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Subject: Re: Change eats memory on my server
To:     Eli Cohen <elic@nvidia.com>
Cc:     Thomas Zimmermann <tzimmermann@suse.de>,
        virtualization@lists.linux-foundation.org,
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From:   =?UTF-8?Q?Christian_K=c3=b6nig?= <christian.koenig@amd.com>
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Am 18.01.21 um 08:49 schrieb Eli Cohen:
> On Mon, Jan 18, 2021 at 08:43:12AM +0100, Christian König wrote:
>> Hi Eli,
>>
>> have you already tried using kmemleak?
>>
>> This sounds like a leak of memory allocated using kmalloc(), so kmemleak
>> should be able to catch it.
>>
> Hi Christian,
>
> I have the following configured but I did not see any visible complaint
> in dmesg.
>
> CONFIG_HAVE_DEBUG_KMEMLEAK=y
> CONFIG_DEBUG_KMEMLEAK=y
> CONFIG_DEBUG_KMEMLEAK_MEM_POOL_SIZE=16000
>
> Any other configuration that I need to set?

As long as you don't have any kernel parameters to enable it I think you 
need to do "echo scan > /sys/kernel/debug/kmemleak" to start a scan.

The result can then be queried using "cat /sys/kernel/debug/kmemleak".

Regards,
Christian.