Re: Reading `/sys/kernel/debug/kmemleak` takes 3 s and content not shown

From: Christophe Leroy
Date: Tue Mar 26 2019 - 08:55:50 EST

Le 26/03/2019 Ã 13:49, Paul Menzel a ÃcritÂ:
Dear Linux folks,

On 19.02.19 10:44, Paul Menzel wrote:

On a the IBM S822LC (8335-GTA) with Ubuntu 18.10, and Linux 5.0-rc5+
accessing `/sys/kernel/debug/kmemleak` takes a long time. According to
strace it takes three seconds.

$ dmesg | grep leak
[ÂÂÂ 4.407957] kmemleak: Kernel memory leak detector initialized
[ÂÂÂ 4.407959] kmemleak: Automatic memory scanning thread started
[745989.625624] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
[1002619.951902] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)

Unfortunately, the leaks supposedly stored in that file are not shown

The problem is still present with Linux 5.0. Do you have an idea, how to fix this?

Have you identified a previous version that works properly ?

If so, have you been able to bisect the problem ?