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Is it a= leak? If so, how could I isolate them when kmemleak doesn't notice anythin= g? I have a workload involving an external kernel module providing a filesyste= m (no actual physical device) that had some leaks that kmemleak spotted and= I fixed. I still eventually (very slowly now) crash the kernel by running = out of memory. The only real peculiar thing I noticed is that the vmap_area= slab allocator in /proc/slabinfo continues to show growth into the hundred= s of thousands of objects. The workload involves loading the module, mounti= ng the file system, running some tests, unmounting the filesystem, and ulti= mately unloading the module. That should reclaim everything it was doing, a= nd I don't think I'm seeing virtual memory fragmentation since the buddy al= locator seems to stabilize on a proportion of sizes (disregarding it slowly= trending to the smallest size due to simply running out of total memory). I guess I should add that /proc/meminfo shows the used vmalloc'd memory as = stable this whole time. It doesn't increase. Total slab memory used does sl= owly rise. I have tried to track allocations and frees to vmap area with bpftrace. I h= ave a kretprobe on __vmalloc_node_range_noprof to hash the allocated pointe= r to the kernel stack, and I remove the entry when the address comes up on = kprobes on kvfree and vfree. I get a few entries this way to kernel_clone()= ->copy_process() that I have to sort out, but I need to emphasize kmemleak = doesn't point out a problem there. So I don't know if I'm just picking up s= ome end-of-run chatter or something.