF is not set > > I assume your dmesg shows some kmemleak error during boot? I’ll send > another patch tomorrow. Besides the BUG, I have these kmemleak messages: $ grep kmemleak out.txt [ 0.000000] kmemleak: Kernel memory leak detector disabled [ 0.000000] kmemleak: Early log buffer exceeded (2742), please increase DEBUG_KMEMLEAK_EARLY_LOG_SIZE Thanks, Sasha -- 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=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>