I want to check whether the kernel driver module which I just finished has a memory leak problem. But I don't know how to do it in kernel space. Dynamic memory allocation is very hard to handle I think. Anyone has the experience in debugging such memory problem in kernel space? Or, which tool can I use to measure the dynamic memory usage of a specific kernel module?
Measure memory usage of a certain Linux driver module
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It's really hard to track allocation and freeing memory in a kernel module, but you have some facilities still. Here are a couple tools and approaches to investigate memory leakage in kernel space.
/proc/slabinfo (slabtop). It collects information about kernel structures. Not really about a module one. But it still might be very helpful.
Kmem and ftrace. Just links:
https://www.kernel.org/doc/Documentation/trace/events-kmem.txt
http://elinux.org/Kernel_dynamic_memory_analysis
Trap each kmalloc, kfree, etc. event and produce relevant information with them.(c)