As seen below, a newly compiled 4.4.48 kernel, with CONFIG_DEBUG_KMEMLEAK enabled, is not creating the required file in /sys/kernel/debug. Note that kmemleak is not being explicitly disabled via the kernel command line options. Please CC me personally with any response.
[root@myVMslot12 ~]# uname -a Linux myVMslot12 4.4.48 #2 SMP Fri Feb 10 11:24:11 EST 2017 x86_64 x86_64 x86_64 GNU/Linux [root@myVMslot12 ~]# ls /sys/kernel/debug/kmemleak ls: cannot access /sys/kernel/debug/kmemleak: No such file or directory [root@myVMslot12 ~]# ls /sys/kernel/debug/ acpi cleancache extfrag ixgbe pm_qos sched_features suspend_stats virtio-ports bdi dma_buf fault_around_bytes kprobes ras sleep_time tracing wakeup_sources boot_params dynamic_debug hid mce regmap sunrpc usb x86 [root@myVMslot12 ~]# cat /proc/config.gz | gzip -d -c | 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 [root@myVMslot12 ~]# cat /proc/cmdline BOOT_IMAGE=/vmlinuz-4.4.48 root=UUID=b419f9ff-80ce-459e-855c-614d86a48105 ro rd.md=0 rd.lvm=0 rd.dm=0 KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb crashkernel=auto console=ttyS0,115200n8 rd.luks=0 LANG=en_US.UTF-8 audit=1 libata.force=noncq erst_disable
