Re: [PATCH] kmemleak: Increase maximum early log entries to 1000000

[Andrey Ryabinin]

On 7/23/19 11:13 AM, Nicolas Boichat wrote:
> On Tue, Jul 23, 2019 at 3:46 PM Dmitry Vyukov <dvyukov@xxxxxxxxxx> wrote:
>>
>> On Tue, Jul 23, 2019 at 9:26 AM Nicolas Boichat <drinkcat@xxxxxxxxxxxx> wrote:
>>>
>>> When KASan is enabled, a lot of memory is allocated early on,
>>> and kmemleak complains (this is on a 4GB RAM system):
>>> kmemleak: Early log buffer exceeded (129846), please increase
>>>   DEBUG_KMEMLEAK_EARLY_LOG_SIZE
>>>
>>> Let's increase the upper limit to 1M entry. That would take up
>>> 160MB of RAM at init (each early_log entry is 160 bytes), but
>>> the memory would later be freed (early_log is __initdata).
>>
>> Interesting. Is it on an arm64 system?
> 
> Yes arm64. And this is chromiumos-4.19 tree. I didn't try to track
> down where these allocations come from...
> 

Is this still a problem in upstream tree? 4.19 doesn't have fed84c785270 ("mm/memblock.c: skip kmemleak for kasan_init()")